Benjamin Regal II

I picked up a Regal II in .22 at my local Big 5 for 129$
A week after it went up to $229 so I feel I got a good deal.
I use it mostly for squirrel and backyard plinking at targets, it came with a 4x32 CP scope and I want to upgrade to a mil dot or P4 style optic that is inexpensive and able to withstand the nitro piston recoil.

If anyone could lend some advice for a AO inexpensive scope for the nitro piston abuse it would be greatly appreciated. My pellets of choice are JSB exact 18 grain and crosman premier HP.
 
I found this thread and wanted to say I bought one last week for $125. It is supposed to be 23 ft-lb so when I ran it over my chronograph I was expecting low to mid 800 fps... I was getting just over 700 fps (~15 ft-lb). It felt a little "gritty" when I cocked it so I think the piston tube may be dry, doesn't matter as I'm taking it back and exchanging it for another one. If the new one is the same I may keep it and mess around with it (I have the original one and it is my go to gun).
Greg