![]() ![]() What I wrote about on r/NFA was in response to peoples concerns about KeyMo fitment issues due to the different versions of KeyMo that were being released. The newest KeyMo mount (which I'll call Gen 3 KM) had ~.05" of material added back in front of the threads, and that extra material prevents the KeyMo from shouldering in the Helios QD because that extra material bottoms out on the internal taper shoulder of the Helios QD. Fitment issues were also occuring with other manufacturers silencers. We know it's not an issue with the CGS side of the equation since all of our parts are checked with thread gauges, and because they were rechecked when we took the parts back to see what the issue was. ![]() Soon after releasing Gen 2 KM, Dead Air then changed the design of the KeyMo mount again after there were issues reported here and elsewhere of KeyMo mounts not fitting various silencers due to male thread issues on the KeyMo mounts. The Gen 2 KM paired with the KeyMicro brake allowed you to use that specific combination of parts on the Helios QD without using the QD Adapter Ring that's included in the Helios QD kit. 275" of extra material in front of the threads (which I'll call Gen 1 KM). We fully warranty the HELIOS QD on the MAXIM DEFENSE PDX and MDX line of firearms in any caliber, any barrel length, and in both semi and fully automatic firing modes.ĭesigned and manufactured in Artesia, New Mexico USA by CGS Suppressors LLC, a division of CGS Group LLC.Dead Air released a new KeyMo design maybe four months ago, the version with no extra material in front of the threads (which I'll call Gen 2 KM), which replaced the old KeyMo design, the version with. The HELIOS QD has a lifetime warranty and due to the design of the suppressor the serial ring can be removed and welded to another core should the need ever arise. The HELIOS QD is full auto rated with no barrel length restriction and will handle up to and including 300 Norma Magnum. A ported front cap is included to ensure blowback mitigation for left hand shooters or for use with calibers or weapon systems that may be prone to over-gassing. A sealed front cap is provided for the maximum sound reduction possible. The interchangeable rear caps are complimented with interchangeable front caps as well. The HELIOS QD comes with a 1/2×28 threaded rear cap, a 5/8×24 threaded rear cap, and an adapter ring threaded in 1.375×24 to accept a plethora of industry QD mounting solutions. 36 bore significantly reduces back pressure and muzzle flash while also allowing the suppressor to be used with multiple calibers. ![]() The HELIOS QD system was designed to be extremely versatile. The HELIOS QD utilizes a full DMLS 718 Inconel design for maximum strength and extreme durability. By using a taper interface between the muzzle device and the signature suppressor, we ensure the muzzle device threads will not carbon lock. ![]() This unique design allows for peak sound reduction for its size and elimination of the flash signature as well as consistent, minimal and repeatable point of impact shift. The patented “Varying Core Diameter” technology unique to CGS Suppressors is unlike anything the firearms industry has ever seen before. The CGS HELIOS QD is a short, quick attach rifle silencer designed specifically for 5.56mm rifles and carbines. ![]()
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