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Suppressed 300 Blk build suggestions

Thread in 'Class III & NFA Discussion' started by rumrunner55, Oct 16, 2018.

  1. rumrunner55

    rumrunner55 ODT Junkie!

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    Never built an AR before as im more of a combloc lover but the prices just scream "buy a reciever!!" so I said what the heck lets do it. Now, Id like all the experts here to help design the thing. Im looking to do a 300 Blk suppressed only (so subs) pistol/sbr build. Plan on going with the silent capture spring/buffer but unsure of barrel length and uppers selections and if a specific bolt carrier group is best? Overall id just wanna hear your "dream" component builds for the quietest setup
     
  2. Allsmiles

    Allsmiles The Hen that laid the Golden Legos Supporter

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    Build a 7.62x39 AR and use the ammo you already have. It won't be subsonic; but it does suppress well. That's what I will be carrying again in the woods instead of my 308 AR. Get a 30 cal suppressor and shoot anything you want would be my suggestion.
     
  3. Lazarus

    Lazarus The Hen that laid the Golden Legos

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    Barrel length might depend on which suppressor you're planning on running and if they have a minimum barrel length on their suppressor. I'm running a 8.5” BA barrel and a AAC SDN-6. I'm using a CMT PDW lower so I have no options for swapping out the spring or buffer but CMT does recommend using an adjustable gas block. Also look into Gemtechs BCG for suppression.
     
  4. 3rd Rail

    3rd Rail Frontiersman Supporter

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    ^^^
    Suppressor min barrel specs.
     
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  5. jeep78

    jeep78 The Hen that laid the Golden Legos Supporter

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    Min barrel length doesn't apply to subs.
     
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  6. jeep78

    jeep78 The Hen that laid the Golden Legos Supporter

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    Adjustable gas (gasblock or bcg) allows locked breech for max quiet when wanted.
     
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  7. cjnowell72

    cjnowell72 Radar Supporter

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    I have a complete AAC upper 10.5” in 300 BO. Its expensive but extremely accurate. About $900 for their complete upper. I use it for deer hunting and coyotes. Hence the night vision and IR flashlight. I live in the country but in a small neighborhood with large lots. None of the neighbors have ever heard me shooting in the backyard unless it was unsuppressed. I have shot two bucks with that were in a full on sprint in my back yard. 4873585F-7A63-408A-AB86-EDB82E01DD01.jpeg 68860716-A5D3-4F74-A7DB-1147B155903D.jpeg A94CADE0-1E8A-47C3-9CC2-90DC5A9E801A.jpeg AAC designed it for use with their 10.5” upper. They got the best ballistics with their 220gr rounds. I have the AAC sdn6 can which was purpose built for that round. It is almost as quite as my MP5sd.
     
  8. Lazarus

    Lazarus The Hen that laid the Golden Legos

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    Easier on the internal as well

    20180905_093617.jpg
     
  9. rumrunner55

    rumrunner55 ODT Junkie!

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    I have no min barrel length restrictions for subs or supers just plan to only ever run it suppressed.