Ops Inc. 2-port military SPR brake, thread protector, and collar. Was mounted on an SPR upper I bought from MSTN a couple of months ago, but the wife is pregnant and I need the money more than I need this brake. It's had about 50 rds shot through it, but the matte black Gunkote finish is still 99%. $225 for all above shipped Priority Mail anywhere in the lower 48 states. E-mail AShooter@ktc.com if you're interested.