SIG Sauer P220 ST Joint Combat Pistol Program Prototype Pair

Two pistols, built side by side, that never made it past the factory gate. These are SIG Sauer's own internal prototypes for the U.S. Joint Combat Pistol Program, the short-lived USSOCOM effort that ran from late 2005 into early 2006 looking for a .45 ACP sidearm to replace the M9. SIG Sauer Germany developed this pair specifically for that competition, and they carry consecutive prototype V-numbers. Those V-prefix numbers are how SIG marks internal development guns. They rarely leave the company, and finding two in sequence is the kind of thing that almost never happens.

What sets these apart starts with the trigger systems. One wears a DAK setup, the Double Action Kellermann system, paired with a manual safety. The other runs a conventional SA/DA trigger, also with a manual safety. Neither combination exists on any production SIG. The safety levers themselves are stamped sheet metal, left and right, where the Classic line uses milled or MIM parts. Look at the slides and you'll see P220 ST stamped on the right side, the blued sheet metal slide riding an inside extractor. The frames are German made, wearing the CIP proof and the desert tan finish the JCP program called for, with that distinctive Picatinny rail molded into the dust cover.

The grip plates are German polymer, cut to clear the manual safety, with the SIG Sauer and P220 logos molded in. Both pistols show light handling marks on the slide flats and bright bores. The .45 Auto chambering reads clearly through the inspection ports.

The pair comes with the original SIG Sauer factory boxes, both labeled P220-1 .45 KV PGS MS, a SIG Sauer factory letter addressing the slide markings, and supporting documentation laying out the JCP history and the features that separate these from any commercial P220. For a SIG collector chasing prototypes, a documented consecutive JCP pair is about as deep as the well goes.