JMAC Customs Bravo Extended Blast Shield

JMAC Customs Bravo Extended Blast Shield JMAC Customs Bravo Extended Blast Shield BDS-37-EXT Overall Length: 4.0" Weight: 5.5oz Thread Pitch: 1.375-24 Material 17-4ph Stainless Steel Finish: Black Nitride JMAC Customs Bravo Extended Blast Shield. The BDS-37-EXT was co-developed with the RRD-360-24F-KM RRD-369-26F-KM series of muzzle devices with external threads. This blast shield threads over 1.375-24 threads and diverts the blast forward, reducing side blast/concussion. Grab this cool muzzle today!