BCM MIL-SPEC CARBINE BUFFER SYSTEM

The buffer tube threads were perfectly clean, so the castle nut went on without any fighting. Everything you need for a complete lower is in the bag, which saved me a second parts order. Solid upgrade for the money.

Installed this on my stripped lower build and everything fit together with zero slop. The carbine tube feels rock solid once torqued down, and the buffer spring slides in smooth without binding. Exactly what you need to finish the job right.

The buffer tube threads were butter-smooth and the whole kit mated up perfectly to my stripped lower, no filing or finagling needed. Everything from the spring to the castle nut feels solid and the carbine tube sits exactly where it should.