CMMG Barrel and BCG Kit 57DBC33, 5.7X28MM, 5 in Barrel, Black, Fits AR Rifles 57DBC33

The 5" 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).

5" 5.7x28mm Barrel

5.7x28mm Bolt Carrier Group

Black

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Hinterland #:	204808
UPC:	810097502390
Barrel Length:	5"
Fit:	AR Rifles
Caliber:	5.7X28MM
Manufacturer:	CMMG
Manufacturer part #:	57DBC33
Type:	Barrel
Sub Category:	Barrels
Color:	Black