4C AUG 13x1LH KeyMount - JMac Customs LLC

The best of both worlds! Our super effective RRD4-4C muzzle brake comp with KEYMO suppressor mount! These are designed to install with provided shim kit on

4C 14-1LH - JMac Customs LLC

4C FAL Inch 9/16x24 KeyMount - JMac Customs LLC

4C 14-1LH Slim - JMac Customs LLC

4C 14-1LH - JMac Customs LLC

JMac Customs 4C 14-1LH Slim 4-Port Muzzle Brake

4C AUG 13x1LH KeyMount - JMac Customs LLC

4C 1/2-28 KeyMount - JMac Customs LLC

4C 1/2-28 KeyMount - JMac Customs LLC

2C 1/2-36 KeyMount (KeyMicro) BLEM - JMac Customs LLC