|This product is pretty great. No worries, if you're AR-15 or variant has a magazine well.. then this'll fit.
Granted, with this on your rifle you're not going to be 100% combat ready. BUT; if your hiking, storing your AR or variant in your safe or have your rifle stowed in your car or truck then this product is great. For 3 bucks you get about 99% more protection for your lower and internals. (Dust, debris..etc..)
It isn't made out of a cheap plastic, it seems to be a rubber or plastic rubber mix, either way it stretches around the magazine well and stays on.
If you've got an AR, buy one or two. If you don't like it.. you're only out a few bucks. =]|