I got one of those for my mp15 and had to hack it up. Way too big.
rightOuch man. Let us know what they say.
That's a "Hold my beer and watch this" type of moment.
Sorry to hear that. I myself am in the middle of build with one. For me though it has been so far so good. I have been doing a strange combo just to see if I'm good enough gunsmith to make it work. I had an old M16A1 upper lying around, so I decided to marry it to the polymer lower I have. It has been lot trimming, and fitting, but it fits tight, and works great so far.....but I am taking my time to fit it because I am afraid the same would happen.
Wow Ive never seen one split like that, they always need a little persuasion for the LPK to fit just irght but never seen one split. Hopefully they stand behind it.