RUGER MKII/III WALNUT GRIPS
MKII: Introduced in 1982 to replace the MKI series, this perpetuated the differing models – MKII Target and MKII Bull Barrel, but incorporated a new magazine catch, an improved magazine, a new hold-open catch, a modified trigger and a refined safety catch.
MKIII: The pistol’s barrel is made from steel bar and is threaded into the receiver which is made from steel tube. The barrel is not removable without machining, though. The layout is similar to the Luger P08, although the operating mechanism was originally copied from the Nambu pistol.