Building up one of Aero Precision's M5 .308 AR lower receivers? Well, you'll need all the small bits to build a functioning lower, but let's be real. You're not going to go full mil-spec with this lower receiver, especially since most AR-15 drop-in triggers also work for the AR .308 lower. So why pay for what you won't use? That's why this Aero Precision AR 308 M5 Lower Parts Kit doesn't include a fire-control group or a pistol grip. The kit will also work on DPMS-pattern lowers, but the takedown and pivot pins will stick out further. Here's what you'll get:

• 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