Originally Posted by TheBigness
Please let me know how it works out. where did you find Ar-10 CATCH?
I got mine here:
For mine, the main difference in the two is the ar-10 catch bolt has a slight angle inward. This is what makes it work cause when you place it in the lower and screw it down, it forces the catch to go into the mag slot deeper. I do not have an upper yet but my pmag is locked in there very tightly now.