Looking for a 300AAC / Blackout barrel
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Thread: Looking for a 300AAC / Blackout barrel

  1. #1
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    Looking for a 300AAC / Blackout barrel

    I've seen posts where someone is going to produce barrels in different caliber's but haven't seen any actually for sale ... Of course ultimately I'd like to have the barrel & gas system in one unit ... I suppose that would be a caliber conversion, and they don't seem to exist.

    Any advise appreciated!

  2. #2
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    Get the gas system and locking ring parts from Bushmaster then find a carbine length gas system blackout barrel (Wilson Combat, Rainier Arms, etc.) and hope Marvin of Nefarious Arms can put them together into a working caliber conversion.

  3. #3
    I like Turtles bigdog2003_99's Avatar
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    The 300blk conversion isn't that easy of a task to do on the Acr because of the gas system. 300blk generally likes pistol length for best performance and the Acr can't go that short without some minor work.
    Rest in Peace Franny
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    The reason you do not see many for sale is because they are all custom-made. Most of the people who have them made plan on keeping them a while because of the cost of the conversion and time it takes for parts to be delivered, and work to be done.

  6. #5
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    Quote Originally Posted by No_mic_marshall View Post
    The reason you do not see many for sale is because they are all custom-made. Most of the people who have them made plan on keeping them a while because of the cost of the conversion and time it takes for parts to be delivered, and work to be done.
    So just call Bushmaster and order everything but the barrel?

    Any idea what that runs?

    Has anyone looked at modifying an AR barrel in 300 and/or a different piston system like Osprey Defense?
    I only ask because I have a Osprey system on the shelf that I was going to put on a gun 10.5" SBR then and after FTF problems I made a call to Osprey Tech Support and their 16" will work for anything down to 11.5" but less that that it experiences the FTF problems that I encountered ... and to their credit I do have one on my 11.5" Colt Commando barrel I run on my M16 and one on my 16" Colt A3 Tactical. They said they were working on a system for barrels from 7" to 11.5 but its still in development.

  7. #6
    I like Turtles bigdog2003_99's Avatar
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    You might be able to modify a new gas system to work with the Acr but does the Acr gas block height match an AR? If not the piston won't line up with the receiver at all. You will also have to tuck everything under the charging handle assembly.
    Rest in Peace Franny
    Employee BBC Armament 07/02
    Email me for questions or Acr barrel conversions (remove spaces)
    templarprecision @ yahoo.com
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  8. #7
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    Quote Originally Posted by bigdog2003_99 View Post
    You might be able to modify a new gas system to work with the Acr but does the Acr gas block height match an AR? If not the piston won't line up with the receiver at all. You will also have to tuck everything under the charging handle assembly.
    I took the hand-guard off and pulled the barrel ... There's all kind of room up there for the gas piston so all I need is a gas block the correct height with a port the same size as an AR gas tube ... then cut the op-rod to the correct length, I put the Osprey gas piston up there and stuck it in the end of the original gas block and as you can see there is no problem with the charging handle.


    Last edited by kimberkid; 06-26-2015 at 09:21 PM.

  9. #8
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    Um, what? That picture has the charging handle pulled back. Have you tried it with it forward? Still may work, but you said as we can see, and I see that picture showing us that it clears the receiver, not charging handle assembly.

  10. #9
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    duh ... I pulled it back to get the barrel out and didn't release it.

    The older I get, the more brain farts I have.

    I hate getting old.

    I'll do it again tonight.

    Actually, as I look at it, I believe the Osprey gas cup and piston will be situated further forward with a gas block that is actually over the port.
    In this picture the Osprey gas cup and piston is just sitting in the end of ACR gas block which is quite long I still don't think it will be a problem getting it in there.
    Last edited by kimberkid; 06-27-2015 at 10:20 AM.
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  11. #10
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    Here it is with the charge handle forward, I laid the Osprey Defense piston assembly on top in the approximately where it would go with a shorter and custom made gas block. Actually the piston assembly would go back further as I don't have the barrel port and piston port quite lined up.

    Back to my original question, are there any barrels out there?



 
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