6920 roll marks through the years > Colt > AR15

The Sporter M4 Carbine was the first change to the roll marking of the original Colt''s Law Enforcement Carbine. I got mine new in March 2011, no date on plastic birth bag,

2025 Oct 12

M4A1 SOPMOD Block II clone picture thread

The M4 is a conventional forces weapon system, and is totally separate from the SOPMOD program and SOF modifications, though they were "inspired" by the SOPMOD

2025 Aug 05

ar15

Firearm Discussion and Resources from AR-15, AK-47, Handguns and more! Buy, Sell, and Trade your Firearms and Gear.

2024 Jan 08

Benelli M4 vs Beretta 1301 > General Discussion > AR15

Previous Page / 4 Next Page [ARCHIVED THREAD] - Benelli M4 vs Beretta 1301 (Page 1 of 4) Home / General / General Discussion

2025 May 22

Standard Issue M4 Configurations

My last issued M4 in Iraq, 2008-09 in an Army Infantry company was Colt M4 KAC Rail system Matech BUIS Aimpoint "M68" (M4) Airtronic M203 railed leaf sight PEQ15 PSQ18

2024 Feb 17

M4 vs. M4A1 Visual Distinctions > AR Discussions > AR15

Quoted: Can anyone report how a Colt M4 is marked vs. a Colt M4A1 in US service? For example, on the fire selector, I do know the M4A1 is marked "SAFE-SEMI-AUTO"

2024 Apr 27

Barrel life expectancy....the truth! > AR Discussions

Another tells wifey that his barrel is worn out because he really wants a new M4 profile barrel, if you know what I mean. Other factors include the type of ammo, how "hot" that

2024 Dec 09

Army M4 qualification tips > General Discussion > AR15

When zeroing the M4 at 25m, set the BDC to 6/3 +2. Make all your elevation changes on the front sight so the BDC will work. Center your group in the lower half of the

2025 Aug 30

Official M4A1 USASOC URG-I and NSW URG-I and Clone

Quote History Originally Posted By joglee: Official part list. Geissele Mk16. Geissele ACH. DD 14.5" MID-LENGTH CHF BARREL. DD MK12 gas block. Surefire SF4P. Standard

2026 Feb 27

For those of you who can''t mount a bayonet on your 16" > AR

Most M4 and heavy barrels do. Pencil barrels step down to about 0.610-0.615" diameter. So, you couldn''t use standard base journal sizes like you suggest. (Yes, you could

2024 Feb 23

View/Download M4 inverter solar [PDF]

PDF version includes complete article with source references. Suitable for printing and offline reading.