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Double Diamond 10mm to .40 S&W Conversion Barrels
1 × $169.99
Subtotal: $169.99
Double Diamond .45ACP to 10mm Conversion Barrels for Glock
$59.95
One Glock, Two Calibers!
Easily convert your .45 Caliber Glock to shoot 10mm in seconds!
Designed to allow shooters to change calibers by simply dropping in the Double Diamond conversion barrels in conjunction with the appropriate caliber magazine. The barrel is cut to fit in the ejection port of the intended slide. Basically, it’s a .45 caliber barrel on the outside chambered in 10mm … brilliant!
Swapping out recoil guide rods, ejectors, extractors, or strikers is not necessary.
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.
Fits Gen1-4 models.
The “30/30SF” option will NOT fit the G30S.
Not available for export outside the United States.
Want to convert your 10mm to .40S&W?
Click here!
Need to switch your .40S&W to 9mm?
Click here!
5 reviews for Double Diamond .45ACP to 10mm Conversion Barrels for Glock
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Arant –
Works well in my Glock 41 with the original extractor. I am too old to dare to compare accuracy between different Glock barrels, but this one is fine.
Andrew –
I appreciate the date counter on Glockstore’s website. It sets the bar for literally every other online businesses. I had a little difficulty getting me order but the helpful customer service was excellent at getting me squared away. The barrel itself appeared to be manufactured like the other barrels that used to be on the market. A little to tight of tolerances created initial feeding issues. I did some research and discovered that Glock 29 barrels have a shallower angle on the feed ramp that extends slightly into the chamber. There’s also much more of a bevel around the chamber entrance on the oem barrel than the double diamond barrel. So I took a risk and little by little milled the chamber entrance and feed ramp. Now I have no feed issues and a successfully converted Glock 30 10mm. I HIGHLY recommend getting a Tungsten 23lb recoil spring cause the recoil from 10mm kinda sucks on a mini Glock.
Greg M –
Drop in fit for my G 21 Gen 4. Only other thing I had to buy are G20 magazines and I was ready to shoot. No other parts had to be changed. No issues with function. Accuracy was at least as good as it was with 45 ACP barrel. I believe it shot more accurate, but I haven’t compared targets as of yet. Main issue I was concerned with was function and recoil. Standard recoil spring seemed to be sufficient with the different ammunition I tried. I ordered and waited for back order to arrive. It was about a 3 week wait until the barrel was in my mailbox. Barrel appeared to be very high quality. Very happy with my purchase.
MP –
Outstanding quality with perfect fit and finish. Drops in and works great. I did not have to change the extractor or recoil spring (the 30 and 29 use the same spring rating), with only a G29 magazine necessary. Outstanding customer service with lighting fast shipping and great communication.
Eugene –
Dropped into my G21 slide no problem. I’ve only put 100 rounds through it so far but had zero feeding issues.