Colt CR6920 16" 5.56 NATO AR-15 Rifle – Chrome-Lined M4-Profile Barrel, Mil-Spec Build
The Colt CR6920 delivers Colt’s current-production civilian M4 package in a lightweight, fully Mil-Spec-compatible platform. Built in Hartford with 4150 CMV chrome-lined steel, a 1:7 twist, and Type III hard-coat anodized 7075-T6 receivers, this rifle offers the durability, parts interchangeability, and handling characteristics serious shooters expect from the Colt name.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Condition: Good – Clean, well-maintained, minor wear marks.
Bore Rifling: Good Rifling – Intact, well-defined lands and grooves.
Specific Condition Notes: This firearm is in great shape. There are some minor and superficial scratches and blemishes present. Bore is clean and shiny.
What’s Included
- Magpul MBUS Gen 2 flip-up rear sight (installed)
- 2 × Magpul PMAG Gen M2 30-round magazines
Colt’s CR6920 retains the M4-profile, step-cut barrel complete with the under-cut for M203 mounting, preserving true Mil-Spec geometry while keeping weight down at the muzzle.
The 16.1-inch 4150 CMV steel barrel is chrome-lined, phosphate-finished, and high-pressure/magnetic-particle inspected, ensuring service-grade longevity and corrosion resistance.
Upper and lower receivers are machined from 7075-T6 aluminum, finished with a Type III hard-coat anodizing that resists abrasion and matches current U.S. military standards.
A 4-position collapsible stock on a mil-spec buffer tube, an A2 pistol grip, and a double heat-shield polymer handguard provide familiar ergonomics while keeping the rifle adaptable and comfortable.
Sight configuration is ready for immediate use, combining a forged F-height A2 front sight base with bayonet lug and a Magpul MBUS rear, while the flat-top upper receiver offers full Picatinny rail space for optics.