300 AAC Blackout

[verapakill]

Im getting ready to do another 80% build but have some questions.

I want to build an AR for the 300 AAC Blackout rounds.

What lower and mag fits these rounds? 556 or 308?
What size buffer is preferred?
Is there a different bolt for these?

Any info will really help thank you

[joelogic]

Everything is exactly the same as .223 except for the barrel, this is the point to the round.

[760knox]

Check out this video, if you haven't already.http://www.youtube.com/watch?v=Sd_2tcj7P4s

[darthnugget]

I am currently doing one in 7.62x40WT which is comparable to 300 Blackout but made by Wilson Combat. You may want to take a look at the information on 7.62x40WT which takes all the same parts as an AR-15 except for the barrel as well.

[Paper Boy]

This is my next project. Starting to get the stuff to reload for it together first, will start the upper in a few months. Going to play with loads for now. First thing I do when I move out of state in a few years is suppress it.

Dont forget this video of it suppressed.

[Californio]

My understanding. Generic 30 caliber bullets may require the inside of your magazine, sides, to be shaved in order to feed properly, see Pmags.

AAC has some purpose designed 300 BLK bullets that feed without magazine modifications, such as Remington UMC 115gr. new Barnes Vor-tx 110 gr., available next month etc.

Check this site for the most info, it is run by AAC.

http://www.300blktalk.com/forum/index.php

Standard H buffer will work, its pistol gas for SBR and carbine gas for 16".

Standard bolt, lower, etc. just a barrel change.

[verapakill]

Wow quick replies thanks guys so I will 80% a 556 and use the mags I already have.

The main thing is going to be hard to find is the barrel in 16 or 18 inch.

I have some research with the information I've already got

[joelogic]

Plenty of 16" barrels. Delta company or blackhole weaponry.

[Californio]

Wow quick replies thanks guys so I will 80% a 556 and use the mags I already have.

The main thing is going to be hard to find is the barrel in 16 or 18 inch.

I have some research with the information I've already got

What are you going to do with it?

Mine will be for hunting in the no-lead zone, so will be SS. Daniel Defense is coming out with one, according to their site, it will be chrome lined and LMT will have one for their MRP System which I bet would be chrome lined.

[gun fu]

Wow quick replies thanks guys so I will 80% a 556 and use the mags I already have.

The main thing is going to be hard to find is the barrel in 16 or 18 inch.

I have some research with the information I've already got

That's the beauty of this cartridge. I was fortunate enough to fire one built by www.jvdynamics.com

Using the subsonic 220 grain from Remington.

This 16" barrel had Surefire comp and I did not need to use hearing protection! Amazing! Imagine this fired suppressed...

[verapakill]

What are you going to do with it?

Mine will be for hunting in the no-lead zone, so will be SS. Daniel Defense is coming out with one, according to their site, it will be chrome lined and LMT will have one for their MRP System which I bet would be chrome lined.

I will be using it mostly for range days killing paper targets but once I get it broken in and sighted properly I want to use it to go hunting with.

[verapakill]

Ive started a list of parts that I want to buy for this build obviously I havent finished it yet so theres a few blank areas but I am making the list as I find the parts.

***80% 556 Ano Lower

***Butt Stock***
Magpul PRS

http://store.magpul.com/product/MAG307/84

Precision Rail Monopod

http://store.magpul.com/product/ACC001/35

***Upper Receiver***


***Handguard***
-Badger Ordnance .308 Stabilizer Std Handguard
-http://www.parts4ar15.com/ar-15_accessories/product/308-FF-525-04.html

***Barrel***
-http://www.deltacompanyarms.com/products/.300-BLK-barrels%2C-AR%252d15.html

***Flash Hider***
-Barret 50 cal style??


***Trigger Assembly***
-http://shop.battlearmsdevelopment.com/BAD-***-Geissele-DMR-COMBO-SPECIAL-FREE-SHIP-BAD-***-DMR.htm


***Charging Handle***
-http://www.bravocompanyusa.com/BCM-GUNFIGHTER-Charging-Handle-GFH-Mod-3-7-62-p/bcm%20gfh%20mod%203%20762.htm


***Bolt***


***Pistol Grip***
-http://www.midwayusa.com/product/564614/dpms-pistol-grip-panther-style-ar-15-synthetic-black


***Fire Selector***
-http://shop.battlearmsdevelopment.com/main.sc

***Gas/Piston System***

[Bhobbs]

I'm not sure what you mean by Barrett .50 Cal flash hider. AFAIK they have those big brakes on them. I haven't seen one with a flash hider on it. I sure as hell wouldn't want to fire one without a brake.

[Californio]

Ive started a list of parts that I want to buy for this build obviously I havent finished it yet so theres a few blank areas but I am making the list as I find the parts.

***80% 556 Ano Lower

***Butt Stock***
Magpul PRS

http://store.magpul.com/product/MAG307/84

Precision Rail Monopod

http://store.magpul.com/product/ACC001/35

***Upper Receiver***


***Handguard***
-Badger Ordnance .308 Stabilizer Std Handguard
-http://www.parts4ar15.com/ar-15_accessories/product/308-FF-525-04.html

***Barrel***
-http://www.deltacompanyarms.com/products/.300-BLK-barrels%2C-AR%252d15.html

***Flash Hider***
-Barret 50 cal style??


***Trigger Assembly***
-http://shop.battlearmsdevelopment.com/BAD-***-Geissele-DMR-COMBO-SPECIAL-FREE-SHIP-BAD-***-DMR.htm


***Charging Handle***
-http://www.bravocompanyusa.com/BCM-GUNFIGHTER-Charging-Handle-GFH-Mod-3-7-62-p/bcm%20gfh%20mod%203%20762.htm


***Bolt***


***Pistol Grip***
-http://www.midwayusa.com/product/564614/dpms-pistol-grip-panther-style-ar-15-synthetic-black


***Fire Selector***
-http://shop.battlearmsdevelopment.com/main.sc

***Gas/Piston System***

You use AR-15 parts not AR-10 parts. It is not a .308 Win case gun. It uses a .223 Rem case and necks it up to .30 caliber. The gun does not kick any more than .223.

[rsilvers]

Yes, all true.