PTG has a new barrel nut

Discussion in 'Modifications' started by GrocMax, Jul 28, 2015.

  1. GrocMax Active Member

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    Jun 12, 2014
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    Tried several. The 1-1/16" sockets fit tighter/better than wrenches. I'll probably end up clearancing a 27mm to fit snug.
  2. elpasowrangler New Member

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    May 21, 2015
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    so, will this nut fit the 308 patrol?

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  3. wood chucker Moderator

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    Hi elpasowrangler. Welcome.

    5.56 and .308 MVP's are two different sized actions. 5.56 is it's own small action size smaller in all dimension then the .308 MVP which is Remington 700 short action size so no this particular nut wont fit the .308
  4. elpasowrangler New Member

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    it would really be cool if ar15 or ar10 barrels could be used to change out calibers.

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  5. elpasowrangler New Member

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    I wonder where you can get one to fit the 308?

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  6. Keith Moderator

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    Might have to get one custom machined. There is more out there for the 5.56 model than the 7.62. There are also more 5.56 models than there are 7.62s. So the parts makers go where the bigger market is.
  7. elpasowrangler New Member

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    I would love to be able to install a 7-08 barrel and then swap back easily.

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  8. elpasowrangler New Member

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    Or even a 243 at times.

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  9. wood chucker Moderator

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    Well we have a couple forum members Robert Lynch and Mike Bacon of Crosshair Precision that would be a start and then there's X ring accuracy.
  10. BSJ Member

    Member Since:
    Jul 6, 2013
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    How difficult would it be to open up a 27mm box wrench to fit? Just a bit of filing on the corners, or is it more involved?
  11. Keith Moderator

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    i'm not sure if they go that big but there are socket sets where the ratchet goes around the socket instead of inside. Though I suppose one could just get a regular socket and use a pipe wrench. One would still need a Crows Foot wrench or B-Nut wrench to torque it down.


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  12. Josh Turner Member

    Member Since:
    Mar 3, 2014
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    I am now in the same boat. The wrench you are talking about is a scaffolding spanner.
    Here is a link. http://www.amazon.com/Scaffolding-S...448471492&sr=8-10&keywords=scaffolding wrench
    The best fit I can get is with a 1 1/8 6 point socket. My plan is to take my band saw and cut the back off the socket. Then weld the back to the side of the socket. Then use brass shim stock to take up some wiggle room. I just wish PTG would either make us a wrench or use the original nut dimensions!!!!!!!!!!! I am not happy at all with the nut being a weird size.
  13. Kent New Member

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    Apr 24, 2014
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    I went to a local surplus dealer who had a drawer full of used 1 1/6" sockets. I tried a new PTG nut in them all and 3 (about 5%) were a snug fit on the PTG nut, one of which I had made into a wrench. So, all 1 16" sockets are not the same. The trick is finding a sloppy one. The one I used was unmarked, but the other two were marked POWER-KRAFT and CTC (Taiwan).

    FYI, the very first PTG nuts were sized to fit either a 1 1/6" or 27mm twelve point wrench/socket. However, the shop said it looked odd because point-to-point the nut was visably smaller than the action diameter and didn't "look right", a cosmetic thing, so they made it a little larger. 'Can't blame them, they went to the trouble to make it for us, and have to sell it (at a good price) to recover their investment, and we still make out. Although I use a 12 pt. wrench, I have used the existing PTG nut wrenching flats in an adjustable wrench. Normally, 10-15 ft. pounds is plenty, not the *** ft. pounds Mossberg (machine) applies. BTW, I had to use a 18" pipe wrench and a 3 pound sledgehammer to get the factory nut loose.
  14. Josh Turner Member

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    Mar 3, 2014
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    I also used a pipe wrench to remove the nut. That machine they use to put them on must be a terminator! I contacted ptg about the issues were all having trying to find wrenches and they told me they would be working on a wrench. I'll let everyone know if I get one in my hands one. You only torqued to 15 foot pounds? I was going to do it like the savages I have built. @ 35 foot pound.
  15. Kent New Member

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    Apr 24, 2014
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    I've seen two 5.56 MVPs, and both had the barrel nut's pin spanner hole ripped out in the tightening direction. Mossberg said they don't sell the nut separately because it was, "installed by their machine", and the only way to get a new one was to send my gun to them to have the nut replaced. Terrific, the replacement would end up like the original. That's when I called PTG.

    I'm a Savage man, too, and have lost count of how many barrels I've swapped. I have a very hunky, custom made barrel nut wrench because many of the factory installed barrels literally come loose with a loud "BANG!". I install them with 10-15 ft. pounds of torque and never had a barrel shoot loose. I once saw a benchrest barrel installed with only hand toque. Mind you, a good bench rest barreled action has the clamping surfaces machined VERY square and VERY flat which means near maximum contact, and a barrel clamp and action wrench IS required to disassemble them. The combination of right-hand barrel threads and right-hand rifling twist means the barrel continues to tighten with every shot.
  16. wood chucker Moderator

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    I made a honkin big a$$ barrel wrench but didn't need it, the MVP barrel tools I got from Tromix did the deed with ease.
  17. wood chucker Moderator

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    Hey Kent,

    Tromix makes this barrel nut
    [IMG]
    and it plays well with by itself or with this lock ring

    [IMG]

    So ya got options in case you can't find a factory nut.
  18. Kent New Member

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    Apr 24, 2014
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    If memory serves, I had already approached PTG before Tromix came out with their Mossberg tools and parts. At the time, I had searched everywhere I could think of, including this forum, but couldn't find anything aftermarket for the MVP. That said, it's nice to have alternative options. Now, if someone else would make more drop-in barrels for the MVP I would be complete.
  19. wood chucker Moderator

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    Have you checked out the " what fits: aftermarket parts " thread since we started updating it ?

    In some of the updates we listed Crosshair Precision, X ring accuracy, Tromix and Xcaliber ( they got ya covered for barrels ) and we been adding hot links to the manufacturers websites who make MVP goodies.


    It blows my mind quick the list has grown and how much stuff there is already compared to how short a time the MVP has been on the market.

    FWIW it took dang decades for the aftermarket for the Rem 700 to hit this level.
  20. Kent New Member

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    Apr 24, 2014
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    I finally got around to checking it out, very impressive. Thanks.

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