![]() ![]() This is a great option if you want to occasionally use your suppressor without sacrificing performance on the gun when it doesn't have a muzzle brake device attached. It gets expensive quickly if you want to use your suppressor on multiple guns. $250 for the adapter and about $100 for the brake. The key micro brake is what your newly adapted cgs helios (using the keymo adapter) would mount into. The keymo qd adapter is what actually screws into your cgs helios. Something to keep in mind here: like the ymh kurz kit, you actually have to purchase two separate items: a dead air keymicro brake and the dead air keymo adapter. Total cost for the adapter and brake is about $150, and each individual brake is going to be about $75.įor most of us, this is the option I would choose and the one I chose. This is great if you want to mostly keep your suppressor on your guns but don't want to deal with the hassle of constantly removing/replacing the brakes from direct threading. The only caveat is that it limits what brake options you can have, since the overall length of the adapter is tiny. I strongly recommend watching this video to get more context. This is the best option for keeping a low-weight QD approach with the shortest overall length of brake. ![]() I eventually found the ymh kurz adapter for sale as a separate item and also the YMH mini QD brake. It essentially gives you more length and thats about it. This is essentially an adapter that attaches to your mounting system of choice's adapter (Confusing, right?). Most of the newer dead air brakes don't require this. There's only one use case and that's if there's sizing issues on the muzzle brake and mounting system you use. Don't let it confuse you going forward like it confused me. Online searches recommended a keymicro and keymo mounts (do i need both?) or the ymh kurz kit (sold out/discontinued).Ī note on the CGS QD Adapter: this is somewhat a red herring and quite confusing. I ended up eventually buying an ar pistol and removed the brake that came with it and just decided to direct thread it and making sure to use wrench to tighten up the direct thread mount - strongly recommend reading the guide that comes with the helios on installing this so you don't damage the threading on your barrel. I wasn't able to remove the brake on my gun - it turns out the brake is well-locked into place using loctite and requires a special tool to remove the specific brake I have. For instance, I had a surefire warcomp muzzle brake that allows QD Mounting for surefire suppressors on my AR and thought the QD adapter would work fine with the surefire system. A lot of the online content doesn't seem to be helpful to new folks getting into NFA. When I first purchased it, I was stumped on how to actually mount it. I bought the CGS Helios QD a few months back and I've finally been able to shoot it while it's in jail at my local gun store. Here are the updated PEW Science Rankings.ĬGS Helios QD 5.Hey guys - wanted to share my experience as someone new to suppressors and QD mounts as well as provide some information for those that are trying to figure out how to actually choose muzzle devices/qd mounting systems. This is part of an ongoing internally-funded PEW Science research study.Ĭheck out for the Suppression Rating. PEW Science is incredibly pleased to be able to showcase the performance of the Helios QD, this iteration of Hyperion technology, and the MK18, in a way never seen before. Thank you to CGS for always supporting the effort. Again, this is differing flow divergence, across platforms, in action.Ĭan a silencer perform better than another silencer on a platform, and then have a role-reversal on a different platform? Apparently, yes. Vented end cap performance of this silencer is also interesting - you lose a lot less performance than you did on the 20-in. We are seeing gas flow divergence as a function of not only internal silencer features, but also as a function of combustion parameters. ![]() We are just scratching the surface of the influence of various parameters with this technology. What happens when the bore is even bigger? What happens when your bore gets as large as 0.375 inches and you add an outer annulus? How does the 5.56x45mm cartridge combustion behave, especially from a barrel half as long as it should be (the MK18)?Įxtremely interesting results challenging analysis and some wild conclusions. You've seen a few 30 caliber silencers on the MK18 already. Both solid and vented end caps are evaluated. Review 6.66 - Today we examine the high fidelity test results for the CGS Helios QD in the supersonic flow regime supersonic XM193 55gr 5.56x45mm ammunition was used in the test, fired from the 10.3-in barrel MK18 automatic AR15 rifle. 5.56 data publication with the MK18 continues! ![]()
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