When it comes to the peep sight, I would recommend the the Williams with the target knobs. It’s a bit more expensive but very easily adjustable. You can quickly make a few klicks to your known backyard yardages. Also you should drill and tap a stop screw so the diopter stays put. It will slide rearward without a stop screw. The guns receiver is set up for the stop screw. Here is one with and one without the target knobs and one with and without the added stop screw. One says Beeman but both are made by Williams.
Just a note about the Williams with the target knobs that nobody ever seems to mention.....
YOU STILL NEED A SCREWDRIVER TO MAKE AN ELEVATION ADJUSTMENT
The gib lock screw has to be loosened, then the knob clicked to adjust, then the gib screw must be locked down again.
So that being the case, the target knobs aren't actually any more easily adjusted than the standard model, and pointless IMO.
The 5D series (Air Venturi model above) offers no micrometer click adjustment, and is somewhat fiddly to adjust if you plan on moving it often. But they do work well once set, and are much cheaper.
The FP-AG series (PN: 014168) is the same as the "TK" but without the target knobs. It has the micrometer click adjustments but uses a screwdriver to click instead of the knobs and is more streamlined. Here's a very old, well used example on my FWB:
https://shop.williamsgunsight.com/ecommerce/p/fpairgun-ag-014168 Good point to mention. The elevation set screw can be loctited so it is just snug enough as to hold the aperture from any wobble. Then the target knob functions without a screw driver. This will not work on the basic model because the upper piece could drop out and be lost. The model with the target knobs works like a high end diopter and screws into the base.
