Aero Precision M5 .308 Complete Lower Receiver is the perfect base for your custom big-bore AR rifle.

Features:

• Works with standard AR 308 components and magazines
• Rear takedown pin detent hole is threaded for a 4-40 set screw
• Bolt catch is threaded for a screw pin (no roll pin needed)
• Integrated trigger guard
• Selector markings will work with 45, 60 or 90 degree safety selectors
• Accepts Battle Arms Development short throw safety selectors, but will work with any standard selector
• No gap with aftermarket pistol grips

Includes:

• M5 Lower Receiver - Anodized Black
• M4 Stock - Black
• A2 Grip - Black
• Mil-spec Lower Parts Kit
• Carbine Receiver Extension
• .308 Carbine Buffer and Spring