Description
CMMG replacement barrel and BCG kit for 5.7x28mm builds. This 16.1 in barrel kit is designed for assembling into a Mk4/mil-spec AR15 upper for an AR pistol or SBR, using CMMG Radial Delayed Blowback. The kit includes the barrel and bolt carrier group components, and it uses radial delayed blowback operation for last round bolt hold open.
Key details
- Caliber: 5.7x28mm
- Barrel length: 16.1 in
- Radial Delayed Blowback operating system
- Last round bolt hold open feature
- Designed to fit into a Mk4/mil-spec AR15 upper
- Works with a CMMG Mk57 lower receiver, or Mk4/AR15 mil-spec lower receiver with CMMG 5.7 AR Conversion Magazines
Specifications
| Fits | Mk4/mil-spec AR15 upper |
|---|---|
| Part Type | Replacement Barrel and BCG Kit |
| Caliber | 5.7 x 28 mm |
| Barrel Length | 16.1 in |
| Finish | Black |
