![]() ![]() ![]() We had some thin-flanged ones get out that shouldn't have and they don't always play well with others, but that was a small batch and you'd be lucky to find one. ![]() The current production stuff that is golden has the tool features that pass all the way through (rather than being pocketed like yours), with the flange thickness being almost identical to what you have. That KeyMo adapter pictured is from before the recent batch issue, so you're golden there. If it goes on the mount and locks down tight without any wiggly motion then you know you're good to go. Just make sure the KeyMo adapter is fully tightened against the shoulder of the back of suppressor. It doesn't affect everyone, but there's enough of a percentage that we recognized the need to fix it after the one batch. If you have one of these, just call our CS group and they'll have you return it and you'll get the newest rev in return. , and the flange is thicker which helps with improved blast chamber spacing. They'll have a thread lead before the 1.375-24 threads also to help them mesh better with the threads in your suppressor-even with some salts in there if they show up again. The thicker ones are already shipping from what I know. We took the opportunity to thicken that flange too, as it turned out it was draft form that the shop picked up rather than the final release. Everybody is suffering, but we got hit hard with this batch of KeyMos. ![]() It turns out every gun company out there is pushing parts into the few nitriders in the nation and they're quality is dropping. It was rushed into production and we've had some massive issues with nitride salts in the threads. There were just a few random combinations people noticed that happened to work without using the QD Adapter Ring.That thin flange KeyMo did have some issues. Regardless of all that, the easiest thing to remember is that all KeyMos from Gen 1 through Gen 3 regardless of KeyMo muzzle device choice (and all other 1.375x24 Omega pattern QD mounts) fit the Helios QD no problem when you use the QD Adapter Ring. Gen 3 KM (does not fit without using QD Adapter Ring) Gen 2 KM (fits without using QD Adapter Ring) Gen 1 KM (does not fit without using QD Adapter Ring) Here are some pictures of the different KeyMo generations: As an example, people that had thread fitment inssues with the Gen 2 KM (which fit) sent their Gen 2 KM back to Dead Air to be replaced/fixed, but they were then sent the Gen 3 KM (which didn't fit) as a replacement for the Gen 2 KM because the Gen 2 KM was no longer being made at that time, so when they tried to assemble the Gen 3 KM and saw it didn't shoulder up in the Helios QD they were confused. 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). 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. ![]()
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