SLR SR26 AK Series Muzzle Brake 26x1.5 LH Thread Black. Works on M92/85 rifles as well as others. 26mm x 1.5mm LH. Single Port Design. 4140 Heat treated Billet Steel. Melonite heat treat. Awesome performance in a small package stops muzzle rise completely. Proper port and bore size for maximum effectiveness for 7.62 Ammunition. Compatible with all 26mm Gas Blocks with 90deg and offset index pins. Specifications for SLR SR26 AK Series Muzzle Brake 26x1.5 LH Thread: Manufacturer: SLR Color: Black Caliber: 7.62x39mm Threads per Inch: M26x1.5 LH Features of SLR SR26 AK Series Muzzle Brake 26x1.5 LH Thread: 26mm AK Series Muzzle Brake. Works on M92/85 rifles as well as others. 26mm x 1.5mm LH. Single Port Design. 4140 Heat treated Billet Steel. Melonite heat treat. Awesome performance in a small package stops muzzle rise completely. Proper port and bore size for maximum effectiveness for 7.62 Ammunition. Compatible with all 26mm Gas Blocks with 90deg and offset index pins. Package Contents: SLR SR26 AK Series Muzzle Brake 26x1.5 LH Thread SLR MD-SR26: SR26 AK Series Muzzle Brake 26x1.5 LH Thread Black