For those with a 6.8 SPC AR15 or anyone considering them there is finally a budget friendly magazine source. I ordered up 4 new C-Products mags from Midway for $14 each + shipping! C-Products as a company failed several years back but has been resurrected with completely new ownership and so far seem to be dedicated to bringing a quality affordable mag to market.
I only pulled one of the 4 I purchased out of the package to test but it loads and locks in as expected and seems to feed correctly though I haven't taken It to the range yet. Definitely not as nicely constructed as a PRI mag but it didn't cost $45 either!!!