California delivery
Description
The 5 5.7x28mm Barrel and BCG Kit allows you to build an AR in 5.7x28mm using CMMGs patented Radial Delayed Blowback operating system. Unlike typical direct blowback systems, Radial Delayed Blowback not only reduces the weight in your BCG but it results in less felt recoil than a straight blowback system. CMMGs 5.7x28mm Barrel and Bolt Kits are designed to be assembled into a mil-spec AR15 Upper and work with either a CMMG Mk57 lower receiver or with a standard Mk4/AR-15 lower receiver (when using CMMG 5.7 AR Conversion Magazines).
Specifications
| Caliber / Gauge | 5.7 x 28 mm |
|---|---|
| Barrel length | 8" |
| Overall length | 8" |
| Color | Black |
| Sights | No |
California compliance
California requires this item to be delivered through a licensed dealer when it ships to a California address. Outside California it ships direct to you.
CMMG 57D88C3 Barrel/BCG Kit 5.7x28mm 8″ Black Chrome Moly Steel
Out of stock right now
This one is out at both our shop and our warehouse. We can still source it — text us at 707-287-6180 and we'll tell you what it takes to get it in.
We can source almost anything. Tell us what you're after and we'll tell you what it takes to get it in.





