Everything you ever wanted to know about buying an AR15 Lower Receiver

There are endless options of AR-15 Lower Receivers. Ready Gunner details out the features that you should pay attention to when choosing what lower to use when you build your next (or first) ar15. Shows Spikes Tactical Stripped and Spikes Hellbreaker, Sentinel Firearms, Tegra Arms, Mega Arms, Rock River, LMT (Lewis Machine & Tool) and Aero Precision.