CTR Cheek Rest | Keltec RDB

I was excited to get this installed, but once I had it on I noticed a huge design flaw - with just the slightest amount of pressure towards the front of the cheek riser, it will pop the locking tabs out of the slots that are supposed to hold them in place. Having that happen repeatedly while shouldering the rifle is a pain. It's basically unusable, so I'll be going back to the original cheek rest. The metal bars need to either be machined thicker, or there needs to be a little shelf underneath the slots to keep the riser in place. I tried three different Magpul risers, and all of them had the same problem. It's a shame that this doesn't work as intended, because the design is great aesthetically, but the functionality isn't there yet. Maybe a version 2 will correct this, but for now I'm out $45.