- 20mm quad rail
- Great starter gun
- Vast attachment range
CYMA brings us a fantastic M4 rifle at this price range. Great for starting your Airsoft skirmish journey, this electric 6mm BB gun, commonly known as an AEG is built and designed to replicate the M4A1 used by armed forces around the world. With 7 inch 20mm RIS rails, you have the option to add any accessories to suit your playstyle, with the length being good middle ground between close quarters battle (CQB) and commando size.
Fast Delivery
Delivery & Postage
Here at Patrol Base, we send all our packages from our Warehouse based in the UK with the exception of European Warehouse Items. All of our parcels are sent with specially picked couriers to ensure your parcels get to you on time and in one piece.
For more information please check out our Delivery Information Page.
Estimates
Below are some rough postage prices for orders. Please note these are subject to change and are only a rough guide. For a more accurate postage estimate please use the Postage Calculator at the basket.
UK Standard
£6.95
From
UK 24hr Dispatch
£8.95
From
Highlands / Islands
£24.99*
From
* Please note that Scottish Highlands, and Islands postage prices can vary wildly. Please refer to the Postage Calculator at the basket for the lowest possible price.
Returns
We want you to be absolutely happy with our products and services, so we provide the simple Patrol Base guarantee: if on receiving your item you are unhappy with your item for any reason then simply send it back to us. We will replace or refund the item.
You can return any item for any reason whatsoever, even if you have just changed your mind, within 14 days of receipt of the order. This is in addition to your rights under the Consumer Protection (Distance Selling) Regulations 2000.
For more information on returning products, and how to do it please visit our Returns Policy Page.
Description
A replica of one of the most recognisable weapons platforms in use today, the legendary M4A1. The CM.517 M4 Combat Machine is constructed with a tough but extremely lightweight polymer receiver, stock, buffer tube, handguard and sights, with an alloy barrel and internals.
At the very front of the gun is a polymer flash hider, adding to the militant style of the rifle, being attached to the barrel via 14mm counter clockwise thread, should you want to swap it out for a different variant, or maybe add a suppressor or tracer unit. Whatever you're style, you've got that option!
The front sight features a triangular design with sling adaptor in line with the real M4A1, with a high profile, allowing for ease of aiming in that your head won't need to be as close to the rifle as with other sight layouts, letting you speedily pick off those longer range targets with ease. The removable rear sight can be adjusted for windage / elevation depending on the skirmish at hand or weather conditions.
Moving along to the barrel we come to the Quad Rail 20mm RIS / RAS handguard / rail system enabling a multitude of attachment such as grips, torches, lasers and sights, again giving you a vast variety of playstyle options as big as your imagination, as well as a full length, topside 20mm Rail for attaching larger sights and scopes at the rear of the rail.
The body of the rifle is constructed from sturdy, dense polymer and features dummy bolt catch to replicate the real thing. The fire select is for right handed use, easily switching modes with the thumb, with the mag release on the right hand size of the gun easily accessed with the index finger.
The classic style M4 STANAGo magazine is a 300rnd high cap magazine, easily wound from the bottom of the mag to keep you shooting full auto for long periods of time.
By pulling back the bolt catch, the internal Hop-up unit is revealed, adjusted by turning the gear, giving you the option to set the BB spin, adjusting for windage, elevation and range.
The stock of the CM.517 features a Six Point adjustment system, allowing you to adjust the length of pull between 70cm - 80cm, for a more comfortable shoulder weld, depending on your size. The butt plate of the stock is made from rubber, providing a slip free surface for additional grip to help cope with wet weather conditions.
As this rifle is rear wired, to access the battery connector simply pull the adjuster tab on the stock down and slide the stock off to reveal the buffer tube, and Tamiya connector. A wider range of batteries can be used, such as crane stock batteries or Li-Po which fit down the buffer tube. We recommend 8.4v NiMh Crane Stock Battery or 7.4V 1300mAh 15C LiPo Stick Battery for this rifle.
The tightbore barrel is a good addition in that it allows for greater accuracy and range, able to hit those far away targets than other M4's missing this feature.
This is the perfect starter AEG for those wanting to get into skirmishing and start playing. With it's tough lightweight design, it's a great choice for those run and gun speedy players, looking for something that will perform in both a CQB and larger scale environments. The CM.517 comes with everything you need right out of the box, allowing you to get stuck and start taking objectives and downing opponents. With a huge array of potential improvements thanks to the 20mm quad rail system, you can customise to your hearts content going forward. A cheap and easy way to start playing, the CM.517 has something for every new player.
Features
- Great starter AEG
- Four point 20mm RIS / RAS handguard
- Full length 20mm top rail for sights and scopes
- Accepts a huge variety of attachments and accessories
- Six position sliding adjustable stock
- Rubberised butt plate
- Rear wired alloy gearbox
- Windage / elevation adjustable ironsights
- Tool-less removable rear ironsight
- Bayonet lug
- Accepts a wide variety of Airsoft STANAG magazines
- Textured and finger ridge pistol grip
- Mock charging handle, forward assist and bolt cover
- Charging handle pulls back bolt cover to reveal the Hop-up unit
- Front sling loop and rear sling plate
- Polymer adjustable Hop-up unit
Package Includes
- CM.517 M4 Combat Machine
- 300rnd High Cap magazine
- Sling
Special Instructions
Please note, the buffer tube sling plate on the CM.517 is constructed from polymer and we do not recommend using it as it may not be up to the task of supporting the weight of the AEG, especially with a single-point sling. We recommend using the sling slots on the stock and pairing them with the front sling point on the front sight/gas block to mount a two-point sling.
Recommended Battery
For this rifle we recommend a 7.4v LiPo with Tamiya connector in stick or crane stock configuration.
Specification
General
|
Assault Rifle
|
---|---|
|
Yes
|
|
Yes,
No,
|
|
Approx. 330fps ± 10%, using 0.20g BB
|
|
Yes
|
|
Yes
|
|
Magazine
|
|
Starter
|
|
Li-Po - Never Leave Charging Unattended
Li-Po - Only Use Approved Chargers
Li-Po - Charge in a Fire Safe Area
|
Weight and Dimension
|
Approx. 1.7kg
|
---|---|
|
70cm
|
|
78.5cm
|
Construction
|
Black,
Tan ,
|
---|---|
|
No
|
|
Full Polymer receiver, pistol grip and stock
|
|
Polymer
Alloy
|
|
Polymer
Alloy
Aluminium
Steel
|
Weapon Specific
|
Electric
|
---|---|
|
None
|
|
AR, M4 / AR-15 / M16, Assault Rifle, M4/AR-15 AEG,
|
|
Long Gun Magazine, Assault Rifle, M4 / AR Platform,
|
|
Safe
Semi Automatic
Full Automatic
|
|
Trigger Lock
|
|
Right Handed
|
|
Standard
|
|
1:1
|
|
0.25g
|
Hop-Up
|
Yes
|
---|---|
|
Rotary
|
|
Behind mock Bolt cover, accessible with the charging handle pulled and held back.
|
Furniture
|
|
---|---|
|
20mm RIS / RAS
|
|
Sliding
|
|
5 Position
|
|
Aperture Iron Sight
|
|
Stock , Loop ,
|
Barrel
Outer Barrel Length (in)
|
11''
|
---|---|
|
Male
|
|
CCW (Counter Clockwise)
|
|
14mm
|
|
6.03mm
|
|
295mm
|
Magazine Specific
|
AEG
|
---|---|
|
Approx. 300 Rounds
|
|
Fill Window
|
|
Top
|
|
Top
|
Electric Gun Specific Information
Gearbox
|
V2 Gearbox
|
---|---|
|
Rear Wired
|
|
No
|
|
No
|
Motor
|
Standard
|
---|
Battery Specific
|
Mini Tamiya
|
---|
Included Battery
|
Ni-Mh
|
---|---|
|
8.4V
|
|
1100mAh
|
Compatible Battery
|
Ni-Mh
|
---|---|
|
Crane
|
|
9.6v
|
Product Testing Data
|
Tested using 0.2g BBs
|
---|---|
|
10/03/2016
|
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.
This table should be used for reference, and cannot be used to check one weight against another, as the weight of the BB affects the power.
In order to check if the BB can be used with your replica chronograph using the weight you wish to use and then compare it against the table.
Every time you change weights you will need to re-chrono and check against the table. This is not a conversion chart between weights.
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 |