As some of you may know I like delayed blowback setups and have been running the CMMG RDB Guard / Banshee setups since they first came out. My friends and I have been plagued with ejector spring failures. I went to a custom fixed ejector but am leary on the longevity since the slot required will run by the cam pin hole and weaken the bolt. It works but I have already broken two bolts running them that way. The CMMG Dissent in 9mm is also the RDB system but finally has a fixed ejector but is in a proprietary upper that is a side charger and does away with the buffer tube and is no longer full auto capable. I know a lot of people hate the buffer tube but I personally love it as it allows you to fine tune by leveraging all the aftermarket buffers and springs. I personally think the shorter you go, the less smooth although some will argue the more cool you look but I don't care about that. When the CMMG RDB first came out, I wasn't really that impressed. Smoother than an un-tuned straight blowback yes but MP5 smooth - no way. Maybe 60% there. A flatwire spring and hydraulic buffer gets it like 90% there but with a nicer cyclic rate. Going to a .40SW bolt in 9mm got me to match the MP5 but at the cost of worrying if / when the bolt will break. My new hybrid setup gives me the best of both worlds. Although I'm only about 1K into each configuration but it is very promising so far.
My website has a lot detail in regards to the build list: https://c3junkie.com/?page_id=1733 .One thing I didn't add is that in Phase II, I'm using a 7.5" Odin works stainless straight blowback barrel that I converted to an RDB barrel. Post sample full auto lowers were used and Endomags. Buddy also ran it fine with a RDIAS and should work fine with a RLL with the CE mods.
My website has a lot detail in regards to the build list: https://c3junkie.com/?page_id=1733 .One thing I didn't add is that in Phase II, I'm using a 7.5" Odin works stainless straight blowback barrel that I converted to an RDB barrel. Post sample full auto lowers were used and Endomags. Buddy also ran it fine with a RDIAS and should work fine with a RLL with the CE mods.
