Both guns were shipped off to RWS,NJ a week ago and they are back already. The model 48 had the breechseal replaced and the P-5 had a safety spring replaced(no charge), I'll have to shoot them through the chrono at work tomorrow.
They passed the back porch shooting test, 1st shot with the P5 nailed the 35 yard hanging juice can and the model 48 killed the 50 yd hanging soup can after I mounted and sighted the beeman rear aperature.( It has the stock front sight which I filed to allow a more precise aiming point than the stock sight gives.)

I'm going down to the creek with the kids, maybe we'll run across a renegade squirrel before the sun sets.

Boy that was fast getting your guns back. I hope you enjoy both of them now.I might have to break the model 45 out tomarrow. I have not stot that one in a long time.I have a used TV setting out in the back yard. Im going to cream the heck out of it.....

Is it a slip-on fit that Beeman aperture sight?

Simple installation,it goes on the scope rail and is secured using allen screws, you may want to use lock tite because it will eventually work lose from recoil.

is easy, and if installed properly it will stay put even on a rifle like the 48. The instructions explain quite well, just make sure to utilize all three set screws including the two allen screws on the side and the screw on the top of the sight base. The allen set screws on the side should be snugged up but not over tightened, they control the clamps that grab the rail. Then the screw on the top of the sight base is tighteded, followed by double check of the side set screws to make sure they are snug. The top set screw actually does alot more to hold the sight in place than the two on the side.

HTH,
Mulby