Specna Arms SA-B01 M4A1 Carbine Assault Rifle

Specna Arms
Code: …
€227.99
  • Adjustable Stock
  • Removable Carry Handle
  • Enter & Convert™ Spring System

Based off the standard M4A1 used by the US Army and Marines this rifle is a high quality replica built by Specna Arms with high levels of detail, finish, with a top quality wobble free design. If you're looking for a high quality full metal rifle for a beginner weapon you're going to be hard pressed to find anything else in this price range of this quality.

Full description

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Size guide

Description

Built by Specna Arms to the highest quality these weapons are alloy in all the right places, with an alloy buffer tube, receiver, sling plate, outer barrel and carry handle, with a polymer stock, pistol grip and hand-guard. The weapon features various trademarks and stickers which all add to the weapon's realism, with a US Navy insignia on the magazine well.

The receiver features a top 20mm RIS / RAS rail which is revealed once the carry handle has been removed allowing the attachment of a wide variety of sights and scopes, and is the perfect home for a holographic or red-dot sight. The receiver also features a rear buffer tube sling plate which allows a variety of single point slings to be attached, and is made from metal to ensure that it is durable enough to take all the rough and tumble that comes along with a days skirmish.

The hand guard is based on the traditional standard hand-guard for an M4A1, and is designed to split just like the real thing, and is also where the batteries are stored inside the weapon. The hand-guard can also be replaced with other standard type M4 hand guard, and if the front post sight and d-ring are removed supports a wide range of aftermarket hand guard.

Internally the weapon contains everything you would expect from a modern Airsoft replica and more, with Silver wiring for low resistance, a v2 front wired gearbox with quick change spring system, 8mm ball bearings and is compatible with most Ni-mh, LiPo and LiFe batteries. We recommend a 7.4v LiPo stick or crane stock Tamiya battery. The weapon also features an adjustable hop-up system which is designed to add spin to the BB to add range and accuracy, and is fully adjustable to allow support for a wide range of BB weights.

This rifle is perfect for those Airsoft players who are looking for a traditional looking M4, but with plenty of strength and durability. This rifle is a perfect beginner weapon because not only is it excellent quality, but leaves plenty of room for external upgrades, with plenty of options for compatibility with aftermarket parts.

Features

  • Built by Specna Arms
  • Based off the standard M4A1 used by the US Army
  • Electric powered Airsoft AEG
  • 7.4v LiPo stick / crane stock Tamiya recommended
  • Removable carry handle to reveal a top 20mm RIS / RAS rail for sights and scopes
  • 14mm CCW threaded outer barrel for attaching Suppressors and Tracer Units
  • Rear QD sling loop mount point
  • Front bayonet lug
  • Front and rear sling loops
  • D-Ring held removable handguard
  • Adjustable Hop-Up unit for range and accuracy
  • Metal high capacity Hi-Cap wheel wound 300rnd Magazine
  • Adjustable Crane Style Stock
  • Enter & Convert™ quick change spring system
  • Compatible with Ni-Mh, LiPo, and LiFe batteries
  • Batteries stored in the handguard
  • Front wired Gearbox System
  • Silver wiring for minimal resistance
  • 8mm Ball Bearings with steel thread-wheels
  • Type 2 cylinder
  • Metal hop-up unit
  • Mock charging handle
  • Finger ridged pistol grip ergonomic design
  • Compatible with a wide range of Airsoft STANAG Magazine
  • Well weight balanced
  • RoHS Compliant
  • Wobble free, heavy duty construction
  • Branded:
    • 'MARINE ENV.M-4'
    • '5.56MM NATO'
    • 'S044053'
    • SPECNA ARMS INDUSTRIES'
    • 'CAGE: 68407'
    • 'PART# 49672380'
    • 'SERIAL# SA2689'

Package Includes

  • SA-B01 M4A1 Carbine Assault Rifle
  • Magazine
  • Iron Sight Carry Handle

Recommended Battery

For this rifle we recommend a 7.4v LiPo with Tamiya connector in stick or crane stock configuration.

Special Instructions

The externals of the replica are metal where they would be on the real world gun. This includes things like the outer barrel, handguard, and receiver. If a real world gun has polymer parts then the gun will still be marked as full metal externals, examples of this would be an M4, where the Stock and Pistol grip are always made from Polymer.

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. 310fps ± 10%, using 0.20g BB
Site Legal Icon
 Site Legal, using 0.20g BB
Yes
Screwdriver Icon
 Pre-Built
Yes
Package
 Included Items
  • Magazine
  • Iron Sight
Skill Level Icon
 User Skill Level
Starter, Regular Player,
Patrol Base - Warning Icon
 Warnings
Li-Po - Never Leave Charging Unattended
Li-Po - Only Use Approved Chargers
Li-Po - Charge in a Fire Safe Area

Weight and Dimension

Weight KG Icon
 Weight (KG)
Approx. 2.58kg
Weapon Length Collapsed
 Length (Collapsed)
80cm
Weapon Length Extended
 Length (Extended)
88cm

Construction

Colour Wheel Greyscale
 Primary Colour
Black,
Half-Tan
 Half-Tan,
Two Tone Icon
 Pre Two-Toned
No
Construction Icon
 Construction
Alloy
Weapon Construction External
 External Construction
Polymer
Alloy
Gearbox Icon
 Internal Construction
Polymer
Alloy

Weapon Specific

Power Source Icon
 Powered By
Electric
Blowback Icon
 Blowback
None
Weapon Platform
M4 / AR-15 / M16
Magazine Style Icon
 Magazine Style
STANAG
Fire Select Icon
 Fire Selector
PatrolBase | Fire Select Safe
 Safe
Patrol Base | Fire Select - Semi Automatic
 Semi Automatic
Patrol Base | Full Automatic
 Full Automatic
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
Gear
Hop-Up Unit Location Icon
 Hop-Up Location
Adjustable behind dust cover

Furniture

Weapon Furniture Icon
 Furniture
Finger Ridged Pistol Grip
Rail System Icon
 Rail System
20mm RIS / RAS
Icon Stock Positions
 Stock Setting
Multi-Position
Sight Type Icon
 Sight Type
Aperture Iron Sight
Sling Plate Icon
 Sling Options
Loop

Barrel

Icon Thread Type
 Outer Barrel Thread Type
Male
Icon Thread Direction
 Outer Barrel Thread Direction
CCW (Counter Clockwise)
Outer Barrel Thread Size
14mm

Magazine Specific

Magazine Type
High Capacity, Wheel Wound, AEG,
Magazine BB Capacity
Approx. 300 Rounds
Magazine BB Fill Method
Fill Window
Magazine BB Fill Location
Top

Electric Gun Specific Information

Gearbox
Gearbox Icon
 Gearbox Version
V2 Gearbox
Wiring Icon
 Gearbox Wiring
Front Wired
Spring Change Icon
 Gearbox Quick Change Spring
Yes
Digital Trigger Icon
 Gearbox Electronic Trigger
No
Split Gearbox Icon
 Split Gearbox Design
No
Motor
Airsoft Motor Icon
 Motor Type
Standard
Battery Specific
Battery Connector
Patrol Base | Icon | Mini Tamiya
 Mini Tamiya
Compatible Battery
Compatible Battery Type
Li-Po
Compatible Battery Configuration
Crane
Compatible Battery Voltage
7.4v

Product Testing Data

Notepad Icon
 Test Description
Using 0.20g BB

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