I know its probably been asked 100 times, whats the pro's and Cons on the Grendel? Reason i ask is i picked up some brass of of a friend of mine and got couple hundered pieces of grendel brass. So instead of sell the brass i thought why not build a Grendel and put the brass to good use. Now i have plenty of AR's can never have to many. But i dont have a grendel so my question for the masses is do i call AA and buy a upper? Or do i build one? I know in the past some folks had trouble building their own 50 beowulf which is alot simpler now but i dont want the grendel to be a nightmare to build when i can pick one up already built .