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Posted: 8/6/2026 9:41:05 AM EDT
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Hello, I'm new here, this forum is awesome and I'm glad I'm able to have it as a resource! Apologies for any poor formatting or similar errors. I'm in the process of buying a 6.5" 300 BLK Ar pistol, specifically the CMMG Zeroed Banshee, sadly its the unsuppressed version because I'm from Massachusetts, but the fight to abolish the NFA seems to be picking up steam so I'm hopeful lol. My main question is what would be the best buffer system to replace the stock one with. I want to cut down on some of the recoil that I'm sure it'll have being so short. Since its unsuppressed I'll probably only run supers through it. Subs, from what I've read, seem to be difficult to run unsuppressed, and my hope is to one day run a suppressor with subs and supers so I'm trying to build it for that scenario. From my research either a VLTOR A5 or the BCM MK2 buffer system or a Kynshot hydraulic buffer seem like the way to go for overall recoil reduction. My question stems around what weight for the buffer and/or what spring for either of those. Also if a braided spring would perform well, in addition to keeping the "twang" from the spring down. I run a VLTOR A5 in my 16" LWRC 5.56 and its been great However, I know I dont know everything so I wanted suggestions for buffer systems or other recoil mitigating technologies. The Zeroed Banshee comes with an AGB so that should help tune it just right. I'm also open to scrapping the CMMG Banshee altogether if there's a VASTLY superior system. However I am an absolute sucker for the integrally-suppressed Honey Badger look. I also wanted a bag gun, so this seemed like exactly what I'm looking for. I'll be putting a law folder on it as well. Additionally, if someone wanted to convince me that 300 BLK isn't a good caliber and that another could serve a similar purpose, I'm open to hearing that too. But 300 BLK seemed like the way to go for the versatility in a short barrel. Sorry for the essay, and thanks for any help |
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| I have the KynShot hydraulic buffer system on my 300 Blackout SBR with 8" barrel and it is really softer shooting. I have one on my primary 5.56 mid-length and it made a very noticeable difference there too so I add on on my 308 AR too, then my Glock and soon my 365 Sig once they are available. There is also another guy that has an exclusive for their pistol guide rod system for 1911s that I am interested in getting for my CMP 1911. |
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Joined:
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I'm learning now that the braided spring isn't recommended for 300 BLK but flat wires are. I think i want a kynshot buffer but I'm not sure if I should go with the standard or the lower power one. I'd like to not have to get a different one if/when I can get a suppressor as I'd like to shoot suppressed supers through it as well. Would the standard one be too strong for unsuppressed supers? Or maybe I should try the standard one and get both a weaker and stronger flatwire spring to switch between for suppressed fire? |
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Originally Posted By Dstruktr: I'm learning now that the braided spring isn't recommended for 300 BLK but flat wires are. I think i want a kynshot buffer but I'm not sure if I should go with the standard or the lower power one. I'd like to not have to get a different one if/when I can get a suppressor as I'd like to shoot suppressed supers through it as well. Would the standard one be too strong for unsuppressed supers? Or maybe I should try the standard one and get both a weaker and stronger flatwire spring to switch between for suppressed fire? Hydraulic buffers have way too many drawbacks for me to put them in anything. They are not serious enough that I would push hard for people to avoid them, but if you are trying to make this reliable then I'd go with a regular H2 (or A5 system to smooth it out). If you're just trying to make it shoot softly and are willing to make the reliability compromise to get there, I would probably lean towards the SCS just because I tend to like JP stuff. |
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Originally Posted By Dstruktr: I haven't heard a single bad thing about the Kynshot yet. What are the drawbacks you're talking about? Bolt bounce and overall reliability in cycling take a pretty big hit compared to non-hydraulic systems. I think this also sits well within YMMV territory, but it's pretty easy to find people having issues with them. They tend to leak over time too. In all likelihood, you would never notice the bolt bounce unless you run it on a FRT or FA lower. They can be more sensitive to temperature and debris. Like I said, they're not awful, and they can be very good even - as long as your expectations are in line with reality. Put another way: they're neat, but I don't think you'll ever seem them in a SOCOM gun. |
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Originally Posted By PacificNic: Bolt bounce and overall reliability in cycling take a pretty big hit compared to non-hydraulic systems. I think this also sits well within YMMV territory, but it's pretty easy to find people having issues with them. They tend to leak over time too. In all likelihood, you would never notice the bolt bounce unless you run it on a FRT or FA lower. They can be more sensitive to temperature and debris. Like I said, they're not awful, and they can be very good even - as long as your expectations are in line with reality. Put another way: they're neat, but I don't think you'll ever seem them in a SOCOM gun. Hmm, okay. Having the ability to run it with an FRT is kinda something I'd like to have, even if I'd never get the chance to. Thank you for the input. You say the JP SCS also has reliability issues as well? Is that just in the context of 300 BLK or in general? |
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Originally Posted By Dstruktr: Hmm, okay. Having the ability to run it with an FRT is kinda something I'd like to have, even if I'd never get the chance to. Thank you for the input. You say the JP SCS also has reliability issues as well? Is that just in the context of 300 BLK or in general? I haven't heard anything specific to the SCS, but these are common across most - if not all - hydraulic buffer systems. I would also stress that I am speaking in generalizations, so each independent system/user is likely to have a slightly different experience. |
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Originally Posted By PacificNic: I haven't heard anything specific to the SCS, but these are common across most - if not all - hydraulic buffer systems. I would also stress that I am speaking in generalizations, so each independent system/user is likely to have a slightly different experience. Ok, thanks a lot for the help. Now I'm onto messaging JP Enterprises to see if the Law SCS works with the new Gen-S Law Folder. Heard anything about that? And also, you think just the normal weight for the SCS on this build? |
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Originally Posted By Dstruktr: Ok, thanks a lot for the help. Now I'm onto messaging JP Enterprises to see if the Law SCS works with the new Gen-S Law Folder. Heard anything about that? And also, you think just the normal weight for the SCS on this build? The new Gen-S appears to be functionally identical to the previous (Gen3?) folder, it’s just lighter and slimmer. The plug is identical as far as I can tell. |
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My suggestion based on my experience is to first blast with brake cleaner, wipe clean, oil well, then dry fire at least 1,000 times. Break down again, wipe clean, then test fire it. After firing, then troubleshoot the system. |
Call the tune and let's dance; but beware that the devil is the piper and the tab for that soiree will be hell to pay.
Training&Trigger Time are more important than chasing a hardware Holy Grail
Training&Trigger Time are more important than chasing a hardware Holy Grail
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