Yankee Hill Machine Co sRx Mini Muzzle Brake, 5/8-24, Compatible with sRx Low Profile Adapter, Attaches to Suppressors with 1-3/8"x24 Thread Pitch, Black Oxide Finish YHM-4401-MB-24
Yankee Hill Machine Co sRx Muzzle Brake, 1/2-28, Compatible with sRx Low Profile Adapter, Attaches to Suppressors with 1-3/8"x24 Thread Pitch, Black Oxide Finish YHM-4405-MB-28
Yankee Hill Machine Co sRx Muzzle Brake, 5/8-24, Compatible with sRx Low Profile Adapter, Attaches to Suppressors with 1-3/8"x24 Thread Pitch, Black Oxide Finish YHM-4405-MB-24