Lone Wolf AlphaWolf 9mm conversion barrel for Glock 22 and Glock 31 host pistols. Drops into Gen 3 and Gen 4 G22 (.40 S&W) or G31 (.357 SIG) frames and converts them to 9mm — same slide, same magazine well, cheaper range ammo. Fluted and threaded profile in a stock-length barrel.

Salt-bath nitride finish over 416R stainless steel. Nitride hardens the surface after machining, which cuts wear on the lockup and locks the fluting geometry in place across long round counts.

Barrel specs:

• Caliber: 9mm (converts .40 S&W G22 or .357 SIG G31 to 9mm)
• Fit: Glock 22 Gen 3-4, Glock 31 Gen 3-4
• Length: Stock G22/G31 length
• Muzzle threads: 1/2x28 (thread protector included)
• Finish: Salt-bath nitride on 416R stainless
• Profile: Fluted

Setup notes: Because you're converting from .40 or .357 SIG to 9mm, you need a 9mm magazine — either a Glock 17 mag, or a 9mm-specific G22/G31 mag. The G22/G31 slide and extractor will run 9mm without modification, but confirm ejection with the first 50 rounds and check that the extractor claw is picking up cases cleanly. The 1/2x28 muzzle pitch mates with any standard 9mm compensator, thread protector, or direct-thread suppressor.

Use notes:

• Not for Glock 33 or subcompact platforms — full-size G22/G31 only
• Not for Gen 5 G22/G31 (different barrel dimensions)
• Break in with 100 rounds of 115 or 124 gr FMJ before defensive use
• Fluting is decorative + heat-shed; groups aren't degraded vs a smooth OEM-profile barrel

Clean the bore before first use and re-verify point of impact after conversion — a 9mm conversion can shift zero from the original .40 or .357 SIG configuration.

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