Home > Catalog > CMMG Barrel and BCG Kit 4140CM SBN Drop in Barrel 5.7 x 28mm 8" Barrel Black

CMMG Barrel and BCG Kit 4140CM SBN Drop in Barrel 5.7 x 28mm 8" Barrel Black

ITEM NUMBER:

CA57D88C3

UPC:

810097502406

BRAND:

CMMG

MFG PRODUCT #:

57D88C3

SPECIFICATIONS

BARREL LENGTH:

BARREL MATERIAL:

STAINLESS STEEL

BARREL TWIST RATE:

1:9

BARREL TYPE:

THREADED

BRAND:

CMMG

CA PROP 65:

YES

CA PROP 65 CHEMICAL:

LEAD

CALIBER:

5.7X28 FN

COLOR:

BLACK

COMPLIANCE ITEM TYPE:

UPPER PARTS

FIREARM ACCESSORIES WEAPON FIT:

AR-15

MUZZLE THREAD:

1/2-28

DESCRIPTION

The 8" 5.7x28mm Barrel and BCG Kit is perfect for building an AR pistol or SBR in 5.7x28mm using CMMG’s 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 and still provides essential features like last round bolt hold open. CMMG’s 5.7x28mm Barrel and Bolt Kits are designed to be assembled into a Mk4/mil-spec AR15 upper and work with either a CMMG Mk57 lower receiver or Mk4/AR15 mil-spec lower receiver (when using CMMG 5.7 AR Conversion Magazines).

California Proposition 65 WARNING: This product can expose you to chemicals including lead, that are known to the State of California to cause cancer, and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov