Should be the same. I have a MOE on my BCM upper which has a triangular end cap and it's very tight. Same goes for my Daniel Defense as I said earlier. Looks like it would fit my ArmaLite but I haven't tried it. Should work for you.
The biggest issue with assembling an AR isn't so much getting the parts together right - it's getting the right parts together. You'll remember the quality of a gun long after you forget how much you paid for it.
US Army 1966-69, VFW Life Member, Retired Geek
Last edited by Quentin; 06-18-2012 at 07:12 PM.