CMMG Barrel and BCG Kit 16.1in 4140CM SBN 57 x 28mm 57D0476
$499.95
CMMG Barrel and BCG Kit 16.1in 4140CM SBN 57 x 28mm 57D0476. 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...