suppressed .300 AAC AR- What do I need to know?

[PaulB84]

pistol or rifle length? If the ballistics are close, a suppressed 9" MI pistol sounds hard to beat for critter control...

What do I need to know as far as cycling reliably? Gas system? Can you go between subsonic suppressed and supersonic unsuppressed without adjustment?

thanks in advance. this is gonna be pricey but worth it in the end :getsum:

PS if anyone wants to plug a bolt gun in BLK I'm all ears...:sniper:

[Joeywhat]

Check out M4carbine.net, lots of info there.

In short, most of the quality barrels are designed to run 100% with subsonic ammo + can AND supersonic no can. I believe it will still work OK with supersonic + can but it's dirtier and you're blowing crap everywhere and it's kinda pointless. Most will NOT work with subsonic and no can.

No adjustments needed, either...just remove the can when shooting supersonic. This is for the 9" barrels out there.

A .300 AAC pistol is on my short list.

[7.62 Nato]

I would consider 16" barrel, carbine gas system for optimal ballistics. You could still use it on a pistol lower, or a rifle.

[Joeywhat]

I would consider 16" barrel, carbine gas system for optimal ballistics. You could still use it on a pistol lower, or a rifle.

How exactly would that be 'optimal'? It's designed to go through a shorter barrel. There's no use nearly doubling the barrel length when it nets you nothing.

[PaulB84]

Check out M4carbine.net, lots of info there.

In short, most of the quality barrels are designed to run 100% with subsonic ammo + can AND supersonic no can. I believe it will still work OK with supersonic + can but it's dirtier and you're blowing crap everywhere and it's kinda pointless. Most will NOT work with subsonic and no can.

No adjustments needed, either...just remove the can when shooting supersonic. This is for the 9" barrels out there.

A .300 AAC pistol is on my short list.

so you'd rather have the short barrel than the stock? I'm leaning the same way

[Joeywhat]

Well, there's no way in hell I'm bothering with a 16" barrel PLUS a can on the end. Pistol build will work just fine, shot enough of them before so I know they're plenty shootable.

[rjrivero]

Well, there's no way in hell I'm bothering with a 16" barrel PLUS a can on the end. Pistol build will work just fine, shot enough of them before so I know they're plenty shootable.
A 8" barrel 300 BLK is VERY manageable. I built a 16" upper, but I think I'll chop it down to 8". I'm using a pistol length gas system because I'll be "rolling my own" based on 300 Whisper recepies.

Fun round. Seriously accurate out to 100 yards and a VERY gentle recoil.

[swaker3333]

I would consider 16" barrel, carbine gas system for optimal ballistics. You could still use it on a pistol lower, or a rifle.

Between a 9" and a 16" you lose a grand total of 185fps with 123gr bullet that's already moving over 2100fps (out of the 9"). The bullet stabalizes well in a short barrel and the drop between the 9" and the 16" is pretty minimal in comparison if your only running it to 400. This round was designed for short barrels specifically.

[PaulB84]

Between a 9" and a 16" you lose a grand total of 185fps with 123gr bullet that's already moving over 2100fps (out of the 9"). The bullet stabalizes well in a short barrel and the drop between the 9" and the 16" is pretty minimal in comparison if your only running it to 400. This round was designed for short barrels specifically.

with stocks! :whistle:

[yocan]

no point in firing supersonic with a suppressor how about saving a lot of damage to your ears?

you could consider what I'm doing for my 6.5 and go with permenantly attached suppressor so that with a total of 16" including suppressor its very manageable on an ar15 with a ctr stock.

[Joeywhat]

no point in firing supersonic with a suppressor how about saving a lot of damage to your ears?

you could consider what I'm doing for my 6.5 and go with permenantly attached suppressor so that with a total of 16" including suppressor its very manageable on an ar15 with a ctr stock.

6.5 Grendel? Why go with a 6.5 cartridge out of such a short barrel? Go with a 6.8 if you want a shorty...it'll perform better out of the short barrel.

[swaker3333]

with stocks! :whistle:

I run mine on the pistol platform with a 10" barrel. It's not difficult all it takes is practice, if you don't think it can be done then just go get a 16" barrel and call it a day. The recoil is mild, the sling is your friend and leaving your skirt at home is also highly advised:whistle:

yocan-integrated suppressors are nice but your going to want to be able to clean your can, if your can breaks down to be cleaned then your barrel is no longer 16" and you have an SBR. Stupid? yes. The truth? unfortunatley so. Maybe you can find a can that goes back over the barrel instead of in front of it? Either way good luck!

[PaulB84]

while I do think the .300 would make a fine all around AR caliber for most people, I have AR's in 5.56 and 6.5, so this build will run suppressed subsonic 99% of the time.

I basically have 3 options, in increasing order of $$$

1. Plug and play a 16" into a bare bones MP15 I have

2. Buy/Build complete 16" upper, use existing lower

3. Buy/Build complete MI pistol

thoughts?

[swaker3333]

Noveske 10" barrel with gas block and gas tube=$365.00
Fail Zero Extreme Kit (flat top upper, hammer, charging handle, BCG)=$390.00
AR lower=$100.00
AR parts kit=$40.00
Buffer tube, buffer, spring=$50.00
Stark SE-2 pistol grip=$50.00
All prices were found on products (today) 09/09/11
Grand total of build=$995.00
You have a complete pistol with a high end upper all costing less then the cheapest 16" (poor products other then the barrel) barreled upper I could find, notice I said upper lower not included. Not shabby.

[PaulB84]

Noveske 10" barrel with gas block and gas tube=$365.00
Fail Zero Extreme Kit (flat top upper, hammer, charging handle, BCG)=$390.00
AR lower=$100.00
AR parts kit=$40.00
Buffer tube, buffer, spring=$50.00
Stark SE-2 pistol grip=$50.00
All prices were found on products (today) 09/09/11
Grand total of build=$995.00
You have a complete pistol with a high end upper all costing less then the cheapest 16" (poor products other then the barrel) barreled upper I could find, notice I said upper lower not included. Not shabby.

Missing a rail of some kind, but yeah, not bad for a top notch build.

I'm taking secret option 4.....trading for an LMT 10.5" AR pistol, then either swapping the barrel for .300 BLK or building/buying an upper.

Getting $$$ together for suppressors is the priority. I'll have plenty of time to get the gun together during the NFA process.

[rjrivero]

The more I think on the options for a 300 BLACKOUT for a Michigan Gun, the more attracted I am to a 16" rifle with integral suppressor.

For one, Integral Suppressors are quieter than barrel mounted ones. For another, the low pressures of the subsonic 300 BLACKOUT would be an Ideal platform for an integrally suppresed upper.

Hmmmm. Maybe another Form 1 is in my future........