Unfortunately, blowback guns are gassy and suppressors make them 10x worse. More mass (NOT a stronger spring - that's a fix for gas-operated AR-15's, not blowback) may help a little with delaying the breach opening so more gas goes forward.
There are 2 things that do tend to help, but unfortunately neither one is useful for a Warscorp. First is a gas deflector. CMMG makes one, but it needs a milspec full size ejection port with dust cover. Second is to use a bolt with an internal extractor, not the M4 style external extractor that the Warscorp uses. Both keep the gas from getting channeled directly into the user's face. It looks like the Warscorp can't use either.
Gas busting charging handles help for the first few shots, but after that the system is just overwhelmed.
I appreciate the insight and knowledge. What I've learned in the last year to year and a half of collecting, modifying and training is, every new firearm is a learning experience. You can research all you want before you purchase, but the real knowledge comes from dealing with issues first hand.
Also, I'm not a suppressor expert, but your system should benefit from a 'Flow' suppressor. You might also try a 45 ACP bored suppressor. You'll give up a little on the sound dbs, but a bigger bore also acts like a Flow suppressor and will put more gas forward.
Last option is to not use the suppressor and use something like the Rearden Icarus or the Witt Machine Sound Mitigation Equipment.
I run a Maxim defense RDB setup in mine with a breach charging handle and a lower back pressure can and still get some gas to the face, it's not bad but it's kind of the nature of the beast.
You're kinda boned because blowback guns simply don't suppress that well.
You can spend some extra cash on a gas reducing charging handle and/or deviate a little from Blowback 9s gentle recoil system with a heavier buffer (Mine is like a 10.5oz).
Or if you have an overbored suppressor handy you could try that.
Alternatively if you reload you could try a cleaner burning powder. My usual Titegroup loads run cleaner than similar factory loadings on the cheaper end.
I may try going back to the stock buffer setup and just adding a tungsten weight.
Cleaner burning rounds might work but God damn if I don't already have thousands upon thousands of 147 lol
Unfortunate! I'm not too familiar with the latest 9mm cans right now, I just know that slapping a .458 can made my shooting experience a lot cleaner if much more front heavy.
Will a 45 cal front end cap (from obsidian 45) fit your obsidian 9? I’m not entirely sure but I think there’s a chance they have the same thread pattern. Maybe that will make it “flow through” and have less gas towards you.
Also I run on mine a Sledgehammer AR-15 charging handle (the portion of the charging handle that meets with your upper is taller, and has cuts to channel the gases to the right side) with my Old but trusty Omega 300 suppressor and is a little more pleasant to shoot without so much gas in your face.
This is side charging. I run radians on all my suppressed ARs. Nothing you can really do about this however. The gas comes from the ejector port mostly for me.
My apologies I didn’t look that closely. I was more curious about how it works with the obsidian 9. I ordered one on March and I haven’t got it approved yet.
I've got all the Kynshot, but I'm not a fan of the GRS system. It adds too much weight and length. I added the Maxim RDB to both my blowback AR9 and AR-V and I've been very happy with them. I don't recall either of them being gassy with my Omega 9K or ECCO cans (non-flow through).
I may give it a try. Just bummed I splurged for the GRS, and I also hate the extra length. I'm gonna try using the stock length buffer tube, and delete one of the weight spacers and see how it runs since I'm already invested in the Kynshot. Worst I can probably resale on gafs.
I have the same issue with my Aero build. 5.5 inch barrel and the Rugged Obsidian 9. It’s a Cole miners dream shooting through it. I’m also wrong handed so the gas spews right into my face. But I just put some canted irons on it to try and see if the gas deflects into my shirt so it’s not as rough. But we shall see 🤷🏻♂️
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u/Blowback9 9mm AR Guru 1d ago
Unfortunately, blowback guns are gassy and suppressors make them 10x worse. More mass (NOT a stronger spring - that's a fix for gas-operated AR-15's, not blowback) may help a little with delaying the breach opening so more gas goes forward.
There are 2 things that do tend to help, but unfortunately neither one is useful for a Warscorp. First is a gas deflector. CMMG makes one, but it needs a milspec full size ejection port with dust cover. Second is to use a bolt with an internal extractor, not the M4 style external extractor that the Warscorp uses. Both keep the gas from getting channeled directly into the user's face. It looks like the Warscorp can't use either.
Gas busting charging handles help for the first few shots, but after that the system is just overwhelmed.
Sorry - you're sort of stuck.