I had a buddy that had a buddy that had a Magpul grip break off at the screw head and the grip just came off in his hand. I went to my stash of parts and looked at the thickness around the hole where the bolt goes through and it's much thinner than most other grips that I had around to compare it to. I swapped out the grip and re-installed a regular old grip on my 308AR rifle until I can find a better solution to making sure the Magpul grip doesn't crack off on one of mine. I'm sure that Magpul made the grip thinner in that area so that it allows longer items to be stored in the grip but how thin is acceptable? Perhaps a custom metal plate that fits between the screw head and the plastic grip to distribute the weight over a broader area to keep it from cracking?