The rifle does not use the 12 gram cartridge. It does have the standard 3/8" sight rail to mount a scope to.
Crosman is proud to introduce to the world the latest and greatest in competition airguns; the all new Challenger PCP. This Sporter Class air rifle was recently reviewed by the National Three-Position Air Rifle Council's committee and was approved as legal for use in Sporter Class air rifle competition.
The Challenger PCP kept the adjustable stock and ambidextrous bolt handle from the wildly popular Challenger 2000, but now includes a patented integral locking mechanism. Additionally, the completely re-designed feature set includes a two-stage, match grade, adjustable trigger and a Lothar Walther barrel for unsurpassed accuracy. The gun comes equipped with the ability to operate on either CO2 or compressed air, using Crosman's highly successful PCP platform.
Combine all of this with a visible pressure gauge and user friendly loading port, and the Challenger PCP becomes a gun that all competition shooters, young and old, can be proficient with in any shooting event. Only from Crosman, the world leader in airgun innovation since 1923.