Originally Posted By: smirkerColt is the only maker that offers a life time warrenty on their recievers.Their products are made to mil-spec standards.They are put together the way they are designed to be assembeled.They dont use recivers from a crappy foundry.A Colt is a AR-15,everything else is a knockoff.Remember,it is a military weapon first,and a sporting arm second.
Also remember that the Military uses the rifles from the manufacturer that makes the lowest bid too. 
I have a Colt AR 15 that I bought from a guy with more money than sense. He bought it new and when he got tired of it he almost gave it to me! I bought the Colt with 2 complete uppers, all kinds of parts, 2 stocks, and about 200 rounds of ammo for only $375! Had I not knowed the guy and knowed for a fact he bought it new I would have sworn it was hot! The original 16" Colt upper has a 1 in 7 twist and is horrible on accuracy with the size bullets I perfer so I ended up buying a DPMS 20" flattop upper with a 1 in 9 twist. So now I have a hybrid AR and the 20" DPMS upper shoots great. The Colt lower I have was made with a sear block to prevent people from easily making them into fully auto. The block also is in the way of installing aftermarket trigger assemblies. You can grind them out but is hurts the value of the rifle. I have now ordered one of the Plumcrazy ARs from Brasshound so I can put my Colt back in the safe.
