
Originally Posted by
Iraqgunz
I am almost certain that the barrel nut was not tightened properly to begin with. I have seen it even on the VAUNTED Colt M4.
I have not used this particular model before. Is there anything that prevents the handguards from rotating? Screws or anything? FWIW- I bought an open package Troy MRF from GandRtactical and it worked pretty damned good. I think it cost around 179.00.
No anti rotation provision of any kind. Since this is a range toy/plinker for my son I was not worried about any real hard use. He is 6. 
The Troy has some lugs that protrude from in onto the upper reciever that keep it from rotating. The Larue and DD rails have their own anti rotation setup.
I will re-install the MI rail since returning it to a standard M4 configuration will be problematic considering the FSB/taper pin issue.
I feel pretty confident that once I properly torque it down to spec this problem won't happen again.
"Run fast. Shoot straight. Die proud." -Boba Fett
Trample the weak. Hurdle the dead.
"Despite what your mamma told you, violence does solve problems." -Ryan Job
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