Yes, the Cmmg, Inc AR15, Ambi Magazine Catch is compatible with your Stag Arms AR10. The magazine catch, magazine spring, and magazine release button are all interchangeable between the AR15 and DPMS AR10 platforms.
Yes, the Cmmg, Inc AR15, Ambi Magazine Catch should work fine with an Aero Precision M5E1 receiver.
The Cmmg, Inc AR15, Ambi Magazine Catch will work with the Geissele Maritime Bolt Catch on either a billet or forged receiver.
Yes. The Cmmg, Inc AR15, Ambi Magazine Catch will work in the 45ACP Banshee lowers.
Do you have an actual AR-10 or a DPMS pattern AR-10?
The magazine catch in the Armalite AR-10 features a unique design that makes it incompatible with the AR-15 or any other AR model. (Standard AR-15 magazine catch will fit DPMS style AR-10)
Yes, it fits M4E1 Lower Receivers