HBI Receiver Pin (Scorpion)

The HBI Receiver Pin for the CZ Scorpion Evo 3 removes the pesky play or motion between the upper and lower receivers. The ability to take down the weapon with a single pin is amazing, but due to production tolerance stacking some Scorpion Evo’s do exhibit more wobble or play between the receivers than others. Our pin is designed to tighten up that connection point and give the upper-lower receivers the rock-solid fitment they are capable of.

The head on our pin features an undercut groove not found on the factory pin - this groove accepts many improvised pry tools (driver, blade, etc…) to aid in removal for field strip and weapon take down.

The HBI Spec Pin is machined from 4140 Chromoly and finished with black nitride.

NOTE: Installation of our Spec Pin requires disassembly and drilling of your bolt stop (item #44 on factory parts diagram). Each Spec Pin ships with a Cobalt Steel drill bit sized specifically for this purpose. Please watch the installation video on the HBI website.