MPN: G21H1 / G21H1B


  • Heat treated and vacuum tempered to 42 RC
  • Advanced proprietary button rifling process offer greater accuracy
  • Superior tolerances - drop-in for Glock 21 pistols, yet better fitment and lock-up
  • Fully supported SAAMI spec match chambers for shooting factory or reloaded ammunition
  • Finish that matches your style - available in Raw Stainless Steel finish and Black Nitride


  • Caliber: .45 ACP
  • Length: 4.6"
  • Material: 416-R Stainless Steel
  • Barrel Diameter: 0.627"
  • Outside Finish:
    • Black Nitride
    • Raw Stainless Steel - Matte grey chamber side with polish barrel
  • Weight: 3.99 oz.


  • Glock 21 (Gen 1 - 4)


Competition shooters want the best pistol barrels money can buy, but nobody wants to part with any more money than they have too. Fortunately for all of us, KKM Precision produces some of the most accurate barrels you can buy and allows us to offer them to the public at prices that make them an awesome value as well. If you’re in the market for a Glock 21 match barrel you can’t go wrong with a KKM Glock 21 barrel.

KKM Glock 21 Barrels Win

KKM Barrels are some of the most accurate barrels in the competitive shooting world. Shooters using KKM barrels have won almost every competition in the world and have set multiple records too. KKM Barrels have won NRA Nationals, the IPSC and IDPA World Championships, and the Bianchi Cup. If you want a drop-in Glock 21 match barrel from a proven winner you want a KKM Glock 21 barrel.

KKM Precision is Accurate by Design

When KKM was founded in the 1990s their sole intent was to produce barrels for the competition pistol market. They have poured 20 years of experience and pursuit of cutting-edge manufacturing processes to bring the small arms community barrels that are born and bred for accuracy.

Every KKM Glock 21 barrel begins a piece of certified barrel quality 416R barrel stock. KKM precision machines each piece on state-of-the-art 4-axis CNC machines. They’re button rifled to produce a rifling pattern that distorts bullets less than other types of rifling and we know that a better bullet is more accurate. Teaming the button rifling process with the supreme accuracy of the SAAMI chamber produces match barrels that can produce groups half the size of the competition in the right hands. Make those hands yours, choose a KKM Glock barrel.



This product is not manufactured, authorized, endorsed, or warranted by GLOCK. GLOCK does not warrant or represent that this product is compatible with GLOCK pistols.

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