For those who own R22s and are not happy with the factory mag catch here is what I did:
I simply milled a new catch from steel and used SKS stock spring (the one that pops the trigger group out). The mags don't wobble anymore and the feeding is consistent. It requires drilling a hole in the back of the mag catch cavity to secure the other end of the spring.

I simply milled a new catch from steel and used SKS stock spring (the one that pops the trigger group out). The mags don't wobble anymore and the feeding is consistent. It requires drilling a hole in the back of the mag catch cavity to secure the other end of the spring.