I figured it makes the most sense to put this here, but if not then let me know/mods move it.
I have a stock LMT MWS and am finally moving to a state which allows me to buy a suppressor, so I'm trying to figure out what to get. I've been doing a bit of research and think I have it narrowed down to either an OSS HX QD 762 or Dead Air Nomad L. This will be a bench gun so weight and length aren't major concerns, but sound suppression is and being an MWS back pressure is as well.
I'm considering the QD762 because of its fantastic reputation for low back pressure; apparently to the point that I wouldn't even need to swap in any parts such as heavier buffers. On the other hand, I've heard that their sound suppression is sub par. The Nomad L stands out to me as providing pretty darn good sound suppression without the cost of too much back pressure. Problem is that I don't know how much back pressure there is, and while I'm willing to tweak the recoil system, at this time I'm not willing to install an adjustable gas block or similarly modify the gas system.
Can anyone provide any further insight into the above? I.e. how well the QD762 suppresses sound, how much back pressure the Nomad L produces, any ideas on mitigating back pressure in an MWS, and/or if the difference in sound suppression between these two options is splitting hairs.
Another suppressor that caught my eye is the CGS Hyperion (full size, not k), but I haven't been able to find much data on its back pressure. If anyone can help out there, and/or recommend other suppressors I'd appreciate it.
I don’t have hands on experience with the OSS, nor do I own a Sandman, but this is my humble opinion of someone who is currently in the same situation as you and has been testing and researching.
Backpressure and suppression seem to share an inverse relationship. If it suppresses well chances are it’s higher backpressure. If it’s low backpressure chances are it’s louder than the competition. The suppression levels are all relative because it’s only a couple dB usually. There are some exclusions to this and we will get to that eventually.
There are 2 ways to moderate gas:
1.) Buffer weights
2.) Gas Moderation
Gas moderation can be achieved with an adjustable gas block, smaller gas tube, or adjustable gas key.
Having shot the LMT with everything from XH to H2 and factory gas tube to 100% suppressed gas tube I can say that for me, with my cans, there is no combination that I find acceptable in a mid length system, granted it runs fine and is up to the intended accuracy standards.
I personally believe that running a LMT MWS suppressed requires an AGB. I am on this step of the process and waiting for a barrel from Lothar Walther with a rifle length gas system.
If I was starting out and looking at suppressors I would pick something that manufactures recommend on their large frame gas guns. FN developed theirs around Surefire. HK recommends OSS and they don’t have an adjustable gas system on the MR762. The sandman K I shot on my MWS was better than any of my cans.
Exception is over bored cans, so anything greater than 30cal. I have run a 338 ultra and SiCo hybrid and it certainly brings the gas levels down compared to a 30cal can.
I hope this helps you in your search for a can for the MWS