The cmmg a1 receiver extension and stock kit contains a rifle buffer assembly, rifle action spring and an a1 rifle length butt stock assembly.Combine this kit with your choice of lower parts kit to complete your lower group.
Firearm Type: AR Platform
Firearm Model: AR-15
Material: Polymer/Aluminum
Finish: Black
Tube Included: No
Firearm Type: AR Platform
Firearm Model: AR-15
Material: Polymer/Aluminum
Finish: Black
Tube Included: No
