MR762 & Surefire SF3P-762-M15X1 Flash Hider - Spacers
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Thread: MR762 & Surefire SF3P-762-M15X1 Flash Hider - Spacers

  1. #1
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    Default MR762 & Surefire SF3P-762-M15X1 Flash Hider - Spacers

    While waiting for my SOCOM762-RC2 suppressor to exit Suppressor Jail, I decided to order and install the Suppressor Mount/Flash Hider. It turns out that when hand tightened all the way, there is a huge gap between the flash hider and the shoulder at the end of the barrel. More than can be covered by shims.

    Some searching on HKPRO resulted in some pics of a spacer that Surefire made that solved that situation. Unfortunately I could find no part numbers for it.
    - https://www.hkpro.com/forum/attachme...-img_00141.jpg
    - https://www.hkpro.com/forum/attachme...n-img_0014.jpg
    - https://www.hkpro.com/forum/attachme...n-img_0015.jpg
    - https://www.hkpro.com/forum/attachme...n-img_0016.jpg

    Well, I just got off the phone with Rene Zavala at SureFire (super helpful guy, btw) and he found two possible spacers to send me. I assume it will be the first spacer but wanted to provide some initial part numbers. He is also sending extra shims. I will install the spacer and report back with the correct part number that works. Here are the part numbers:
    - Shim Kit, 71657-1, .750OD x .635ID
    - Spacer, 71734-1, .750OD x .635ID x .125
    - Spacer, 71734-11, .885OD x .750ID

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    Hi, a quick update. I've received the spacer and shims today and was able to install the flash hider on my MR762 with this following parts:

    Shim Kit 71657-1 .750OD x .635ID
    Spacer 71734-1 .750OD x .635ID x .125

    I ended up needing one red shim and 3 non-colored shims. Unfortunately I can't tighten it down as my Magpul armorer's wrench is too thick (as are my open ended and crow foot wrenches) but I think this is the right solution.

    Thanks,
    Doug

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    when i can ill check on my 762 upper but for my 556 systems i ended up using a 3/4 open end thin wrench
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    Thank you! You're right that a 3/4" open end thin wrench is correct. I got my thinner wrenches and was able to solve it!
    Last edited by douglasjboehme; 11-22-2018 at 04:56 AM.
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    Had the same problem a few years back with my Surefire SOCOM 7.62 brake. Came with no spacer. Called Surefire and they also sent me a spacer and a few additional shins.
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    Quote Originally Posted by samnev View Post
    Had the same problem a few years back with my Surefire SOCOM 7.62 brake. Came with no spacer. Called Surefire and they also sent me a spacer and a few additional shins.
    My hope is this can be a reference for the group so they can request specific part numbers and reduce the turnaround time.

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