The fast-shooting Model 12 proved to be a natural for small-game hunting, and a significant percentage of purchasers were hunters, who wandered the woods and fields in search of rabbits and squirrels for the pot, and farmers, who used them to dispose of pests, such as groundhogs, raccoons, and crows. The inner tube was then pushed back and locked in place, exerting spring pressure on the foremost cartridge in the magazine for feeding into the receiver. The Model 12's magazine was loaded by depressing a catch on the knurled end cap, which allowed the inner tube that contained a spring-loaded follower to be withdrawn forward and exposed an opening just in front of the forearm into which individual cartridges were inserted base-first. 22 was released on the market in 1909 as the Model 12 Slide Action Repeater. These features not only gave it a slim, streamlined appearance, but they sealed the action against dirt, debris, and moisture far better than the competition's rifles.
It also differed from the Winchester in that it had a solid-top receiver, and cartridge ejection was via a port on the right side of the receiver. 22s, Pedersen's rifle was a hammerless design with a safety button located at the rear of the trigger guard, and the rear of the receiver tang was drilled and tapped for mounting an aperture sight. A locked bolt could be released by depressing a button located inside the trigger guard. At the same time the trigger/sear lock and the firing pin were freed so the rifle could be fired. As the bolt went into battery, the action bar pushed it up, locking it in place. As the rear of the tube entered the receiver, a carrier lifted the next round from the magazine so the forward-moving bolt could chamber it. It then pushed the bolt to the rear, extracting and ejecting the spent cartridge. As the forearm/magazine tube unit was pulled to the rear, an action bar on the end of the tube retracted the firing pin and then pulled the bolt down, retracting a locking shoulder on its front edge from a mortise in the top of the receiver.
Pedersen designed a rifle in which the forearm was attached directly to the magazine tube.
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