Flatline Kit

The ultimate upgrade kit to crush recoil. VPRS-15, T-2 buffer, and to top it all off an R2 muzzle brake.

VARIABLE PITCH RECOIL SPRING. The evolution of buffer springs for ARs. No more trying to figure out what spring you need, this is the only one for your ar platform. The variable pitch design substantially reduces felt recoil by breaking up initial impact from the round being fired and progressively slowing the bolt carrier down acting as a mechanical cushion. It works phenomenally in 9mm blow back systems, and 300 BLK as well.

The ONLY AR variable pitch recoil spring on the market, cooked up by our friends at Cook Spring Co. Patented!