Precision Armament Extra AK-47 Crush Spring. These AK Handguards from Precision Armament feature unparalleled muzzle stability for the utmost in control and canting. With an advanced installation system the Precision Armament Severe-Duty AK-47 Crush Spring provides a rock solid fit and streamlined alignment. When you need a reliable load the Precision Armament AK-47 Compensator Crush Spring provides a cleaner more effective shot. Specifications for Precision Armament AK-47 Crush Spring: Manufacturer: Precision Armament Color: Black Fabric/Material: HTSR 416 sStainless Steel Bar HRC 26-32 Gun Model: AK-47 Precision Armament M4-72 AK-47 Crush Spring: Unparalleled Muzzle Stability Advanced Installation System Superior Durability Package Contents: Precision Armament AK-47 Crush Spring 1 spring (made up of two connected rings) What firearm models does the manufacturer say Precision Armament AK-47 Crush Spring is compatible with? The manufacturer says that Precision Armament AK-47 Crush Spring is compatible with AK-47Precision Armament A04023: Extra AK-47 Crush Spring