The original quad rail for Sub2000 had a bit of flex in it. While sights installed on it seemed to keep zero, it didn’t inspire confidence. Keltec updated the rail and the new version is rock-solid. I tried a 45* offset rail to locate the optic on the left, to allow folding with the sight installed, but that amount of offset didn’t make for a good sight picture. With EOTech XPS3, the red dot in a circle can float just above the front sight and still provide accurate zero. I am considering removing the top half of the front sight hood to provide a better sight picture. While the sight keeps the carbine from being folded completely, it can be folded 2/3 of the way. It still fits in a briefcase or a messenger bag and unfolds with one hand as the latch is no longer engaged. This carbine uses magazines compatible with Keltec P11 and some S&W pistols. Other models are compatible with Beretta, Sig or Glock. I have a couple of 33rd magazines on order for the other Sub2000 to supplement the Glock 17-rounders. The rains in muzzle velocity are modest (100-200fps) but the gains in precision, the reduction of muzzle flash and report make carbines more desirable than pistols in longer-range events such as riots.
The main advantage of the EOTech in this application is the wide field of view. A cross eye dominant shooter (such as the woman shown) can put her weak eye behind the sight, look at the target with her dominant eye and still have the correct sight picture. Iron sights, visible in the lower third of the holographic window, are available as backup. The laser provides an alternate aiming method, especially useful when firing on the move. The light can be set to strobe: it works fine for the shooter due to persistence of vision but blinds the opposition whose eyes can’t get used to the sudden changes in the light level.