The SIG Pro is a series of semi-automatic pistols developed and manufactured jointly by Schweizerische Industrie Gesellschaft (SIG) and J. P. Sauer & Sohn. It was the first polymer-frame handgun from either company and one of the first pistols to feature a built-in universal accessory rail...Buy Sig Sauer P229 Barrels Factory replacement gun parts, accessories and gunsmithing service on most manufacturers including Browning, Winchester, FN America, Beretta, Benelli Franchi, Stoeger, Remington, Bushmaster, Marlin, Sig Sauer, HK and many more. USED Sig Sauer SP2022 | 40S&W, Black Finish, 1 Mag, No Box USED Sig Sauer SP2022 40 S&W SP2022 Pistol Buy Online | Guns ship free from Arnzen Arms gun store Site Menu About 15 years ago my dad (who is retired LEO) gave me a P229 with both the .40 and .357 barrel. Loved it. I ended up leaving it with a friend/co-worker and completely lost touch with him (long story.) Bought my SP2022 .40 right at a year ago. I honestly can't tell much of a difference.