I have a model D-4 weaver rifle scope with missing adjustment par

Red Laser Sight 650nm Weaver rail mount - Gamo USA

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650nm Red Laser Sight with Weaver style rail mount.

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Air Rifle Scope Mounts/Rails. Air Rifle Scope Mounts/Rails. Air Rifle Sights. Replaceable sights for air rifles. Air Rifle Spare Parts. Replaceable parts for air rifles.

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you can buy scope covers on e-bay but you need to know the sizes,, then not very pricy

there the same as any other mounts,,, screw then down on a wever mount and plonk your scope into them,,,then re-zero the scope

be cearfull you dont crush the scope tube,,but try rapping a little strip of sticky rubber or plastic tape round the scope tube then nipping the scope ring caps down onto this,,,but i think your scope rings are worn out or the wrong size,,ie 30mm not 25mm
i have air rifle scope's on my 7.62/308 and on my 303 none of them move about at all and they have stayed on zero for years now!

You must have the correct rings for your base. If the scope has rimfire dovetail rings already attached, it should be easy. Remove the 4 setscrews on the top of the receiver, install the dovetail mount (use blue locktite and DO NOT TIGHTEN THE SCREWS MORE THAN 10 IN/LBS! Otherwise you may strip the threads in the receiver!).Loosen the clamps, place the scope on the dovetail mount and tighten snugly.

If it has weaver mounts, you will need to install a weaver rail to your receiver. Remove the 4 setscrews on the top of the receiver, install the weaver mount (use blue locktite and DO NOT TIGHTEN THE SCREWS MORE THAN 10 IN/LBS! Otherwise you may strip the threads in the receiver!). Install the rings in the weaver slots, tighten snugly.

Go Here:

http://www.outdoorpros.com/How-To-Guides/How-To-Zero-A-Rifle-Scope/5

for info on how to zero your red-dot after you have it mounted.

Make sure the nuts are on the same side of the rifle (both on the right OR left). The clamping mechanism can vary the centering of the scope if they are on opposite sides of the mount.

The other problem may be poorly drilled mounting holes on the receiver or scope mount, check these for alignment with your bore or barrel.

You probably have rings designed for a standard Weaver style scope base.... you need "3/8" groove .22 style" rings... available from your local gun shop.
Hope this helps, Mark the Gunsmith

Please give feedback!

the front ring is for adjusting point of impact at a given range,,,its called a "parallax ajustment" it corrects for the scopes inaccuracies over its full range say from 10 yds to 100 yds there a bit of a pain on a hunting rifle as you need to focus them every time and that slows down your shooting, when only a snap shot will get the kill you cant wate to mess about focusing the darm scope so i never use them on my rifles,,unless im target shooing,, or im snipping when i have time to take my shot,,,
(a head shot only!) only a parallax scope is spot on aim from 10yds to infinity

Most of the older type scopes were rated at 4 clicks per inch at 100 meters.But to be sure you will have to test it. I generally do that at a 50 meter range and then it is 4 clicks per half inch.