Our OTB (over the barrel) muzzle devices interface with our OTB Silencers The RSTA and SPR. This two-piece welded design will be sure to impress your friends. Automated welds provide aesthetically pleasing and rugged design and functional characteristics. The Paladin R muzzle brake is integrated into this modern twist on a Griffin classic. R implies the reverse braking motion that kills recoil and keeps your shots on target. Enjoy. - Length: 4.15 - Material: 17-4 PH SS - Weight: 4.2 ounces - Attachment: 1/2x28 or 5/8x24 threads - Finish: Black Oxide - Free of wear prone geometry - 17-4 PH stainless to withstand hard use - Lustrous black oxide finish - Griffin Laser Logo Marked - Industry Standard thread pitches - Shim set Included - Compatible with SPR and RSTA Silencers