Quote:
Originally Posted by 35NCO
I would caution that you should do more research on what’s available if you have serious concerns about explosive environments. Most of my knowledge on the subject is open source, but a few thoughts come to mind. (Best Weapon, Cartridge and Suppressor combination for explosive environments today, would be an awesome study for someone to do. If it’s not out there now?)
I assume you are talking about 5.56? In this situation given your needs you might want to look at specific loads vs. barrel length to give you the most complete powder burn. I say this because the unburned powder can build up in the suppressor and actually cause more sparks and unexpected hot spots. This can be true for the chamber and ejection area as well with SBR’s. It would also apply to keeping your weapon and suppressor as clean as possible to help mitigate that threat.
Some of the older studies I have read for explosive environments were usage of 9mm MP5’s with AWC MK9 or Gemtech MK9K suppressors. At the time those were some of the best suppressors for those environments due to the volume, design and cartridge. Today I am sure there may be things out there that are much better. Unless there is some really interesting blast baffles that trap more now, I would think in theory a wipe and baffle design with high volume and limited shots would be the best answer as long as you had 100% powder burn.
As far as pistons go, I would be hesitant on bolt on/clamp on kits like Adams arms because ( I would fear) they could hammer themselves off if not properly mounted. I question how much a beating they can take. I think they make sense if you can pin them to the barrel like a regular site block. There is another company that has an add on that was even simpler (osprey?), although I cannot attest to its quality. I do know, that it uses the factory M4 pinned site block.
Other considerations would be what brands have been known to run well suppressed. The change in impulse sometimes requires a different setting on piston guns. If it’s a non-adjustable kit that may cause problems for you in basic reliability and tailoring it to custom powder loads.
Otherwise I would look at well known brands like LWRC. Often, LWRC uppers are available on Gunbroker and sites like that on a regular basis. Don’t hesitate to call any company you are wondering about first though. Often times LE/MIL sales are not always advertised. If you want to spend big money, you can always get an HK416 upper. ($2 -3-4k? for LE/MIL) Also, agree about the above posted brands.
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My best friend is the armorer at Osprey. I just got off the phone with him, he told me that Osprey has not offered a piston driven AR15 based rifle. When we spoke he was in the room with Grange, who also confirmed that Osprey has never built a piston operated rifle.