Aluminum Linear Muzzle Brake 1/2X28 TPI Barrel Extension Tube For 9mm .22LR .223 $39.7 Brand Unbranded MPN MZ-1006-L-2+CW2 condition New Aluminum Linear Muzzle Brake 1/2X28 TPI Barrel Extension Tube For 9mm .22LR .223 US Seller.Length: 7.1 Inches.O.D.: 1.24 Inches.Weight: 10 OZ.One Solid Piece Of Aluminum. * CANNOT Take Apart Or Disassemble *No International Shipping.