Only 7" long and just 3 or 4 ounces, this 1960s or 70s vintage, Japanese 4X18 rail-mount Tasco is not only a silver-slipper fit for the PP750, but has as clear optics as I've seen on any scope at any price. Though I've been into Japanese-made vintage scopes for decades, I've never seen another scope like this one; not to be confused with the cheap-ass POSs marketed back then for kids' .22s.
Before finding the silver-slipper above, I used a Burris 6X Mini riflescope with adjustable objective. Those are great American made scopes, and seldom encountered.
This regulated PCP custom Crosman 2240 is powerful and accurate enough to justify a 3-12X Leapers Compact scope with multiple aim-points reticle.
A 2.5X RWS Compact rifle scope went well on this .177 Sharp U-FP Co2 pistol rig.
A little Browning-branded, 4X rifle scope made by Redfield in the Sixties or Seventies is possibly the finest 3/4" tube scope ever produced. Usually seen on the Browning ATD "Ladies Rifle" .22 automatic, it goes well on my .22 Crosman 112 custom Co2 pistol. Those scopes are (still) often encountered at gun shows, almost always with price tags of $250 for clean examples. When a gun show exhibitor quoted me $80 for this one, I didn't bother negotiating;
couldn't get the money out of my wallet fast enough!