Colt AR-15A2 Government Carbine R6520 Pre-Ban 5.56 NATO, 16 Inch Lightweight Barrel, A2 Sights, GC-Prefix, Fiberlite 2-Position Stock
This Colt AR-15A2 Government Carbine (R6520) is a pre-ban example from the late 1980s–early 1990s, identifiable by its GC-prefix Government Carbine marking. It features the desirable 16 inch lightweight pencil barrel with 1:7 twist, fixed A2 carry handle sights, and period-correct shaved bayonet lug. The barrel bears Colt C MP markings, and the upper shows the C MB forging code. It comes with the original box, manual, sling, eight magazines, and an installed GG&G accessory block on the front sight base.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Overall Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: There are instances of light scratches and blemishes present.
What’s Included
- Original box
- Colt Safety and Instruction Manual
- Black nylon sling
- 6x 30-round magazines
- 2x 20-round magazines
- GG&G front sight base accessory block (installed)
The R6520 Government Carbine combines a forged aluminum receiver set with a 16 inch lightweight/pencil-profile barrel and carbine-length gas system. The fixed A2 carry handle includes the A2 rear sight with 8/3 elevation drum, brass deflector, and round forward assist, matched to an A-type front sight post in a fixed front sight base.
The barrel is Colt-marked "C MP 5.56 NATO 1/7," denoting proof/MPI and a 1:7 twist. It is threaded with an A2 flash suppressor and retains the period-correct shaved bayonet lug found on many commercial Colts of the era. The upper receiver carries the "C MB" forging code.
Furniture is true to the Government Carbine pattern: a fiberlite two-position collapsible stock, A2 pistol grip, and CAR-length ribbed handguards. Controls include a manual safety (Safe/Fire). Capacity is 30+1 with compatible magazines.
This carbine is a pre-1994 configuration tied to the GC-prefix Government Carbine line and reflects a discontinued, late 1980s–early 1990s setup. An installed GG&G accessory block on the front sight base is the noted custom addition.