Sprinco AR-15 carbine buffer springs are made from high quality Chrome Silicon wire stock which is used in a variety of applications from Formula One to motor valve springs which can see up to 15,000,000 compression cycles in a single race. This makes it the perfect choice for a carbine which will see far less cycles than that over it’s lifetime. In order for this carbine buffer spring to retain its strength, Sprinco heat treats, shot peens, and treats each spring with a proprietary formula that retains spring efficiency for as long as you have your rifle. The Sprinco extra power carbine buffer spring is a great option to improve the long-term reliability of your AR-15.

Features:
ASTM Grade A877 Certified Valve Quality Chrome silicon Wirestock
Heat Treated, Stress Relieved and Dual Stage Shot-Peened post winding (Our springs really ARE shot-peened)
Impregnation / Plating with Re-Micronized Molybdenum Disulfide formulation
Hard plastic tube packaging for protected transport and easy storage (Tubes make great storage compartments for all sorts of gear)
 
Options
Red - Extra Power ~ 25% Increased Power
Blue - Enhanced Power ~ 15% Increased Power
Red / White - Intermediate Power ~ 7.5% Increased Power
White - Standard Power Carbine (Mil-Spec)
Green - Standard Power Rifle (A5 Buffer Tubes and A1 / A2  Fixed Stocks)
Yellow - Reduced Power ~ 20% Reduced Power