• Machined 416R Stainless steel hardened to 40-42 HRC
• Cut Broached rifling that accepts both jacketed and lead bullets
• Barrels are chambered for full case support
• Easy drop in upgrade with occasional minor fitting required
• Includes manufacturer's guarantee

Liven up your Sig 40 Smith and Wesson with the drop in Storm Lake Barrels 357 Sig conversion kit . This precision barrel will convert your 40 Smith and Wesson pistol to the hot 357 Sig ammunition in seconds -- and you can do the conversion yourself. All barrels are machined from 416R stainless steel and hardened to 40-42HRC. Cut Broached rifling accepts all types of bullets and remains deadly accurate. Made in the USA by Storm Lake Barrels, all barrels include the manufacturer's guarantee of quality.