Brownells 75th Anniversary - A Shooting Heritage

A Drop-In .40 S&W to 9mm Conversion Barrel for Your G23

The Brownells Match-Grade Conversion Barrel enables you to switch your .40 S&W chambered Glock® 23 to shoot 9mm Luger (9x19mm) ammo AND also improve its accuracy potential at the same time. It fits Gen1 through Gen4 variants of the Glock® 23, and will be a drop-in install on most guns.

Each conversion barrel is machined from 416R stainless steel alloy to precise dimensions to ensure a tight lockup and long service life. Button-rifled with 1-10" right-hand, 6-groove rifling that is compatible with inexpensive "practice" ammo that has non-jacketed bullets. The hard Black Nitride finish resists surface wear and stops in its tracks whatever corrosion might try to challenge the stainless steel.

Available with either a Plain muzzle or Threaded (1/2"-28 tpi) to enable installation of a compensator or sound suppressor. Both have an 11-degree target crown, and each is laser engraved with the chambering and the Glock model it fits.

  • Fits Glock® 23 Gen1 thru Gen4
  • G19-compatible 9mm magazine required to complete the conversion (not included)
  • Extra-strong 416R stainless steel alloy
  • Matte black Nitride anti-corrosion finish
  • Button-rifled 1-10" twist
  • Threaded model has 1/2"-28 tpi threads

If you have an old Glock® 23 with a shot-out factory barrel, give it a new lease on life. Swap in a Brownells match-grade conversion barrel and enjoy the gentler recoil AND lower cost of 9mm ammo. Remember: to complete the conversion, you will need to add a Glock 19 compatible 9mm magazine.

Big Book Catalog, Issue:73, Page:221


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Cartridge: 9 mm Luger

Finish: Black Nitride

Style: Non-Threaded

Backorder, See Associate
Out of Stock

Cartridge: 9 mm Luger

Finish: Black Nitride

Style: Threaded