The rear strap mount uses the already existing hardware points of the PS90 stock to mount itself
However we recommend using the MRO for best results
Although the sling is attached to the groove of the barrel
However prototype work is our specialty and we like a challenge
and alleviates the need to remove the sight when switching the power source
PS-90 Fixed Mount (Vortex Crossfire & Sparc ll, Aimpoint T-1 & T-2, Romeo-5 & 4, Holosun HE515GT & Holosun 503, HS403b) QD The rear strap mount usesThis mount will accept the T 1 T 2, the Vortex Sparc ll, and the Romeo 5, and the ACSS Cyclops by Primary Arms, Holosun HE515GT (red or green) . For people battling with astigmatism the ACSS Cyclops Gen 1 by Primary Arms is what we recommend, due to it being an etched reticle and reasonably priced. As a bonus it also works with our FX3 3X Optic Flipper! Recently Primary Arms has come out with an ACSS Cyclops Gen 2 which we also made a mount for! This