Customer Reviews
There was no fixed o ring and that wasn’t even the worst part the grub screw striped it self out of the valve after a few shoots. Installed it and took 4 shoots through the chronograph and it worked but the 5th shot it’s was shooting hot. Looked in the bb catcher and there was the grub screw. A little bit disappointed as I ordered the back plate for the mp7 and that was flawless.
I used this on my MP7 and the o-ring and adjustment screw ejected from the muzzle on the first use.
The O-ring was simply poorly glued on and held in place very poorly.
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Purchased 4x of these tp install on several builds. As one of the reviews stated' the QC is inconsitent. 2 of the 4 orings detatched during adjustment. overall quality of the NPAS is 8/10. Had to drill and epoxy a M3 locking nut into the NPAS to work as stabel grub screw holder on the other 2.
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NPAS had metal burrs on some edges and too much glue on the o-ring. The set screw also loosens under use, the o-ring does not sufficiently keep it in place.