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This ProMag 22-round magazine pairs the capacity boost you're after with a build that matches factory design principles. The body uses DuPont Zytel polymer, which is durable and engineered to stay dimensionally stable through lots of shooting. What gives it real backbone is the full-length steel internal insert, stamped and welded the same way Glock does it on their factory mags.
You get an injection-molded follower and a spring made from heat-treated chrome silicon wire. That spring resists losing its tension over time, which matters when you leave a mag loaded between outings. The 22-round capacity gives you a substantial increase over stock Glock 21 and 30 mags if you're running extended sessions at the range or just want more rounds on hand.
These are made in the USA and backed by ProMag's lifetime warranty against defects. The black polymer finish is straightforward, and the magazine features numbered witness holes along the spine so you can glance down and know roughly how many rounds remain without unloading it. Some folks do report that the spring is pretty stiff on new mags, especially when fully loaded, so expect to feel some resistance loading that final round or two.
The ProMag GLKA17 is specifically designed for both the Glock 21 and Glock 30. That said, a few owners have reported tolerance or feeding issues in their specific guns, particularly when the magazine is fully loaded. If you encounter problems, check that the magazine isn't too loose in the magwell, and consider that the spring loosens slightly with use.
Factory Glock 21/30 mags are 13-round capacity, so this ProMag gives you 9 extra rounds. The build approach is similar: steel-lined polymer body, injection-molded follower, heat-treated spring. ProMag manufactures these in the USA and backs them with a lifetime warranty, though they're priced lower than OEM mags.
Yes, many users report the spring is quite firm on new magazines, especially when you're loading that final round or two. This is normal and the spring will loosen up with regular loading and unloading over time. If you find it genuinely difficult, some owners have had success running a few cycles of loading and unloading.
The numbered holes running down the spine of the magazine let you see at a glance how many rounds are loaded without having to unload it. Each hole represents roughly one round, giving you a quick visual round count.
ProMag backs all their magazines with a lifetime warranty against manufacturer defects. If the magazine fails due to a defect in materials or workmanship, ProMag will repair or replace it for free as long as you own it.
This magazine is designed for Glock 21 and 30 platforms. Some Glock-compatible firearms chambered in .45 ACP may work with it, but we recommend sticking with the Glock 21 and 30 to avoid fitment issues.
| UPC | 708279014758 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | GLKA17 |
| Brand Fit | Glock |
| Caliber/Gauge | .45 ACP |
| Capacity | 22 |
| Model | |
| Model Fit | G30 |
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