The AAC 90T Ratchet Taper Muzzle Brake mounts are for the SR-7 and SR-5 suppressor line. All AAC Blackout muzzle brakes are machined from high strength aerospace steel alloy and coated in a hard, durable, corrosion resistant SCARmor finish.

Features :

• 5.56mm-1/2x28 SR Series Only
• Rocksett and Shim Kit Included
• Not Compatible with Older Spring Mount (18-Tooth) or Ratchet Mount (51-Tooth) Sound Suppressors