You can use any pistol scope that you'd like. For a very inexpensive scope, I've had excellent service using an NCStar 2 1/2X, or, more costly, a Nikon Force 2X. The problem with pistol scopes are that, many times, they're set for, say, 100 yds. focus/parallax. If you're shooting less than that consistently, most single power (non-zoom) scopes allow for adjustment of the objective lens by loosening the locking ring and turning the lens counter-clockwise until the scope is in perfect focus at whatever distance you choose. Another inexpensive scope ($50) is the 2X Barska (sold by Barska on ebay). High rings make for easier loading of pellets. RC