Up for sale or trade is a Glock 31 Gen 4 chambered in .357 Sig. It will come topped with tritium night sights and four 15 round magazines. 

Included in this package is a set of Hornady Custom Grade .357 Sig dies, a Lee Factory Crimp Die, and approximately 500 pieces of once fired brass. I also have about 150 rounds of loaded target ammunition, and about 100 rounds of Hornady Critical Duty ammunition 

If you are unfamiliar with this cartridge, it was designed to match .357 Magnum ballistics in a semi-automatic pistol. The designer accomplished this by necking down a .40 S&W/10 mm to accept a .356" bullet.