One Can for 300 Black and 5.56?

teratos said:

.223 subsonic hits about as hard as .22 subs. Not impressive. .223 is loud. A suppressed AR is about as loud as an unsuppressed.22 firing supers.

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gun_nut said:

I have a sandman S and I like it. Sounds about the same as my buddies octane. I have not felt the need for the 5.56 end cap. But I do want a sandman K for the latest AR pistol build. Never really compared specs as I got it right before the ATF rule change for trusts so I went with what was in stock at the time.

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WildWeasel said:

To add to this; in most 223 and 556 AR setups, subs also turn it into a bolt action... You could get an adjustable gas system lightweight buffer, bolt carrier, etc, but then normal shells are hard on the system.

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danb said:

Tumbling / yaw are also a problem since 223 subs may not have enough stabilization/spin. Tumbling / yaw can be very very bad for baffles and end caps.

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DutchV said:

The Saker has removable front end caps so you can swap down to a .22 hole. Supposedly it makes it quieter but I haven't done an A-B comparison. Using the .30 cal cap makes 5.56 pretty quiet.

Part of me thinks the "dedicated caliber cans are quieter" line originated with suppressor manufacturers and dealers. Most of us don't have access to multiple cans or audio test gear, so it's hard to tell.

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44man said:

That makes enough sense to me to take 223 subs off the table, that and the good doc saying they hit like .22subs, sounds like they are pretty worthless to me

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Pinecone said:

This is why .300 BO in AR is so nice.

WRT 5.56 subs think about it. .22 LR is 40 grain bullet. 5.56, mag fed, you are limited to 77 grains. Both are subsonic, so about the same velocity.

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alucard0822 said:

Pretty much the point of the 300BO vs 5.56, functions with a much wider velocity range, most barrels stabilize anything well, more efficient, especially in shorter barrels, less flash/noise, and just takes a barrel swap to run it. Even without a suppressor or subsonic ammo, my 9" 300BO is FAR more pleasant to shoot, with less muzzle blast than a 16"in 5.56. If I want quiet 5.56 subs to actually function, I just run my 22LR upper with a can. The way modular and "overbuilt" can designs are going, probably better off choosing a variety of cans based on diameter and mounting options than the old 22,30,45 caliber reccomendations. Where you can shoot 22LR out of an 8"x1.5" modular 30cal rifle can with a 22 endcap, you give up a ton in weight/size. Some of the new rimfire cans, and small centerfire cans can handle 5.56, the Optimus micro is huge (1.1x5.3' 8oz)for it's "intended" role as a rimfire suppressor, but it is a tiny 5.56 suppressor. Can definitely see the benefit of a smaller/lighter can if you run a pistol or lightweight setup in one caliber or the other.

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