Replace the stock springs with Bore Buddy replacement springs (https://borebuddy.com/product/15-22-and-gen2-cmmg-mag-springs-pack-of-3/) and you'll...

This offers the best functionality with the Catch22 bolt catch. With the 15-22 magazine and adapter, you will have the exact same functionality as a standard. 223 AR.

This magazine fits in a standard AR mag well without any shim. The spring tension is a bit weak though and so you will need a lightened bolt catch ...

BDM makes a lot of great magazines, and the Gen III mags will feed well in your AR. Unfortunately though, they will not engage the Catch22 after the last round is fired.

Because the back of the follower can't reach the bolt catch, the bolt catch won't be engaged automatically. The extended part of the follower will ...