PMI-1.  The PMI-1 was an outgrowth of the PGP with a longer barrel and higher magazine capacity. Both were Sheridan-based guns distributed by Pursuit Marketing Inc. This gun has been modified with "side tapped" air (a hole was drilled and tapped in the valve chamber  for 1/8 inch NPT threads), a Crosman airgun stock with bottom-line adapter attached for a 4 oz. Co2 tank, a sight rail from a .68 Magnum (older direct feed modified PMI-1) and a 2x shotgun scope. Inset shows the gun with a commercially made silencer.