I had one of these and hated the plastic feel and weight.
I upgraded to the heavy metal bad boy 
$650 AND it’s basically a show and handle piece, messing around with the gas shells was just a pain.
BUT seriously good for any close encounters…!! 
The young fellas one the same as mine feels better with the replacement pump friendly gave me which he’d weighted up with some black silicon or something, distributed the weight a bit more evenly and made less rear end heavy
Was supposed to do it with mine but the screw mount snapped out so may consider siliconing up the tactical pump when I get around to ordering it