Aero Precision M5 (.308) Stripped Lower Receiver 99 bucks at Arm or Ally

Aero gets shit on on the Internet but their LFAR receivers are pretty good quality. The only real negatives are the weight and proprietary pivot/takedown pins in the lower. The uppers have flat receiver faces and consistent fit.
 
Aero gets shit on on the Internet but their LFAR receivers are pretty good quality. The only real negatives are the weight and proprietary pivot/takedown pins in the lower. The uppers have flat receiver faces and consistent fit.
I love them for home builds, only downside is weight but otherwise they've been great for builds