In my continuing saga to get less gas from a B&T APC9K I asked B&T their best option (I also acquired several others to test like the Huxwurx and have already tested several like the majove9)
and the recommendation was the M9 which comes with a new 3 lug adapter called SQD.
Its pretty decent in terms of attachment, push straight down and its on, push a button and its off. But when I stuffed an alignment rod down to test it was centered just fine, but even the very slightest amount of pressure on the can like literally one finger push and it was not aligned. I thought to myself this is a baffle strike in the making. So I asked B&T and they say its designed that way to reduce carbon issues and it won't be a problem.
SO me being me started switching around all of the 3 lug mounts I have and looking at the deflection. It was a bit scary as all of them can easily with a little pressure show contact with an alignment rod. Sure some are way way better than others, but they all had the issue.
Does anyone have any thoughts on how much is too much. For the record my Obsidian 9 has the most rounds and with the rugged 3 lug it seems mid pack on deflection and I've not had any issues with it.

Yep, they all do this from all the reading and discussions I’ve had. They don’t do it when you’re shooting, though, or at least, the spring tension nominally keeps things aligned. This is why you never brace a can off something when shooting, but especially anything on a tri lug mount.

Are you familiar with Bixler style tri lug mounts? Hansohn Brothers makes one I guess on request, though they don’t advertise it. I wish someone offered one as a standard production item. They’re a tri lug mount that’s a solid as a modern taper mount when fully tightened up.

Curious:

Am I correct in understanding that if shooting using some sort of support like a table top and the suppressor contacted the support surface, the can could be deflected enough to cause a baffle/end cap strike?

Added: I believe that P220 Smudge answered my question, but to be sure—?

I don’t think Hansohn Brothers is making the Bixler tri-lug mounts any more. I think Shaw Armaments is doing them currently.

quote:

Am I correct in understanding that if shooting using some sort of support like a table top and the suppressor contacted the support surface, the can could be deflected enough to cause a baffle/end cap strike?

I am absolutely certain that if you rested this B&T SQD can on something like a barricade you would get a baffle strike. With complete confidence as I've used barricades enough to know the pressure you have. Other surfaces I would be less clear.
I'm looking into the shaw mounts. Out of stock at the moment.

Thanks for the clarification/confirmation. Another of those informational tidbits I had never heard of, and certainly would have never suspected.

I gathered every 3 lug adapter I had with the idea of trying to measure the deflection in some systematic way. But that turned out to be harder than I thought, so that's for another day.
But I can say with confidence having tried them all back to back that the least amount of play you can get is using a B&T hub RQD mount. Its effectively zero. Now it is not anything like the others in terms of easy on/off, but it fixes the flex problem.

An interesting development here is Rugged has announced a bixler style 3 lug mount hub mount. That's pretty modestly priced IMO. I haven't heard boo from Shaw Araments on theirs.
I've ordered one to try but it seems they are not yet really shipping.

quote:

Originally posted by hrcjon:
An interesting development here is Rugged has announced a bixler style 3 lug mount hub mount. That's pretty modestly priced IMO. I haven't heard boo from Shaw Araments on theirs.
I've ordered one to try but it seems they are not yet really shipping.

Hopefully you didn’t pay the $150 that Rugged was asking. There are places on the net showing about $100 or less on gun deals. I ordered one from Black Market Arms for $103, and got a shipping notice today.

I did not. But I haven't got a shipping notice either. Maybe you'll be able to test it before I do. The B&T that I know is the best of the ones I've tested is $200 so if this is good at half that its a bargin.

Got my Rugged Bixler style 3lug mount today. Test fitting it to a couple of guns, it seems to fit fine with zero wobble. It’s a mostly internal mount, like a SiCo low profile 3 lug mount, unlike other Bixler mounts that are external and add length to the can. The big test is going to be whether it gets carbon locked on the muzzle and you end up unscrewing the can from the mount instead of loosening the mount from the muzzle because both are lefty loosey.

I put the Rugged RU3 on my CAT MOB and gave it a run on my MPX today and actually liked it a lot. Went on and off pretty easy and didn’t come loose from the can or the muzzle device. After having to disassemble my Resilient 3 lug mount to lube the springs, I like the simplicity and zero maintenance of this Bixler style mount. Didn’t expect I’d like it that much, and would probably end up going back to the spring type 3 lug mount fairly quickly, but I think I’ll keep it on for a while.

Thanks for that. Why would you go back to a spring mount?