CMMG Radial delayed bolt with standard reciever

[joedirt199]

Just ordered a bolt and barrel combo as I have some stripper uppers laying around doing nothing. Anyone have any real issues with ejection on a standard reciever? I know they recommend a oversized ejection port for best results. Just looking to do a cheap upper with spare parts and to work with my pistol lower. Gonna get some endo mag conversions with some spare pmags.

[joedirt199]

Well just completed an 8.5" upper with a left over stripped reciever, holosun 510 green reticle. Have some endomags and just need to get out to the range to run some rounds through it.

[nate89]

No personal experience yet, but I'd check the thread over on Brian Enos for info about that. Quite a few guys over there building PCCs with the guard system, and there is lots of good info over there. I do remember at least one person using a standard upper and not having issues, as long as it was the 9mm model, and not the 45. Once again no personal experience, but check over there for sure.

[joedirt199]

There was a decent length thread on ar15. Will look for the one on brian enos as I frequent that one as well.

[joedirt199]

20190926_205300.jpg

Here it is all finished up. Plan to run some mags throug it after uspsa this sunday.

[gaijin]

Interested to hear your thoughts on the Radial Delayed Bolt- does it/is it= softer shooting than the Blow Back guns?

[Jmacken37]

Are you using an A5 buffer system? Amphibian has done some great research on this RDB setup...

http://c3junkie.com/?page_id=538

[joedirt199]

Was using a standard buffer but threw an H weight in to see how it does tomorrow at the range. Have an H2 as well.

[joedirt199]

Ran it with the H buffer and sertled down pretty well. Locked back everytime. Ejection was slightly forward.

[Cashflow]

Have the upper and lower, maybe I can swing the bolt and barrel for Christmas. Looking forward to finally putting mine together. Thanks for posting about your experience!