CMMG Builder's Kit Rifle Upper Package - 9mm Luger, 5.5" Barrel
This CMMG Builder's Kit package is centered around a CMMG 9mm upper receiver with a matching CMMG 9mm bolt carrier group and a 5.5" 9mm barrel.
Included with this setup are the buffer tube, buffer, buffer spring, and castle nut, along with a UTG PRO AR15 carbine-length drop-in quad rail system (MTU001), an SB15 pistol stabilizing brace, and a CMMG 9mm 33-round magazine.