Our M5 (.308) lower parts kit helps you to build a custom .308 AR from the ground up. Mil- spec dimensions and coating ensure the highest quality and correct component interface. – This lower parts kit does not include the fire control group or pistol grip. – Features: – Aero Precision M5 (.308) Complete Lower Parts Kit – Our custom takedown and pivot pins are made to work with our M5 lower. They will work with DPMS-pattern lowers as well but will stick out further. – Includes: – Takedown/pivot Spring – Takedown/pivot detent – M5 .308 Takedown pin – M5 .308 Pivot pin – M5 .308 Bolt Catch – Bolt Catch Spring – Bolt Catch Buffer – Bolt Catch Roll pin – Safety Selector – Safety Selector Spring – Safety Selector Detent – Buffer Retainer – Buffer Retainer Spring – Magazine Catch Body – Magazine Catch Spring – Extended Magazine Catch Button