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Posted: 4/29/2025 10:06:02 AM EDT
[Last Edit: rzrsedge][Edited]
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While not a Form 1 build I thought this would be the proper place to discuss this kind of work and suppressor design/theory My first pistol can was a Silencerco Octane .45 that's basically left to sit or be used on a lever gun now that I have much better options. The blowback, and noise for the shooter, on semi auto hosts is just not worth it with the Octane. I had been planning to send it to Ecco at some point but with them out of the game now I've been thinking about what I could do myself I remember seeing a member here talking about drilling some vent holes in their blast baffle or maybe even the first 2 baffles but I haven't been able to find it again. I've also wondered if going to a double clip would help, I noticed the Ecco Canine uses a dual symmetrical clip and is very impressive for it's size, it's more pleasant for the shooter than my Octane .45 is. I'm open to suggestions, I'm not a master machinist, but I have the mill and indexing head that would make adding some vent holes or a second clip fairly simple. Obviously I only get one shot at this with my baffles, so I'd like to feel pretty confident I'm headed the right way! |
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A Form 1 approach might be something like the Resilient RSP where the first two baffles have a large coaxial space that likely vents downstream. That can is no longer on Resilients webpage, but pics of baffle stacks are here: https://www.thefirearmblog.com/blog/2023/01/07/resilient-suppressors-rs9-rsp/ |
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I've had my Octane 45 since SWR was still in business. I would not say it has a lot of blowback, but your experience obviously varies. Are you using the piston w/ the outer slot? Have you ever tried different weight recoil springs? If you want to add some radial holes, go for it. You can try 6-8 1/8" just inset to the outer edge of the baffle face. If it works, but not enough, do another baffle. Ecco uses cones. Radials are rarely, if ever, dual clipped. Griffin offers an upgrade to their Flow baffles for the Octane45. About the cost of a stamp. |
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Originally Posted By User55645: I've had my Octane 45 since SWR was still in business. I would not say it has a lot of blowback, but your experience obviously varies. Are you using the piston w/ the outer slot? Have you ever tried different weight recoil springs? If you want to add some radial holes, go for it. You can try 6-8 1/8" just inset to the outer edge of the baffle face. If it works, but not enough, do another baffle. Ecco uses cones. Radials are rarely, if ever, dual clipped. Griffin offers an upgrade to their Flow baffles for the Octane45. About the cost of a stamp. I have tried a Rugged piston without the Osprey slots, and other suppressors don't have as much blowback on the same guns, so while a recoil spring might help some it is also in the baffle design. Griffin Armament even offers a Silencerco Octane baffle upgrade service along with their own Resistance models that claims to reduce blowback. I think it is a pretty common complaint. (ETA I see you covered the Griffin part  )I think the holes you are describing is pretty much what I remember seeing posted from a member here that modified his Octane, but I can't remember how I came across that thread. |
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Originally Posted By KalmanPhilter: A Form 1 approach might be something like the Resilient RSP where the first two baffles have a large coaxial space that likely vents downstream. That can is no longer on Resilients webpage, but pics of baffle stacks are here: https://www.thefirearmblog.com/blog/2023/01/07/resilient-suppressors-rs9-rsp/ I have their RS9 and it does help with backpressure on PCC'S, haven't tried it on a handgun, it is not very practical for that. They should have the RSP replacement out sometime soon which might be interesting. That exact design might not be very practical to adapt into my existing Octane, but I could get close to that idea maybe by drilling some vent holes or slots in the blast baffle. That was my redneck engineering guess at what I need to do anyway!
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Originally Posted By rzrsedge: I have their RS9 and it does help with backpressure on PCC'S, haven't tried it on a handgun, it is not very practical for that. They should have the RSP replacement out sometime soon which might be interesting. That exact design might not be very practical to adapt into my existing Octane, but I could get close to that idea maybe by drilling some vent holes or slots in the blast baffle. That was my redneck engineering guess at what I need to do anyway! If I were going to add a vent hole to the periphery of radial baffles I’d try alternating position with the first one below the clip, the following baffle a hole above the clip, the third back below the clip, the 4th above, etc. This is an attempt to create cross flow in each pair. As an alternative Griffin ports their eco flow baffles with crescent mill cuts at the baffle edge in 4 or more places. Presumably this promotes off-bore flow along the edges of the tube. |
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Originally Posted By KalmanPhilter: If I were going to add a vent hole to the periphery of radial baffles I'd try alternating position with the first one below the clip, the following baffle a hole above the clip, the third back below the clip, the 4th above, etc. This is an attempt to create cross flow in each pair. As an alternative Griffin ports their eco flow baffles with crescent mill cuts at the baffle edge in 4 or more places. Presumably this promotes off-bore flow along the edges of the tube. I saw those cuts when studying their pictures and didn't realize they went all the way through, I incorrectly assumed they were just for indexing baffles together (and wondered why they went so overboard with them) and didn't zoom in! |
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