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Blemished Double Diamond G20 10mm-.40S&W Conversion Barrel

$109.95 $129.95
SKU: 1235
Our goof is your gain! Save on ammo and your upgrade with our Blemished Double Diamond G20 Barrels!

A batch of these barrels were incorrectly stamped as .40 - 10mm. All blemishes are purely aesthetic and in no way affect performance! Order quickly, once this batch is gone, they're GONE! Please note that these barrels are only designed to fit Glock 20's, and only accept .40 S&W ammo.

Designed to allow shooters to change calibers by simply dropping in one of these conversion barrels; in conjunction with the appropriate caliber magazine. The barrel is cut to fit in the ejection port of the intended slide. Swapping out recoil guide rods, ejectors, extractors, or strikers is not necessary.

Please note: Not compatible with Gen 5 Glocks
GSPC match grade replacement barrels are manufactured from the highest grade 416 stainless steel forgings. CNC machined and heat treated, providing a life time of service and better-than-factory accuracy at an affordable price.

The standard groove and land rifling make this an excellent choice for those who wish to shoot lead, plated or jacketed bullets. Can be used in "C" model (compensated) Glocks, in addition to standard Glocks.

Special features include:

• Ready to use, pre-fit, drop-in
• No gunsmithing required
• Precision machined from heat treated 416R stainless forgings
• Oversized lock-up area produces greater shot-to-shot accuracy
• Tighter than factory spec dimensions
• Polished feed ramp, bore and chamber
• Match grade, broach cut rifling and target crown
• Maximum chamber support
• Diamond turned exterior
• Okay to use lead, plated or jacketed bullets


GSPC will replace any of its barrels or barrel accessories which are found to have manufacturing or material defects. Customer modifications or the use of reloaded ammunition will void this warranty.

Please note: In-stock availability of our GSPC barrels may be limited. If your order is time sensitive, we recommend contacting us verify quantities.

Not available for export outside the United States.

Order Online or Call Toll Free: 1-800-601-8273

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