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 / Gauge5.7 x 28 mm
Barrel length8"
Overall length8"
ColorBlack
SightsNo

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.

CMMGFFL for California delivery

CMMG 57D88C3 Barrel/BCG Kit 5.7x28mm 8″ Black Chrome Moly Steel

SKU 184853UPC 810097502406MFG# 57D88C3
Caliber / Gauge 5.7 x 28 mmColor Black

$485.00Out of stock — we can still get it

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.

Text or call — 707-287-6180

We can source almost anything. Tell us what you're after and we'll tell you what it takes to get it in.

$5 flat shipping · free over $150Local Napa pickup