Geissele Standard Lower Parts Kit with Grip. Every detail of these kits are engineered to perform to the highest standard possible from the stainless steel firing pin lugs to the precision machined bolt catch splines. These precision parts are manufactured to strict tolerances to ensure tight tolerances within the critical parts of an AR weapon. This in turn will ensure tight functionality throughout the life of the weapon. The precision machined parts included within these Geissele Lower Parts Kits are of the highest quality possible creating tight tolerances over greater part tolerances. These tight tolerances ensure concentricity within critical wear areas giving you the longest service life possible. All Geissele AR Parts are proudly made in specialized factories Specifications for Geissele Standard Lower Parts Kit w/ Grip: Manufacturer: Geissele Color: Black Country of Origin: USA Package Contents: Geissele Standard Lower Parts Kit w/ Grip Geissele 05-987: Standard Lower Parts Kit with Grip