SPECS : - Diameter: 1.5 - Overall Length: 6.5 - Length Added: 5.1 when using included Minimalist Brake 4.1 when using longer devices - Weight: 11.8 Ounces - Materials: High strength high temperature corrosion resistant 17-4PH Stainless Steel - Attachment: DUAL-LOK Mounts - DB Rating: (135DB) 11.5 Griffin MK1 (134DB) 16 Griffin MK1 - Finish: High Temp Cerakote - Full Auto Rated: Yes - FEATURES : - Utility patents pending - Wear free mounting system requires no consumable parts - Taper lock interface ensures security and accuracy - ACME thread provides speed of attachment - Locking ring incorporates 3 anti-rotation teeth to eliminate inadvertent loosening - 120 effective positions ensure a rock-solid suppressor mount and provide extremely low POI shift - 17-4 stainless steel & 718 Inconel - Laser welded tubeless design - Patent pending flash reducing and flow optimized end cap - DUAL-LOK Minimalist Brake 1/2x28 5.56mm (.22 cal) Included - wrench flats on muzzle devices - Collar Nitrided black for increased surface hardness corrosion and wear resistance - Suppressor body H900 heat treated and Cerakoted - Perpetual Lifetime Warranty