GunsNstuff
Sharpshooter
Anyone have the CMMG RDB barrel & BCG & also use the Mean Arms pmag conversions? My AR9 has been a 7.5" blowback with adjustable pistol brace and a Glock mag lower, but I've recently replaced the lower with a standard lower and I have the Mean Arms pmag conversions. The problem I'm having is the tiny feeding cone on my barrel. It sometimes loads when I charge the pistol by hand, but when I fire it, the next cartridge gets jammed into the vertical flat surface of the barrel which jams the bullet deep into the case, ruining the cartridge and jamming the weapon.
I thought I'd take a Dremel and add a feed ramp to the lower portion of the barrel so these rounds will be forced to point up and hopefully load into the chamber. My barrel doesn't have an index pin, so I bought some 1/8" stainless rod, drilled an 1/8" hole in the barrel, heated the barrel and froze the rod, then pressed it into the hole in the barrel. Now I have an index pin and tightening the barrel nut won't spin the barrel at all, so I know where to work on adding the feed ramp.
As fun as this work is for me, it's not fun to drive the 35 miles to the property where I shoot to see if a mod I did made the gun work or not. I started thinking that while I think the price of $475 is ridiculous for a BCG and 8" barrel from CMMG, it would make the gun lighter weight and probably make it function properly again since CMMG sells completes AR9s with the Mean Arms mag conversions. It may be a buy once, cry once situation, but since I've never fired one of these radial delayed AR9s, I'm wondering what others think about them. Are they so much better than standard blowback AR9s that the cost is justified, or is it mainly hype? Is the CMMG system pretty reliable? My AR9 with Glock mags is very reliable. Like I'd bet my life on it reliable, even with hollow points. After my lower and mag swap, I wouldn't bet a dollar on its reliability. Does anyone have a blowback AR9 that uses the Mean Arms pmag conversions, and it's working reliably for you?
I thought I'd take a Dremel and add a feed ramp to the lower portion of the barrel so these rounds will be forced to point up and hopefully load into the chamber. My barrel doesn't have an index pin, so I bought some 1/8" stainless rod, drilled an 1/8" hole in the barrel, heated the barrel and froze the rod, then pressed it into the hole in the barrel. Now I have an index pin and tightening the barrel nut won't spin the barrel at all, so I know where to work on adding the feed ramp.
As fun as this work is for me, it's not fun to drive the 35 miles to the property where I shoot to see if a mod I did made the gun work or not. I started thinking that while I think the price of $475 is ridiculous for a BCG and 8" barrel from CMMG, it would make the gun lighter weight and probably make it function properly again since CMMG sells completes AR9s with the Mean Arms mag conversions. It may be a buy once, cry once situation, but since I've never fired one of these radial delayed AR9s, I'm wondering what others think about them. Are they so much better than standard blowback AR9s that the cost is justified, or is it mainly hype? Is the CMMG system pretty reliable? My AR9 with Glock mags is very reliable. Like I'd bet my life on it reliable, even with hollow points. After my lower and mag swap, I wouldn't bet a dollar on its reliability. Does anyone have a blowback AR9 that uses the Mean Arms pmag conversions, and it's working reliably for you?