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  1. #1
    Machine Gunner
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    Default Thread adapter with suppressors and concentricity

    So I've got an optimus that I used on 308, 223 and 9mm. I recently built a 9mm carbine but due to sales got a 1/2x36 barrel instead of 1/2x28. I used the taper mount system on everything and dont really want to drop the coin to convert to 3 lug on this one. Griffin makes a taper mount flash hider for 9mm in 1/2x28 so I'm wondering if anyone has experience using a thread adapter like Kaw precision uses and if stacking the tolerances with the adapter plus flash hider plus suppressor is a likely concentricity problem.

  2. #2
    Grand Master Know It All CavSct1983's Avatar
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    I use thread adapters on all my rifles <30cal for my direct thread .30 cal suppressor, and have not experienced any issues.

    I suppose it would depend on the variance from part to part and whether or not the +/- was out of your favor.

    Could always take it to a competent machinist or gunsmith set up to diagnose such things and have them check it out before you send the first round.
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  3. #3
    WOODSMITH
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    No issues here. Out of an abundance of caution, I looked down the barrel to make certain I wouldn't hit the can the first 10 or 15 times I attached the can with it.
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  4. #4
    Machine Gunner SouthPaw's Avatar
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    I have an adapter on my SBR scorpion and run my form 1 suppressor with no issues. Im pretty sure I’ve only shot it suppressed since brand new and never had any issues in the 1000+ rounds.
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  5. #5
    Machine Gunner SAnd's Avatar
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    I had to do the multiple adapter thing a while back. It took 3 or 4 tries to get a good alignment. I would put them together, check it and find it not aligned, then take them apart , shift things and reassemble the check it a again. Eventually it came out right.

    Ark Tactical has some alignment rods to check. I'm not sure of what calibers they have though.

    Good luck.
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  6. #6
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    Thanks all. It saves about $120 to do it that way and makes it universal to my system. I'll give it a go and get an alignment rod if needed. Does passing the eye test typically mean it's good to go or is a rod more vital?

  7. #7
    Industry Partner BPTactical's Avatar
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    The alignment rod provides absolute proof positive of alignment/misalignment.
    Geisslle makes good 5.56 and 30 cal rods.
    That being said I have used the eyeball method plenty of times with no issue, as long as you can see a clear bore with no shadows/crescents you are typically ok.
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  8. #8
    Machine Gunner
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    Quote Originally Posted by BPTactical View Post
    The alignment rod provides absolute proof positive of alignment/misalignment.
    Geisslle makes good 5.56 and 30 cal rods.
    That being said I have used the eyeball method plenty of times with no issue, as long as you can see a clear bore with no shadows/crescents you are typically ok.
    Thanks bert!

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