There is nothing wrong with the RRA 9mm platform.
[...]
The is a Hahn block. Notice the feed ramps.
The Hahn feed ramps are certainly prettier, but all that necessarily means is that they're over-engineered. My RRA mag block feeds first time every time, has done over a thousand rounds with perfect function. I use the RRA plastic 30/10 rounders. My upper is a Colt.
As for the guy who has "decided to avoid all RRA stuff completely" on the basis of some internet posts (he doesn't even own anything by RRA!), that's silly. RRA stuff works fine. If you're unhappy with your mag block, send it back for repair / replacement. As soon as you start bending and dremelling, you're on your own as far as support from the vendor.
Maybe your mag catch is off spec? Maybe the mag block is off spec? Maybe your lower is a bit off? Maybe the mags aren't quite right? Maybe all four, and you have fallen victim to tolerance stacking. You just don't know - so call the vendor.




















































