Feb 17, 2020 · The Colt Federal Patrol Carbine is an advanced rifle based on Colt's legendary M4 platform adding key accessories as requested by the FBI. It features a new Geissele MK4 M …

Sep 7, 2008 · The USGI M4 Carbine is Colt's model number RO920 and roll marked: Property of US Govt M4 Carbine The USGI M4A1 is marked: Property of US Govt M4A1 Carbine and is …

Mar 17, 2011 · My latest new carbine is my 10th Colt AR which started with my first SP1 rifle way back in 1971, I currently have 4 ponies in my stable, a Match Target HBAR lower with USGI …

Jan 4, 2021 · Was browsing GB the other day and saw where a guy had 5 M4 marked LE6920s. The SN# prefix was CR. He wanted $1200. Seemed like a good deal as the Carbine only …

Apr 5, 2010 · Do the dual heat shielded Colt carbine handguards have the same characteristics as the single shielded ones as described? Yes, this a very good write up by the OP! Edit: I …

Feb 26, 2018 · There are four basic different kinds of the LE6920 M4 carbine with three different roll markings on the left side of the lower receiver. The oldest (which there may be still NIB …

Sep 25, 2023 · I don't know if someone has a timeline of changes to Colt lowers over say the last 20ish years? Lets focus on the 6920 lowers even though I know some of these changes apply …

Jan 16, 2022 · 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, …

Jul 6, 2009 · Is there a specific type of bayonet that is made for a carbine style M4 AR-15? My RRA carbine has a bayonet lug underneath the front site block. It seems to me that the length …

Sep 8, 2013 · Yes, I had a grey A2 Colt upper with M4 ramps, marked m4 in small letters over the gas tube hole. According to Kevin Dockery's 'Weapons of the Navy Seals' the first M4s were …