I have a model 1 sales 9mm kit built around a DPMS lower. the doesn't take the Cprod mags that they sell but it is flawless with Colt mags. their prices aren't the best when you factor in that many of their kits are priced without the bolt carrier groups.
with that said, model1 sales and blackthorn are about as low quality as you can get as far as durability goes. palmetto state armory would be a much better bet.
ignore my complete lack of capitalization. I still have no problem correcting your grammar.
I never said half the stuff people said I did-Albert Einstein
You can't believe everything you read on the internet-Benjamin Franklin