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Thread: New Viking Tactics VTAC EXTREME BattleRail - By Troy Industries

  1. #201
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    Quote Originally Posted by royta View Post
    It appears this handguard attaches to the stock barrel nut by a squeeze method. Is this correct? That doesn't seem very heavy duty. Almost like I could bend the handguard back and forth while pulling on it so as to slide it off the nut. Isn't there some method to actually lock the handguard to the barrel nut?
    Stock barrel nut? No, it comes with it's own.
    Heavy duty? That's all relative.

    The only things I hang off mine are a sling attachment (QD), Surefire X300 and a back up front sight. I would not mount optics or lasers or use it for a tow hook or air drop parachute connecting point. For everything else it works just fine.
    Chief Armorer for Elite Shooting Sports in Manassas VA
    Chief Armorer for Corp Arms (FFL 07-08/SOT 02)

  2. #202
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    Quote Originally Posted by usmcvet View Post
    The rail slides onto the nut at about 2 o'clock you then rock it left back to noon and then tighten the two allen head bolts. It is pretty solid.
    Quote Originally Posted by Robb Jensen View Post
    Stock barrel nut? No, it comes with it's own.
    Heavy duty? That's all relative.

    The only things I hang off mine are a sling attachment (QD), Surefire X300 and a back up front sight. I would not mount optics or lasers or use it for a tow hook or air drop parachute connecting point. For everything else it works just fine.

    Thanks for the info. I thought it slid on to the nut and then you tightened it down, with nothing keeping it from sliding off the nut but friction. Thanks for the clarification.



    Has anybody had any problems with the tabs bending towards each other when tightening the screws? This would obviously change the axis of the screw holes.



    I'm also looking at the MI SS12. How does the mounting and weight compare with the VTAC TRX?

  3. #203
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    Quote Originally Posted by royta View Post
    It appears this handguard attaches to the stock barrel nut by a squeeze method. Is this correct? That doesn't seem very heavy duty. Almost like I could bend the handguard back and forth while pulling on it so as to slide it off the nut. Isn't there some method to actually lock the handguard to the barrel nut?
    It does squeeze down, but on a proprietary nut. You give it a little twist at the end and it kind of locks down and then you tighten the 2 bolts. it's very secure. You can flex it some but I don't think the attachment point is giving. I think the whole unit just has some flex in it.

  4. #204
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    Quote Originally Posted by justin_247 View Post
    What is the width and height of the tube with a rail section bolted on each side so that I can compare it with some quad rails?

    Every single time I think I nearly have my next build figured out, new question pops in my head after holding a component in my hand.
    I don't think it has the width or height with a rail section on each side, but it's a start.

    Link to free float rail chart:
    http://tacticalyellowvisor.net/69016/69058.html
    Last edited by elkknuckle; 12-05-10 at 22:59.

  5. #205
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    Thanks to all for this thread, reading it made me go with the VTAC extreme rail on my new Daniel Defense build.


  6. #206
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    Quote Originally Posted by Seagrave7 View Post
    Thanks to all for this thread, reading it made me go with the VTAC extreme rail on my new Daniel Defense build.
    Very nice (brilliant minds think alike). My Troy 11" is in hand; just waiting for my LW DD stripped upper to show up.

  7. #207
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    Alignment issue?

    Hey all. I just installed a 13 inch Vtac on my rifle today, and I think I'm having an alignment issue. The top rail on the handguard doesn't line up with the top rail on the receiver. Eyeballing it, I'd say it's maybe 1/16 of an inch further right. It's also lower than the receiver rail by the same amount. Is this within acceptable tolerances (if such a thing exists), or is it more likely that I installed the rail incorrectly? I don't want to loctite the allens without knowing if this is a problem. I'll post pics if anyone thinks it would help.

  8. #208
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    Quote Originally Posted by Grim Fandango View Post
    Hey all. I just installed a 13 inch Vtac on my rifle today, and I think I'm having an alignment issue. The top rail on the handguard doesn't line up with the top rail on the receiver. Eyeballing it, I'd say it's maybe 1/16 of an inch further right. It's also lower than the receiver rail by the same amount. Is this within acceptable tolerances (if such a thing exists), or is it more likely that I installed the rail incorrectly? I don't want to loctite the allens without knowing if this is a problem. I'll post pics if anyone thinks it would help.
    Post a pic if you can. The fact that it is lower than your receiver kinda makes me think that your receiver is out of spec. What receiver did you use? Also, make sure that you lined up your barrel nut properly...
    "Perfect Practice Makes Perfect"
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  9. #209
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    Quote Originally Posted by CoryCop25 View Post
    Post a pic if you can. The fact that it is lower than your receiver kinda makes me think that your receiver is out of spec. What receiver did you use? Also, make sure that you lined up your barrel nut properly...
    The upper receiver is a Colt that I got from Brownells (M4 stamped above gas tube hole, C and keyhole on right side).









    I had to get on my laptop to upload those, so I took the opportunity to do a bit of googling. I came up with this thread:

    https://www.m4carbine.net/showthread.php?p=619237

    The problem sounds similar to mine. I can't rule it out, but I don't think my upper is out of spec. Could it be that I overtightened the hex screws on the bottom? I have the instructions here, and they say "tighten 1/2 turn past hand tight... there should be about a 1/8" gap in the clamp." The "1/2 turn past hand tight" thing is pretty vague, but that's what I tried for. The gap is much narrower than 1/8", though. Also, I installed the barrel nut at 45 foot pounds. I started out trying for 60, but there was no way I was going to get the groove lined up to allow me to insert the gas tube. The instructions call for 30-60 foot pounds, so I thought 45 would be a safe bet, and that seemed to get the nut tightened up and aligned with the gas tube hole. It may be worth noting that my rail came with the Troy barrel nut wrench, so I didn't have to jury rig one.

  10. #210
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    I have a similar issue on a standard Troy 13.0 after initial installation but for my purposes it really doesn't matter and I haven't taken the time to try to sort it out. I have three other Troy/VTAC tubes and none of them have this issue.
    Last edited by rob_s; 12-26-10 at 06:13.

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