i don't have a modern nvs,but i used an an/pvs2 if iirc,and it is out of the $500 range. i have a real first generation ppn2 soviet design. it looks like the night sight on a m3. it has a large battery for the ir source,and is cumbersome. it would have been practical only in defense.keeping in mind i have never even held,much less looked through,a modern $500 scope,i could be very wrong. but you will probably need a good ir source to see 250 yards away,especially on a very dark night. the way i use mine,is i energize the scope,but not its ir source[cause it would run the battery down]and use a hand held light from a 12v battery with an ir filter. it is really funny to look at cats in the dark. possums,dogs,don't notice,but the cats know something is up but can't figure out what. i digress. the best i can say is borrow one,bite the bullet and get one. as usual,check back in and let us know how it turns out.