The Tiger Rock Inc. LPK-09 223/5.56 Rifle Lower Parts Kit is engineered for precision and reliability, ideal for custom builds. This kit excludes only the fire control group, providing all essential components like the magazine catch assembly and safety selector lever, ensuring optimal assembly performance. Magazine Catch Assembly with Button and Spring Single Safety Selector Lever Bolt Catch Assembly with Plunger, Spring, and Roll Pin Complete Detents and Springs Set Takedown & Pivot Pin Detents and Springs Build your perfect 223/5.56 rifle with unmatched quality and performance.