It's a shame that the liberal politicians in Colorado ran Magpul across the border into Wyoming. On the flip side the town of Cheyenne is doing great with lots of companies settling there taking advantage of the low tax rates and reasonable state regulations.
I have nothing against Magpul it's just that a magazine is a magazine is a magazine to me especially when it comes to synthetic AR magazines. I believe I have 3-4 different brands including a couple of magpul's, they all work.
I wouldn't buy metal AR magazine's they are not all created equal plus they're very cold when hunting in the winter. The first ones I ever got were Colt 20rd metal mags, they had sharp edge that scratched the heck out of the cases when they were fed into the gun, filing it to a 45degree angle helped. From a reloaders standpoint the polymer mags are great.