Colt CR6700A4 20" 5.56 NATO AR-15 Rifle – Chrome-Lined Barrel, A2 Furniture, Detachable Carry Handle
Colt’s CR6700A4 brings the classic 20" service-rifle format into modern civilian production. Built in the USA on forged 7075-T6 receivers and marked with Colt’s current “CARBINE” roll-mark, this rifle mirrors the USMC M16A4 layout while offering the flexibility of a flat-top upper and detachable carry handle. Limited recent production makes it a standout choice for Service Rifle competition, collectors seeking a genuine Colt 20" build, or anyone who values the handling of a full-length, chrome-lined barrel.
Condition
Overall Condition: Excellent – showing only faint signs of any prior use or handling.
Bore Condition: Excellent – clean, mirror finish, no signs of wear.
Bore Rifling: Excellent – sharp lands and grooves.
Specific Condition Notes: Minor superficial scratches and blemishes are present on the exterior surfaces. The bore remains bright and shiny.
What’s Included
- Colt factory cardboard shipping box
- 1× 20-round aluminum USGI-pattern STANAG magazine
- 1× 30-round aluminum USGI-pattern STANAG magazine
- Black web two-point sling (installed)
Colt is one of the few manufacturers still offering a 20" chrome-lined rifle-length AR-15, and the CR6700A4 continues that legacy with a 4150 CMV government-profile barrel, magnetic-particle-inspected bolt, and hard-coat-anodized receivers. The 1:7" right-hand twist stabilizes the full range of 5.56mm projectile weights commonly used in competition and duty applications.
The upper receiver’s Picatinny rail and detachable A2 carry handle let you configure the rifle with period-correct iron sights or modern optics without permanent modification. Standard A2 rifle handguards stay cool during sustained fire, while the fixed A2 stock sets a consistent 13.5" length of pull.
A 1/2-28 TPI threaded muzzle accommodates common flash hiders, brakes, or suppressor mounts, and the rifle retains the proven direct-impingement action with a manual safety selector. Markings include Colt’s “C MP” proof on the barrel and data-matrix code on the lower for easy traceability.
With an MSRP of $1,099, the CR6700A4 offers collectors and competitors a genuine Colt-built platform that bridges classic service-rifle feel with modern modularity.