Tacfire Buffer Retainer Pin and Spring Features The Tacfire buffer retainer pin and spring is manufactured from stainless steel the same type of wire used in piano construction giving the spring consistent tension and a longer service life inside the lower receiver. That material choice reduces the metallic twang some AR-15 shooters notice when firing a small but noticeable improvement in how the rifle sounds and feels during a string of fire. Designed specifically for 223 Rem and 5.56 caliber AR-15 rifles this part is a direct fit replacement for the factory retainer pin and spring assembly. Keeping a spare set on hand means a worn or lost retainer pin does not take a rifle out of service for long. This listing includes a 10 pack giving armorers range staff and builders enough parts to service several rifles or keep a reserve supply in a range bag or tool kit. The buffer retainer pin and spring are small parts but they play a direct role in keeping the buffer assembly seated correctly during cycling. Because the components are stainless steel rather than standard carbon steel they resist corrosion better in rifles that see frequent use or humid storage conditions. For any AR-15 owner performing routine maintenance this Tacfire 10 pack is an affordable way to stay stocked on a commonly needed small part. TacFire Buffer Retainer Pin and Spring Specifications Manufacturer: TacFire Model: Buffer Retainer Pin and Spring Type: Buffer and Buffer Parts Compatible Hosts: AR-15 Material: Stainless Steel Color: Silver Quantity: 10-Count Available At: GrabAGun