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I picked up a Seekins adj gas block from brownells. It fit under my NEA hand guard no problem.
It had a smaller profile than others that I looked at. Most have their specs on their individual websites.
It worked fantastic once it was dialed in. Then I tried to open it up a touch more when it was smoking hot and the allen set screw sheered off leaving it suck bottomed out because of a dumb mistake on my part (became bolt action) gb is sitting in the parts bin waiting to be either repaired out I try to send it back down south.
I would spend the extra $30-50.00 and buy a JP or Syrac if it needs to be adjustable. Taking the rail off to adjust is a pain.
The syrac adjusts from the front of the gb and doesn't deal with grub screws to set the adjustment
