CAR-15/M-4/.223 SMG,9mm Rifle Service Pak $79.97 Springs to return rifle to original factory condition. All springs are factory specification strength with the exception of the action (or recoil) spring which is extra power. 30454 Only 1 left in stock CAR-15/M-4/.223 SMG,9mm Rifle Service Pak quantity Add to cart Categories: AR-15, Wolff Gun Springs Related products High Standard Bolt Carrier Group 5.56, new, made in USA. $499.00 AR15/M-16/M4/CAR15 RP Trigger Spring $9.97