San Tan Tactical produces exceptional firearms and components, and their lower parts kit for the AR-15 is no exception. High-quality machining and fantastic design all come together to give you an exceptional quality kit to build out your receiver. Whether you're upgrading an existing rifle or simply wanting to start a build with quality, the San Tan Tactical lower receiver parts kit is the option for you. Each component meets or exceeds MIL-SPEC, but this kit does not include a fire control group or pistol grip.Features: Bolt Catch Bolt Catch Plunger Bolt Catch Spring Bolt Catch Roll Pin Magazine Catch Magazine Release Button Magazine Release Spring Safety Selector Safety Detent Safety Detent Spring Trigger Guard Trigger Guard Roll Pin Takedown Detent Spring (x2) Takedown Detents (x2) Takedown Pin Pivot Pin Buffer Retaining Pin Buffer Retainer Spring Made in the USA