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  • Double Diamond Threaded Barrel

Double Diamond Threaded Barrel

$159.99 to $229.99
SKU: 1001
$159.99 to $229.99
Extended Length Threaded Barrels to accept a Ported Compensator.

Includes a Thread Protector with purchase.

Please note: Not compatible with Gen 5 Glocks.
GSPC match grade replacement barrels are manufactured from the highest grade 416R stainless forgings. CNC machined and heat treated, providing a life time of service and unparalleled 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 factory ported or stock pistols.

Thread Pitch Measurements:
  • 9mm (17, 19, 26, 34) - 1/2x28
  • .40S&W (22, 23, 27, 35) - 9/16x24
  • .10mm (20) - 9/16x24
  • .45ACP (21, 30) - .578x28
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 and bore
  • Match grade broach cut rifling and target crown
  • Fits Glock Gen 1-4 (does not fit Gen5)
  • Maximum chamber support
  • Improved feed ramp design
  • Diamond turned exterior
  • Okay to use lead, plated or jacketed bullets

GSPC will replace any of our 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 to verify quantities.

Not available for export outside the United States.

Barrels may only be returned if they are unused and in resellable condition. If the item is defective, ie, does not fuction, we will accept a return within the 30 day period only.

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

5 reviews

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Bed will be buying more


Fits great for my Glock 34 gen 4 looks great!

Outstanding BARREL and Customer Service


Outstanding service great barrel. Due to tight tolerance I had to install the slide with magazine well pointing to the ceiling (upside down from normal) I had to call customer service to figure this out thanks John N. Only fired about 25 rounds thru new barrel but I am very impressed with how the gun feeds and much better accuracy than OE. Polished ramp is amazing!!!

Noticeable difference


Works great noticable difference in accuracy along with my other mods in my gen 3 g22. Good buy.

Great quality


Fit perfectly and works great in my G19 gen 3

Best Group I Ever Shot!


I build competition level firearms for 3Gun, USPSA, IDPA, and IPSC. I'm not easily impressed and don't usually take the time to write a review for purchased components.

I expect 2" groups out of most pistols. And today, that all changed! I took a new 3Gun pistol to the range for its first test firing. One of the used components for this Glock 34 was a Double Diamond threaded stainless steel barrel.

I walked the Vortex Venom shots into a bullseye setting and then fired 3 rounds on a fresh target and checked it out. I then fired 7 more shots and ended up with a 10 round 1" group! For me, that's the very best group I've ever had with any pistol!

All future builds will have this barrel!!!