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Sound Suppressors...

2624 Views 17 Replies 6 Participants Last post by  Garand
Sound suppressors, sufficient to muffle a 9mm or 22LR and for use in an emergency bigtime SHTF situation can be made in a matter of minutes. All it takes is some duct tape and a few tin cans or aluminum cans, or a plastic soda bottle. Granted these are crude and aiming with them is ludicrous so you need to be in fairly close, but they work fine for that SPY VERSUS SPY type of work or too bring down a deer that you sneaked up on in the dark of night in a survival situation. I do not condone making them, but it is possible to do it with materials readily at hand. Of course they work best if using a bolt action rifle or pistol as too much noise escapes a semi auto from the breech as the slide moves back, but even they if you use subsonic ammo they are pretty quiet. :) :dgrin: :)
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RE: ejection port noise.

My suppressor's designed for sustained (even full-auto) 5.56 use, so when using it with .22LR, it's VERY quiet. With 'normal' subsonics, the loudest noise literally is the bolt cycling.

However, (comma), using the 60-grain SSS load, the ejection-port noise IS very pronounced, to the point where IT is the loudest thing upon firing; a pronounced "pop". I assume this to be due to the heavy projectile, combined with the blowback nature of the .22 unit's bolt. Assuming similar velocity with this much heavier bullet, in a blowback action, means the bolt's got more force pushing it back, to open and eject; which (again, I assume) means it's opening faster (more force pushing against the bolt than normal). Opening faster means opening sooner after ignition, which means opening with more pressure still in the chamber/barrel; which means more is going to escape out the ejection port.

Also, could be that the SSS is using coarser or slower-burning powder; that could be a factor as well.

I'm no physicist, and the "why" of it are just assumptions on my part. But there's no question that with the 60-grain SSS load, the gun's a LOT louder than with the 38-grain Remington subs I usually use. It's just one of those things you just learn by experimenting; rather than just assume (as I would have) that all subsonic .22's would be similarly quiet.
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