.22 Short Walther OSP Target Pistol. The Walther OSP is manufactured by Walther, it is a pistol chambered in the .22 Short caliber. The OSP was designed for the Olympic 25 m Rapid Fire Pistol event and became the perennial winner of the event. The pistol features a Morini grip, which places the bore at a lower level to reduce recoil. The barrel is weighted and ported, and felt recoil is virtually none. It comes with either a 2.2 lb (1,000 g) or 3 lb (1,400 g) trigger. 22 Short; 85% blue, excellent bore, fair grips, 4.5'' barrel, Manufactured in Germany, proof dated 1965. Original blued finish and modified walnut grips. Ported barrel with fixed front sight. Fully adjustable rear sight. Comes with two Factory Walther Mags.