Cmmg Receiver Extension Kit – W/mil-spec Buffer Tube Ar-15

This cmmg receiver extension kit comes with a carbine buffer assembly and a carbine action spring.
Rails: None
Type: Receiver Extension Kit
Firearm Type: AR Platform
Firearm Model: AR-15
Material: Aluminum/Steel/Polymer
Finish: Black
Adjustment Type: Collapsible
Positions: 6
Tube Included: Yes