PS90 Chop-Top
MK3 Firearms demonstrates their 'Chop Top' modification for the FN PS90. This process removes the bulky factory optic mount and integrates a custom Picatinny rail directly into the receiver, creating a lower profile and more streamlined platform. This modification enhances concealability, especially when paired with smaller red dot sights like the SRO or RMR, and allows for a better cheek weld with certain optics. The video also showcases the PS90 equipped with an Innovative Arms Slingshot titanium suppressor and a Leupold LCO optic.











