oops, delete

Stupid Bushmaster.  That thing is a POF Predator.  It isn't easy to install because you have to remove your front site/gas block, flash hider/muzzle break, delta ring, etc.  It is a very nice rail system, though, in my opinion.  You can get more info on it by looking up the patriot ordinance factory predator p4.  I have no idea why all of Bushmaster's accessories are made by YHM or POF now.  They have the ARMS SIR in their catalogue; I'm surprised they don’t call it the "BMAS RERF" (Really expensive rail fore end) or something.