Modern Firearms - M4 M4A1
Select a country producer

ColtM4 and M4A1 carbine / assault rifle (USA)

 

Colt M4 carbine, current issue model with removable carrying handle, left side
Colt M4 carbine, current issue model with removable carrying handle, left side

 

Colt M4 carbine, current issue model with removable carrying handle, right side 
Colt M4 carbine, current issue model with removable carrying handle, right side

 

Colt M4 carbine, old version with fixed M16A2-style carrying handle and M203 grenade launcher
Colt M4 carbine, old version with fixed M16A2-style carrying handle and M203 grenade launcher



Colt M4 carbine, current issue model with Trijicon ACOG telescope sight installed over the integral Picatinny rail and M203 grenade launche mounted onto the RIS forend.
Colt M4 carbine, current issue model with Trijicon ACOG telescope sight installed over the integral Picatinny rail and M203 grenade launche mounted onto the RIS forend.



Colt M4 carbine with Mk.18 CQBR upper receiver, fitted with Aimpoint red-dot sight and additional back-up iron sights (BUIS)
Colt M4 carbine with Mk.18 CQBR upper receiver, fitted with Aimpoint red-dot sight and additional back-up iron sights (BUIS)



THOR Global Defense Group TR-15 carbine, manufactured along the lines of US GI M4, but fitted with a number of accessories such as AAC silencer, Vltor rail forend and buttstock, and Trijicon ACOG 4X optical sight
THOR Global Defense Group TR-15 carbine, manufactured along the lines of US GI M4, but fitted with a number of accessories such as AAC silencer, Vltor rail forend and buttstock, and Trijicon ACOG 4X optical sight
image: THOR Global Defense Group



THOR Global Defense Group TR-15 carbine, manufactured along the lines of US GI M4 and equipped with 10.5
image: THOR Global Defense Group

 

Click here to see the the SOPMOD M4A1 kit (54 Kb JPEG, will open in new window)

Caliber: 5.56mm NATO
Action: Gas operated, rotating bolt
Overall length: 838 mm (stock extended); 757 mm (stock fully collapsed)
Barrel length: 370 mm
Weight: 2.52 kg without magazine; 3.0 kg with magazine loaded with 30 rounds
Rate of fire: 700 - 950 rounds per minute
Maximum effective range: 360 m

The Colt company developed various carbine versions of the basic AR-15 / M16 rifle since 1970s. These carbines were intended for all markets - military, law enforcement, civilian. US Military (and some other armies, most notably - Israeli Self-Defense Forces) had adopted the Colt CAR-15 Commando and XM-177 carbines during the 1970s and 1980s. But early in 1990s the old idea of replacing the pistols in the hands of the troops with some more effective, shoulder fired weapon, rise again in the heads of the US Military. In fact, this idea can be dated back to the US M1 Carbine of 1941, but good ideas never die. So, in the 1994, US Army adopted the Colt Model 720 selective-fire carbine (basically, a shortened M16A2 rifle), as the US M4 Carbine. This weapon was intended to replace in service some M9 pistols, as well as some aged M3A1 submachine guns and some M16A2 rifles. New weapon was much more handy and comfortable to carry, than the long M16A2 rifle, so the US Special Operations Command (SOCOM) put its eye on the M4 as a possible universal weapon for all Special Operations community. For this purpose M4 was latter modified with the M16A3-style flat-top receiver with integral Picatinny-type accessory rail instead of the M16A2/M4-type integral carrying handle. This modificatin retained the M4 index. The only difference between the M4A1 and M4 is that its trigger unit of M4A1 is modified to fire full-auto instead of the three shots bursts in M4. Specially for the SOCOM M4A1s US Naval Surface Warfare Center developed a SOPMOD M4 kit, that consisted of the M4A1 carbine equipped with Rail Interface System (RIS) instead of the standard handguards. The kit also includes a variety of the add-on goodies, such as various sights (ACOG 4X telescopic, ACOG Reflex red-dot, detachable back-up open sights), laser pointers (visible and infra-red), detachable sound suppressor (silencer), modified M203 40mm grenade launcher (with shortened barrel and improved sights). The kit also included a detachable front grip and tactical light.

At the present time, the M4 carbine is used as a front-line weapon by US Army, Marine Corps and SOCOM operators in Iraq and Afghanistan. Combat experience with thos weapon resulted in update program, which will, as of now (mid-2010) following steps. First, Army wanted to install heavier barrel to allow more sustained firepower, combined with full-automatic mode of fire instead of 3-round burst, and ambidextrous safety/selector switch. Second stage will see improved rail adapter and a new, improved bolt carrier, and a possible third stage will include change of operating system (most probably, from direct gas to the gas piston). 

At the present time, the Colt company still is the the prime M4 carbine manufacturer for US Armed forces, but many other companies build similar "milspec" weapons for other US and foreign customers, such as government and private security organizations, law enforcement etc. To name just few, M4-type carbines are manufactured by Bushmaster Firearms, Olympic Arms, THOR Global Defense Group and others

Technical description.
The M4 carbine differs from the M16A2 rifle only by having a shorter barrel and a telescoped, 4-position buttstock. The M4A1 is a similar modification of the M16A3 rifle, so for general technical description please refer to the M16 article on this site.


Online Store
 

M16M4AR15 Pistol Grip

AG-43

Amount
Price
1-5
20$
>5
 
Tactical Folding Pistol Grip for-M16M4AR15

AGF-43S
Amount
Price
1-5
40$
>5
 
Collapsible Butt Stock for M16/AR15

GLR-16
Amount
Price
1-5
54$
>5
 
Sniper Stock For M16/SR25

SSR-25
Amount
Price
1-5
190$
>5
 
M4 Aluminum Quad Rail

NFR
Amount
Price
1-5
128$
>5
 
AR15/M16 Rail System

VFR
Amount
Price
1-5
335$
>5
 
AR15/M16 Rail System with A2 carry rail

VFR-A2
Amount
Price
1-5
335$
>5
 
M4 Polymer 3 Rail Handguard

FGR-3
Amount
Price
1-5
48$
>5
 
Double Picatinny Rail

DPR 16/4
Amount
Price
1-5
12$
>5
 
Universal Picatinny Rail

UPR 16/4
Amount
Price
1-5
12$
>5
 
Barrel Single Rail

BSR-1
Amount
Price
1-5
28$
>5
 
Barrel Double Rail

BDR-2
Amount
Price
1-5
38$
>5
 
Dual Picatinny Mount

SBS
Amount
Price
1-5
50$
>5
 
Bayonet Lug Flashlight & Laser Attachment

FBAL:   3"
 - 
1"
Amount
Price
1-5
95$
>5
 
M16/AR-15 LULA™
Loader & Unloader

LU556M16BLK
Amount
Price
1-5
27$
>5
 
M16/AR15 StripLULA™ loader

SL556M16BLK
Amount
Price
1-5
25$
>5
 
M16/AR15 USGI (NATO STANAG 4179) - 20 and 30 rd 5.56 magazines.

BL556USGI30
Amount
Price
1-5
430$
>5