If I were to say Spartan Mounts had great customer service I would be understating the service I received. The CQB model of the Springfield M1A has a different magazine well. I ordered the M14/M1A and it had fitment issues. Ben of Spartan Mounts worked with me, modified his mount and sent me a prototype that fit perfectly. The design allows a solid mount to the wall and quick access by releasing the magazine. Reasonably priced. I have purchased 5 different styles of Mounts and very satisfied.
It clicks in well and is very securely held in place. Love it!