I’m working on an AR .308 build. This is my first. I’ve completed a couple of AR-15 lowers and understand the way that everything should work.
I purchased an Aero .308 lower receiver. I now understand that it is a proprietary M5 lower and not all AR-10/.308 lowers are compatible. Things were too easy with the AR-15 platform.
I purchased a CMMG .308 lower parts kit to start my build. In attempting to build the lower, I realized the magazine catch was too short to extend across the lower body and make the magazine release functional. In addition the pivot pin was excessively tight and gritty when inserted in the lower and the bolt catch screw was short enough I was concerned about its functionality (luckily Aero provided one with the lower receiver).
Where can I purchase a magazine catch compatible with the Aero lower? Maybe I should have purchased an Aero M5 lower parts kit. Got sucked in by a good price. Paying for it now.
Was I a fool to use a CMMG lower parts kit? I installed one in an AR-15 build and didn’t have any issues.
Where can I get a great .308 AR or AR-10 lower parts kit when I tackle my next build?