have a .300 blackout with an MI gen 2 ss FF 12in on it. I fired it and after 2-3 shots it vibrated off and hung off the barrel. I replaced it, tightened the screws and repeat 2 shots. Same issue. Tightened screws and loc-tited in place and marked screws to see if they were turning. Because of the tightening the prongs it uses to lock into barrel nut bent to about 35-45 degree angle. Fired again and it again vibrated off, screws had not turned. I just wanted to post this for users to be aware of this issue as it is a popular handguard. If anyone has this issue please let me know. As a side note it is NOT movable simply by hand from start to finish of install. It only comes loose AFTER firing.
EDIT: got into contact with Troy and was given the option for a refund and also advised to loctite handguard to barrel nut. They have excellent customer service I must say. Will try it and post later. Still curious if anyone with larger caliber rifles has the same issue and if anyone has any other ideas for a fix.
i dont have any issues with my Gen 2 SS on my new 6.5 build. its a 15" guard on an 18" rail. Sorry to hear your trouble man!
Same as the above poster, I haven't had an issue.
And OP, I think you might be exaggerating a little bit about the 2-3 shots and having the tube fall off.
What do you have mounted on your rails that is so heavy its being jackhammered off your rifle in 3 shots??
Initially when I installed my tube I experienced a little slippage like what you describe, but absolutely nowhere near 3 shots and the tube fell off.
The best I can describe it as the tube moved forward a business card thickness every time the rifle fired.
After a 30 round magazine it was maybe 3/8" forward of its starting point.
I believe there is a video we made of the rail inching forward, and its my fault for not installing it tight enough.
I figure if I had installed the screws tighter the tube wouldn't have moved but I wanted to be sure it never moved again.
So I went home, loosened the screws, put a little loctite on the barrel nut, spread the clamping section of the tube open, reinstalled it and torqued the screws to 60 inch pounds. (probably too much...
I recently shot a 3gun match with the rifle, it had two contour cameras mounted on rail sections on the tube and it didn't move a smidge
And here are some pics to show off the sweet tube.
That is odd but Troy will take care of ya if needed. I have the TRX which is very similar and love it. If you do decide to go with loctite, be sure it is blue.
I had the same problem the first time I shot mine. The tube moved about 1/2 the way down the barrel nut in 20 rounds. I made sure every thing was degreased and loc-tited the clamp screws and torqued them to 55-60 in/lbs. I have another 80 some rounds through it with no problems.
Thanks for the info guys. In response to above, the only things mounted were a magpul AFG at the far end, a magpul buis and an O-light with mount. Total weight was very light and this was bench rest shooting so the rail was on sandbags at the time as I was sighting in an aimpoint. MI was very fast with their customer service and a new unit is on the way so I will reinstall with copious loc-tite. I was going to switch it to a DD modular 12.0 but after MI's customer service I will give it another go.