FWIW it's worth DPMS made a batch of bad mags a few years ago. The ones you have were they bought at the same time? Lastly not sure if it was discussed in this thread previously but the CMMG was designed before the PMAGs were available and thats why we suspect they dont function in these weapons. What magazines does CMMG offer?
I bought a few barrels and bolts from Rainier where I selected the magnetic particle option. I thought"How will I know?" well low and behold they are stamped as such.
The process for most seems to have slowed to a crawl. Demand is high with only a handful of BATFE folks reviewing the paperwork. They sure cashed the checks for the 4 stamps in a timely fashion. I think the ink was still wet.
Bumping this old thread. Six months later Im still waiting on the tax stamp for the suppressor. I have the Wilson Combat TRIM FFHG on order. I'll use a Timney Trigger I have on hand. Still pondering a stock. Im back and forth between a UBR or a M4 SOCOM Modular Stock. Either will need pinned. Alternatively I can pull the CTR off my Colt Sporter, pin it and run the UBR on my Sporter unpinned. The final step will be to pin and weld the AAC muzzle brake to the barrel...stupid laws.