CMMG MK9 AR-15 Custom Build, 5.56 NATO A1-Style Upper, 16 Inch Chrome-Lined Barrel, Three-Prong Flash Hider
This AR-15 pattern rifle is an assembled build that pairs a CMMG Mk9 dedicated 9mm lower with a retro A1-style 5.56×45 NATO direct-impingement upper. The upper features a Colt-marked chrome-lined barrel, fixed carry handle sights, and short, round CAR-style carbine-length handguards. It presents a distinctive mix of components that will appeal to buyers seeking a vintage-style 5.56 upper on a robust CMMG Mk9 lower. No magazine is provided.
Condition
Overall Condition: Fair condition, showing extensive signs of prior use and handling.
Bore Condition: Good - Clean, well-maintained, minor wear marks.
Rifling: Good Rifling - Intact, well-defined lands and grooves.
Specific Condition Notes: The rifle is structurally solid. There are widespread scratches and blemishes across the exterior. Many areas show scattered rust and pitting. No magazine is provided.
What's Included
- CMMG MK9 custom AR-15 rifle as described
The build combines a CMMG Mk9 dedicated 9mm lower with an A1-pattern 5.56×45 NATO direct-impingement upper. The visible features and markings reflect a 5.56 DI configuration, including the fixed carry handle, A-frame front sight tower, a carbine-length gas system, and short, round CAR-style carbine-length handguards.
The 16 inch barrel is Colt-marked "C MP CHROME BORE 5.56 NATO," indicating a chrome-lined, magnetic particle-inspected barrel. It uses a lightweight pencil profile and is threaded, capped with an open three-prong flash hider.
Sighting is fully iron with the A1-style carry handle rear and an A-frame front sight tower. The furniture follows the classic pattern: short, round CAR-style carbine-length handguards, an A1 fixed stock with trapdoor buttplate and bottom sling swivel, and an A1-style pistol grip. Length of pull is 13.0 inches.
Receivers are 7075-T6 aluminum. The upper operates via direct impingement, and the rifle includes a manual safety. Country of origin is the USA. Please note: no magazine is provided.