CYMA Platinum SLR Airsoft Works AK-74 AEG; Kestrel Basic ETU

CYMA
Code: FB4127E
£359.99
  • Full metal construction
  • Tracer unit built into the HOP-up - Awesome!
  • EShooter Kestrel Basic programmable ETU

If you ever wanted to light the enemy up with tracer BBs but don't like the looks of a suppressor, the CYMA Platinum SLR Airsoft Works AK-74 AEG is your dream come true! This pre-upgraded AK AEG is officially licenced by SLR Rifleworks and boasts a full metal build with plenty of steel, CYMA's impressive E-EDITION High Speed internals and a tracer unit integrated into the HOP-up unit, meaning you don't need to add length or weight with a tracer unit to get an instinct aiming advantage in CQB or low light skirmishes.

With pre-installed 13:1 high speed CNC steel gears, a CNC aluminium piston head and cylinder head, a high torque Neodymium magnet motor and a 6.03mm tightbore inner barrel, there is practically nothing left to upgrade on this beast! Also inside this, the latest version of the SLR AK-74 we are treated to the EShooter Kestrel Basic ETU, offering 3-round burst and binary trigger, adjustable pre-cocking, active braking, cycle completion, low battery warning and low/high voltage protection. Make no mistake, this beast is even more kitted out than the previous version!

Whether you seek a modernised AK to add to your arsenal or you are smitten by the sound of a built-in tracer unit, the CYMA Platinum SLR Airsoft Works AK-74 AEG will make your day with its thunderous rate of fire, superb long range accuracy, flawless build quality and now, programmable fire controls!

Full description

Description

This AEG has a tracer unit integrated into the HOP-up unit. This means it is more important than ever to remove your battery when you have finished shooting. If you leave your battery installed, the AEG will drain it and potentially render it useless. To turn the tracer unit off, flick the switch on the rear right of the HOP-up unit, accessible when the bolt carrier is held back. 

If you're in the mood for a full length AK with a modern twist, the CYMA Platinum SLR Airsoft Works AK-74 AEG is exactly that. This AK is based around the sensational CYMA Platinum E-EDITION High Speed internals, rocking a high torque Neodymium magnet motor, CNC aluminium piston and cylinder head, 13:1 CNC steel high speed gears, 8mm ball bearing bushings and the EShooter Kestrel Basic MOSFET/ETU to keep everything running smoothly and add programmable fire controls into the mix!

The party trick of this AK is its integral tracer unit, mounted to the HOP-up unit and powered by the same battery that powers the AEG itself. This means you can light the night up with tracer BBs without needing to mount anything to the 14mm CCW threads up front, keeping the weight of the platform as low as possible and maintaining its excellent handling qualities. This is a very impressive feature to find in a mid-priced AEG and has previously only been available on the aftermarket for a premium price while requiring extra expertise to install.

As we might expect for a platform licenced by SLR Rifleworks itself, the SLR AK-74 is dressed to impress on the outside. We are treated to a full metal build with a large proportion of steel parts, a licenced SLR Rifleworks Billet stock and Synergy Mini-Comp muzzle brake, an M-LOK/20mm Picatinny hybrid handguard and a 20mm Picatinny railed gas tube. The result is a realistically built AK replica bristling with the most modern accessory attachment interfaces available, ready to be decked out!

Starting at the front, we can find a highly detailed replica of the SLR Rifleworks Synergy Mini-Comp muzzle brake with multiple ports around its circumference and an engraved SLR marking on the bottom. The device looks fantastic on the 1Ak-74, giving it a brutal and menacing front end for an extra intimidation factor. The muzzle device mounts to 14mm CCW male threads, meaning you can swap it out for an alternative if you have a preferred muzzle device, just make sure you remove the grub screw first. It goes without saying, you won't need a tracer for this bad boy as there is already a tracer unit built into the HOP-up!

To the rear of the Mini-Comp, we come to the front sight, a standard AK-74 front sight block with an adjustable front blade protected on either side with built-in protective wings. This part is constructed from alloy and has a very realistic finish applied, simulating the anti-corrosion paint applied to real Russian AK rifles. The front sight can be adjusted for elevation using a front sight adjustment tool and is one of the few aspects of the iconic AK silhouette that remains on this customised piece.

Behind the front sight, we come to the outer barrel which sports realistic grooves along its design, intended to help dissipate built-up heat in the real rifle. This also adds a bit of visual interest to the design and makes the barrel less reflective, helping you stay concealed in woodland skirmishes. The outer barrel is constructed from alloy and is of the standard 16.3-inch AK length, meaning a lengthy tightbore inner barrel so you can harass the enemy team out to long range.

Following the barrel back, we can find the gas block of the AK-74 which is finished with the same simulated anti-corrision finish as the front sight. The change in finish between the barrel, gas parts and receiver adds contrast to the SLR AK-74 design and makes it look that bit more realistic, avoiding the telltale signs of being a replica and giving it the same level of detail as the real thing.

Behind the gas block, we come to the gas tube which is constructed from aluminium and equipped with a 20mm Picatinny rail at the top. This rail is perfect for mounting a red dot sight but there is plenty of room in front for an offset flashlight mount or other 20mm Picatinny accessories. Mounting an RMR-style or T1-style micro-red dot here can give you a lower 1/3 co-witness with the iron sights, making for more intuitive aiming and a great combination of precision along with fast target acquisition. The upper handguard also includes a discrete SLR trademark at the front, a subtle display of SLR's pride in its design.

The lower handguard is an M-LOK/20mm Picatinny hybrid design, replicating the real steel SLR AK "Solo" handguard, with 20mm Picatinny rails at the front and M-LOK slots following just behind. The front Picatinny sections are in the perfect spot to mount a tactical flashlight or laser and also have a QD socket built into each, ready for a QD sling swivel to be added. The M-LOK slots give you access to the latest vertical and angled foregrip designs but can also be used to mount 20mm Picatinny rail adapters for M-LOK, offering a wider variety of accessory options than either M-LOK or 20mm Picatinny alone. The handguard is constructed from aluminium and has linear grooves at the offset angles, intended to provide extra grip to improve wet weather handling.

Following the handguard, we come to the trunnion block which provides the mounting point for the classic AK tangent rear iron sight. The rear sight provides multiple graduations for adjustment and a fine rear sight notch to align with the front sight post. The authentic Russian Cyrillic markings on the sight add a touch of realism, and the sight itself can be adjusted by pressing the drums on either side of the sight notch and moving the notch back and forth on its base. The lever on the right side is the handguard disassembly lever and is functional, but due to the use of a railed gas tube, the Allen bolts holding the gas tube on will need to be removed before the lever comes into use.

The receiver itself follows the standard AK-47/74 format with a centrally positioned ambidextrous magazine release at the front of the trigger guard, a mock bolt carrier on the right side of the receiver and a 3-position fire selector on the right side. The fire selector provides 3 modes of fire; safe, full auto and semi-auto, in that order. It is an AK after all! This was designed in to allow for fast selection of semi-auto with a quick sweep down of the selector, and isn't actually because the AK was designed for full auto, as is the common myth. This selector has also been enhanced by SLR and perfectly replicated by CYMA, featuring a welded-on extension to allow you to switch modes with your trigger finger without removing your hand from the pistol grip.

The receiver top cover of the SLR AK-74 is also constructed from stamped steel and is the appropriate design for a modern AK, with ribs stamped into the upper surface to provide additional strength while keeping the material thin and lightweight. The battery compartment is beneath the top cover, and to access it, simply press the button at the rear of the top cover and it should come straight off, revealing a Deans/T-plug battery connector.

Thanks to its pre-installed EShooter Kestrel Basic MOSFET and highly upgraded internals, the SLR AK-74 is ready for an 11.1V LiPo straight out of the box, and we recommend an 11.1V 1200mAh LiPo in AK stick configuration for a perfect fit and excellent performance. With the battery connected and installed, you can place the top cover back onto the receiver, align the button with the hole in the rear of the top cover, and pull the charging handle to lock the cover down if necessary.

To access the HOP-up unit of the SLR AK-74, simply hold the charging handle to the rear to reveal the alloy slider adjustable HOP-up unit. The slider unit is known as one of the best designs out there, and that is the reason this unit has not changed in design since the original Tokyo Marui AK-47 AEG. To increase the HOP-up effect, simply move the slider rearwards. Returning the slider to the front will reduce the HOP-up to its lowest setting. This HOP-up also has some extra wires and circuit boards on it, adding tracer functionality so you can light the enemy up without needing to add a tracer muzzle device.

The pistol grip of the SLR AK-74 is a standard AKM/AK-74 type pistol grip, with diamond checkering on either side to ensure the rifle stays firmly in your grasp in any weather condition. The trigger guard and magazine release can be found just ahead of the pistol grip, and are constructed from steel to provide solid magazine locking and ample rigidity. The magazine release is placed in the centre of the receiver and is accessible from either side of the AEG. The magazine retention system of the AK platform is a "rock and lock" motion, requiring you to first index the front "hook" on the magazine inside the receiver, then rock the magazine to engage the catch.

At the rear of the SLR AK-74, we have a highly detailed licenced replica of the real steel SLR Rifleworks AK Billet stock, constructed from aluminium using CNC technology for the perfect combination of low weight and high strength. The stock is side folding, just like the original AK-74 steel side folder, but is far lighter and requires far less effort to fold and deploy.

To fold the stock, simply pull it upwards to defeat the spring-loaded hinge mechanism and the stock will fold to the side, staying in place without the need for a fiddly latch or any buttons whatsoever. The stock also features SLR trademarks engraved on either side and an ambidextrous QD sling socket, allowing a two-point rifle sling to be mounted when paired with the front QD sling sockets and QD sling swivels.

Inside the SLR AK-74, we are treated to the best internals CYMA currently has to offer. The gearbox shell is a version 3 design with reinforcements in all the key places, the gears are CNC steel 13.1 ratio high-speed examples and the motor is a neodymium magnet high torque motor, guaranteeing a speedy rate of fire which will have the enemy on the run!

The gearbox internals are also all upgraded, including a polycarbonate piston with a steel tooth rack, 8mm steel ball bearing bushings, a CNC aluminium ball bearing silent piston head, a ball bearing spring guide and a double O-ring equipped CNC aluminium silent cylinder head, promising smooth performance, flawless air seal qualities and enhanced durability to maintain reliability at high-performance parameters. The EShooter Kestrel Basic MOSFET is the icing on the cake, offering 6 levels of adjustable pre-cocking, options for 3 round burst and binary trigger along with low battery warning, cycle completion, active braking and low/high voltage cutoff.

If you've been keeping your eye out for a modernised AK but you want a full-sized rifle and none of this carbine nonsense, the CYMA SLR AK-74 is one to watch. Its high end, cutting-edge looks will make it a head-turner in the safe zone and its thoroughly upgraded internals with a tracer HOP-up to top it off will keep the enemy at bay as long as you do your part!

Features

  • Full metal construction - Mostly steel
  • Tracer unit built into the HOP-up unit - Powered by the AEG's battery
  • 6.03mm Tightbore inner barrel - Improved accuracy potential
  • Licensed SLR Synergy Mini-Comp pre-installed - Awesome looking muzzle device
  • 14mm CCW Male threaded barrel - Ready for a suppressor or alternative flash hider
  • QD sling sockets at 3, 6, & 9 o'clock on the handguard - Plenty of sling options
  • M-LOK/20mm Picatinny hybrid SLR "Solo" lower handguard - M-LOK slots at 3, 6 & 9 o'clock with 20mm rails in front
  • 20mm Picatinny railed upper handguard - Ready for a red dot sight, laser unit or other 20mm accessories
  • Tangent iron sights - Adjustable via the drums on either side of the rear sight, authentic Cyrillic markings
  • Steel receiver and top cover - Realistically hefty and solid, a mix of real and mock rivets in all the right spots
  • Textured pistol grip - Standard AK-74 design, diamond texture on each side for improved grip
  • Ambidextrous magazine release - Centrally positioned, accessible from either side
  • Extended fire selector lever - Switch fire modes with the trigger finger from a firing grip
  • Licensed replica SLR AK Billet Stock - Ultra light side folding stock, 6061 Alu construction
  • On-Off Switch for the integral tracer unit - On the right side of the HOP-up unit, accessible with the bolt pulled back
  • Kestrel Basic MOSFET/ETU functions:
    • Adjustable pre-cocking
    • Binary Trigger
    • 3-Round burst
    • Active braking
    • Low/high voltage cutoff
    • Low battery warning
  • Kestrel Basic MOSFET/ETU programming instructions available here
  • CYMA Platinum E-EDITION High Speed internals:
    • Reinforced Version 3 gearbox shell with quick change spring system
    • Polycarbonate piston with full steel tooth rack
    • CNC Machined steel 13:1 high speed gear set
    • 8mm Ball bearing bushings
    • CNC Aluminium silent ball bearing piston head
    • CNC Aluminium silent double O-ring cylinder head
    • Ball bearing quick change spring guide
    • High speed Neodymium magnet motor
    • Low resistance wiring
  • Rear wired: Deans/T-plug battery connector - Recommended battery: 11.1V 1200mAh LiPo AK Stick battery
  • Compatible with AK-47/74 AEG magazines - Spares are always available

Package Includes

  • CYMA Platinum SLR Airsoft Works AK-74 AEG; Kestrel Basic ETU
  • 140rnd Mid-cap magazine
  • Speed loader

Specification

General

Weapon Construction External
Weapon Type
Assault Rifle
Over 18 Only Icon
Over 18
Yes
Icon UKARA - United Kingdom Airsoft Retailer Association
Defence / UKARA Required
Yes, No,
FPS Icon
FPS (Feet Per Second), using 0.20g BB
Approx. 315fps ± 10%, using 0.20g BB
Site Legal Icon
Site Legal, using 0.20g BB
Yes
Screwdriver Icon
Pre-Built
Yes
Package
Included Items
  • Magazine
  • Speed Loader
Skill Level Icon
User Skill Level
Regular Player
Patrol Base - Warning Icon
Warnings
Li-Po - Never Leave Charging Unattended
Li-Po
Li-Po - Only Use Approved Chargers
Li-Po - Charge in a Fire Safe Area

Weight and Dimension

Weight KG Icon
Weight (KG)
Approx. 3.213kg
Weapon Length Collapsed
Length (Collapsed)
69cm
Weapon Length Extended
Length (Extended)
89cm

Construction

Colour Wheel Greyscale
Primary Colour
Black
Construction Icon
Construction
Steel muzzle brake, receiver, top cover, fire selector & trigger guard assembly. Alloy front sight/gas block, trunnion block & outer barrel. Aluminium stock & handguards. Polymer pistol grip
Weapon Construction External
External Construction
Polymer
Alloy
Aluminium
Steel
Gearbox Icon
Internal Construction
Polymer
Alloy
Aluminium
Steel

Weapon Specific

Power Source Icon
Powered By
Electric
Blowback Icon
Blowback
None
Weapon Platform
AK, AK74, AK Variant , Assault Rifle,
Magazine Style Icon
Magazine Style
AK Platform, Long Gun Magazine, Assault Rifle,
Fire Select Icon
Fire Selector
PatrolBase | Fire Select Safe
Safe
Patrol Base | Fire Select - Semi Automatic
Semi Automatic
Patrol Base | Full Automatic
Full Automatic
Programmable
Weapon Safety Features Icon
Safety Features
Trigger Lock
Shooter Configuration Icon
Shooter Configuration
Right Handed
Weapon Configuration Icon
Weapon Configuration
Standard
Weapon Scale Icon
Weapon Scale
1:1
Suggested BB Weight
0.25g

Hop-Up

Hop-Up Unit Icon
Hop-Up Unit
Yes
Hop-Up Unit Adjuster Icon
Hop-Up Adjuster
Rotary
Hop-Up Unit Location Icon
Hop-Up Location
Behind mock bolt carrier, accessible when the charging handle is pulled and held to the rear.

Furniture

Weapon Furniture Icon
Furniture
  • Railed Handguard
  • Ambidextrous Magazine Release
  • Threaded Outer Barrel
  • QD Sling Point
  • Muzzle Brake
  • Textured Pistol Grip
  • 20mm Top Rail
  • Adjustable open iron sights
  • M-LOK Handguard
  • Extended fire selector lever
  • Side folding stock
Rail System Icon
Rail System
20mm RIS / RAS , M-LOK Rail system,
Icon Stock Positions
Stock Setting
Folding , Skeleton side folding stock,
Weapon Length Extended
Stock Positions
2 Position
Sight Type Icon
Sight Type
Iron Sights , Tangent Open Iron Sight, Open Iron Sight,
Sling Plate Icon
Sling Options
Stock , Handguard , QD ,

Barrel

Outer Barrel Length (in)
16.3''
Icon Thread Type
Outer Barrel Thread Type
Male
Icon Thread Direction
Outer Barrel Thread Direction
CCW (Counter Clockwise)
Outer Barrel Thread Size
14mm
Inner Barrel Diameter
6.03mm
Inner Barrel Length
455mm

Magazine Specific

Magazine Type
Medium Capacity , AEG,
Magazine BB Capacity
Approx. 140 Rounds
Magazine BB Fill Method
Speed Loader
Magazine BB Fill Location
Top

Electric Gun Specific Information

Gearbox
Gearbox Icon
Gearbox Version
V3 Gearbox
Wiring Icon
Gearbox Wiring
Top Wired
Spring Change Icon
Gearbox Quick Change Spring
Yes
Digital Trigger Icon
Gearbox Electronic Trigger
Yes
Split Gearbox Icon
Split Gearbox Design
No
Motor
Airsoft Motor Icon
Motor Type
High Torque
Battery Specific
Battery Connector
Patrol Base | Icon | Deans
Deans
Compatible Battery
Compatible Battery Type
Li-Po
Compatible Battery Configuration
AK Stick (Slim)
Compatible Battery Voltage
11.1v

Product Testing Data

Notepad Icon
Test Description
315 FPS +/- 10%
Notepad Icon
Tested Using
0.2g ASG Blaster BBs
Notepad Icon
Test Date
09/10/2024

Size guide

Joule Charts

Special Instructions

These table can be used as a reference to see if the BB weight you are using will be over acceptable Joulage limits at some Airsoft Sites in the UK. To check if the weight can be used chrono your weapon using the BB you intend to use, and then compare it to the chart.

FPS, Power and Joule Limits can vary from site to site, so please get in touch with where you're going to play with in advance to avoid disappointment.

Suggested limits are based on Joulage Limit rules used Halo Mill: Proving Grounds, with a 350fps limit for Automatic Replicas, 400fps for Semi-Automatic Replicas, and 500fps for Bolt Action Replicas.

Tap the tabs below to open the relevant chart for your replica.

Suggested limits are based on Joulage Limit rules used Halo Mill: Proving Grounds, and is the equivalent of 350fps, using 0.20g BB resulting in an upper limit of 1.14j.

Velocity BB Weight (Grams)
FPS 0.20 0.25 0.28 0.30 0.32 0.36 0.40 0.43 0.45 0.50
250 0.58 0.73 0.81 0.87 0.93 1.05 1.16 1.25 1.31 1.45
260 0.63 0.79 0.88 0.94 1.00 1.13 1.26 1.35 1.41 1.57
270 0.68 0.85 0.95 1.02 1.08 1.22 1.35 1.46 1.52 1.69
280 0.73 0.91 1.02 1.09 1.17 1.31 1.46 1.57 1.64 1.82
290 0.78 0.98 1.09 1.17 1.25 1.41 1.56 1.68 1.76 1.95
300 0.84 1.05 1.17 1.25 1.34 1.51 1.67 1.80 1.88 2.09
310 0.89 1.12 1.25 1.34 1.43 1.61 1.79 1.92 2.01 2.23
320 0.95 1.19 1.33 1.43 1.52 1.71 1.90 2.05 2.14 2.38
325 0.98 1.23 1.37 1.47 1.57 1.77 1.96 2.11 2.21 2.45
328 1.00 1.25 1.40 1.50 1.60 1.80 2.00 2.15 2.25 2.50
330 1.01 1.26 1.42 1.52 1.62 1.82 2.02 2.18 2.28 2.53
335 1.04 1.30 1.46 1.56 1.67 1.88 2.09 2.24 2.35 2.61
340 1.07 1.34 1.50 1.61 1.72 1.93 2.15 2.31 2.42 2.68
345 1.11 1.38 1.55 1.66 1.77 1.99 2.21 2.38 2.49 2.76
350 1.14 1.42 1.59 1.71 1.82 2.05 2.28 2.45 2.56 2.85
355 1.17 1.46 1.64 1.76 1.87 2.11 2.34 2.52 2.63 2.93
360 1.20 1.51 1.69 1.81 1.93 2.17 2.41 2.59 2.71 3.01

Suggested limits are based on Joulage Limit rules used at Halo Mill: Proving Grounds, and is the equivalent of 400fps, using 0.20g BB resulting in an upper limit of 1.49j.

Velocity BB Weight (Grams)
FPS 0.20 0.25 0.28 0.30 0.32 0.36 0.40 0.43 0.45 0.50
250 0.58 0.73 0.81 0.87 0.93 1.05 1.16 1.25 1.31 1.45
260 0.63 0.79 0.88 0.94 1.00 1.13 1.26 1.35 1.41 1.57
270 0.68 0.85 0.95 1.02 1.08 1.22 1.35 1.46 1.52 1.69
280 0.73 0.91 1.02 1.09 1.17 1.31 1.46 1.57 1.64 1.82
290 0.78 0.98 1.09 1.17 1.25 1.41 1.56 1.68 1.76 1.95
300 0.84 1.05 1.17 1.25 1.34 1.51 1.67 1.80 1.88 2.09
310 0.89 1.12 1.25 1.34 1.43 1.61 1.79 1.92 2.01 2.23
320 0.95 1.19 1.33 1.43 1.52 1.71 1.90 2.05 2.14 2.38
330 1.01 1.26 1.42 1.52 1.62 1.82 2.02 2.18 2.28 2.53
340 1.07 1.34 1.50 1.61 1.72 1.93 2.15 2.31 2.42 2.68
350 1.14 1.42 1.59 1.71 1.82 2.05 2.28 2.45 2.56 2.85
360 1.20 1.51 1.69 1.81 1.93 2.17 2.41 2.59 2.71 3.01
370 1.27 1.59 1.78 1.91 2.03 2.29 2.54 2.73 2.86 3.18
380 1.34 1.68 1.88 2.01 2.15 2.41 2.68 2.88 3.02 3.35
390 1.41 1.77 1.98 2.12 2.26 2.54 2.83 3.04 3.18 3.53
400 1.49 1.86 2.08 2.23 2.38 2.68 2.97 3.20 3.34 3.72
410 1.56 1.95 2.19 2.34 2.50 2.81 3.12 3.36 3.51 3.90

Suggested limits are based on Joulage Limit rules used at Halo Mill: Proving Grounds, and is the equivalent of 500fps, using 0.20g BB resulting in an upper limit of 2.32j.

Velocity BB Weight (Grams)
FPS 0.20 0.25 0.28 0.30 0.32 0.36 0.40 0.43 0.45 0.50
250 0.58 0.73 0.81 0.87 0.93 1.05 1.16 1.25 1.31 1.45
260 0.63 0.79 0.88 0.94 1.00 1.13 1.26 1.35 1.41 1.57
270 0.68 0.85 0.95 1.02 1.08 1.22 1.35 1.46 1.52 1.69
280 0.73 0.91 1.02 1.09 1.17 1.31 1.46 1.57 1.64 1.82
290 0.78 0.98 1.09 1.17 1.25 1.41 1.56 1.68 1.76 1.95
300 0.84 1.05 1.17 1.25 1.34 1.51 1.67 1.80 1.88 2.09
310 0.89 1.12 1.25 1.34 1.43 1.61 1.79 1.92 2.01 2.23
320 0.95 1.19 1.33 1.43 1.52 1.71 1.90 2.05 2.14 2.38
330 1.01 1.26 1.42 1.52 1.62 1.82 2.02 2.18 2.28 2.53
340 1.07 1.34 1.50 1.61 1.72 1.93 2.15 2.31 2.42 2.68
350 1.14 1.42 1.59 1.71 1.82 2.05 2.28 2.45 2.56 2.85
360 1.20 1.51 1.69 1.81 1.93 2.17 2.41 2.59 2.71 3.01
370 1.27 1.59 1.78 1.91 2.03 2.29 2.54 2.73 2.86 3.18
380 1.34 1.68 1.88 2.01 2.15 2.41 2.68 2.88 3.02 3.35
390 1.41 1.77 1.98 2.12 2.26 2.54 2.83 3.04 3.18 3.53
400 1.49 1.86 2.08 2.23 2.38 2.68 2.97 3.20 3.34 3.72
410 1.56 1.95 2.19 2.34 2.50 2.81 3.12 3.36 3.51 3.90
420 1.64 2.05 2.29 2.46 2.62 2.95 3.28 3.52 3.69 4.10
430 1.72 2.15 2.40 2.58 2.75 3.09 3.44 3.69 3.86 4.29
440 1.80 2.25 2.52 2.70 2.88 3.24 3.60 3.87 4.05 4.50
450 1.88 2.35 2.63 2.82 3.01 3.39 3.76 4.04 4.23 4.70
460 1.97 2.46 2.75 2.95 3.15 3.54 3.93 4.23 4.42 4.91
470 2.05 2.57 2.87 3.08 3.28 3.69 4.10 4.41 4.62 5.13
480 2.14 2.68 3.00 3.21 3.42 3.85 4.28 4.60 4.82 5.35
490 2.23 2.79 3.12 3.35 3.57 4.02 4.46 4.80 5.02 5.58
500 2.32 2.90 3.25 3.48 3.72 4.18 4.65 4.99 5.23 5.81
510 2.42 3.02 3.38 3.62 3.87 4.35 4.83 5.20 5.44 6.04