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Ordered (and paid for) an Advanced Armament M4-2000 suppressor for my CAR-15 back in October, and finally received back the ATF ppwk this past week.
Looking at it, it seems smaller than a 5.56 suppressor should be, but it works very well. Uses a proprietary flash hider with coars "acme" threads and a scalloped shoulder that mates with a retaining spring; holds it solid as a rock, yet can mount or dismount it in just a few seconds.
Don't have a db meter, but do have a digital recorder. So I set out to compare some things.
First, with the ciener .22 unit, using Remington 38-grain subsonic .22LR load. Fired my son's pump-up Crosman pellet rifle (7 pumps), my GAMO .177 pellet rifle, and then the ciener unit with the suppressor; all fired & recorded sequentially on the same "take". On playback, the GAMO was the loudest, and the Crosman and the Ciener were about the same. The loudest part of the ciener shot was the action cycling. (You can even hear the empty .22 brass hit the garage vinyl siding on the recording. It was almost as loud as the shot itself.)
Also ran a magfull of .22's thru the ciener unit & recorded it. When I was done, you can still hear the birds chirping on the building (20 feet away) & power line (60 feet away). Didn't spook them a bit. :beer:
Supersonic .22 ammo has a sonic "crack"; nothing can be done about that.
Next was to compare the suppressor with 5.56 mil-spec 55-grain ammo to an unsuppressed .22LR rifle using standard bulk-pak "hi-velocity" .22LR ammo. The 5.56 was more pronounced, but seemed so because the report was "longer" than the .22's. Couldn't say absolutely that it was higher db level, seemed more that it was right at the same db's, but for a longer duration. Makes sense, as the suppressor still has to release all the energy it can't absorb as heat; it just delays it and releases it more gradually.
If I can lay my hands on a digital "peak & hold" type db meter that will show the highest sound level measured, I'll try it out. Until then, suffice it to say that I'm VERY happy with this thing so far.
Deer seasons this year, I plan to use it. (It's legal in Arkansas to hunt with suppressors, and even with full-auto if you want.) Can't wait to see the looks on the hillbilly's faces when I pull out the CAR with a silencer, alongside their .32-20's, etc.
Squirrel season - you bet. Accurate, subsonic .22 ammo; shooting quieter than a pellet gun...? You bet...
Now I'm just waiting on my Ruger Mk2 to be released, with its new integral 1x7" suppressor. (Looks like a 7" bull barrel) It'll probably be another 6-8 months on that one, too.... :angry:
Looking at it, it seems smaller than a 5.56 suppressor should be, but it works very well. Uses a proprietary flash hider with coars "acme" threads and a scalloped shoulder that mates with a retaining spring; holds it solid as a rock, yet can mount or dismount it in just a few seconds.
Don't have a db meter, but do have a digital recorder. So I set out to compare some things.
First, with the ciener .22 unit, using Remington 38-grain subsonic .22LR load. Fired my son's pump-up Crosman pellet rifle (7 pumps), my GAMO .177 pellet rifle, and then the ciener unit with the suppressor; all fired & recorded sequentially on the same "take". On playback, the GAMO was the loudest, and the Crosman and the Ciener were about the same. The loudest part of the ciener shot was the action cycling. (You can even hear the empty .22 brass hit the garage vinyl siding on the recording. It was almost as loud as the shot itself.)
Also ran a magfull of .22's thru the ciener unit & recorded it. When I was done, you can still hear the birds chirping on the building (20 feet away) & power line (60 feet away). Didn't spook them a bit. :beer:
Supersonic .22 ammo has a sonic "crack"; nothing can be done about that.
Next was to compare the suppressor with 5.56 mil-spec 55-grain ammo to an unsuppressed .22LR rifle using standard bulk-pak "hi-velocity" .22LR ammo. The 5.56 was more pronounced, but seemed so because the report was "longer" than the .22's. Couldn't say absolutely that it was higher db level, seemed more that it was right at the same db's, but for a longer duration. Makes sense, as the suppressor still has to release all the energy it can't absorb as heat; it just delays it and releases it more gradually.
If I can lay my hands on a digital "peak & hold" type db meter that will show the highest sound level measured, I'll try it out. Until then, suffice it to say that I'm VERY happy with this thing so far.
Deer seasons this year, I plan to use it. (It's legal in Arkansas to hunt with suppressors, and even with full-auto if you want.) Can't wait to see the looks on the hillbilly's faces when I pull out the CAR with a silencer, alongside their .32-20's, etc.
Squirrel season - you bet. Accurate, subsonic .22 ammo; shooting quieter than a pellet gun...? You bet...
Now I'm just waiting on my Ruger Mk2 to be released, with its new integral 1x7" suppressor. (Looks like a 7" bull barrel) It'll probably be another 6-8 months on that one, too.... :angry: