I recently got black aluma grips for my milspec, and they went on really tight. It took some "convincing" (aka: using a hammer and my free midway catalog as a cusion) to get them on there. I took them off again and putting them back on was much better, but still not as easy as other grips. When I first got my old houge grips I had trouble getting them on as well (except since they were rubber they allot were easier than the aluminum). Is this normal? Or so I have a slightly out of spec gun?