Description
Leapers UTG has been in the business of making solid, no-nonsense shooting accessories since 1992, and their GL933 magazine is a good example of what they do well: a well-built product at a price that doesn't make you wince when you're buying several.
The body is constructed from glass-fiber reinforced polymer in matte black, which gives it real impact resistance without adding unnecessary weight. Inside, you get a high-visibility blue anti-tilt follower paired with a high-longevity stainless steel spring. That combination keeps rounds feeding smoothly and helps prevent the nose-down tilting that can cause jams in extended-capacity magazines. Round count indicators are marked on both the left and right sides at 10, 15, 20, 25, and 33, so you can do a quick glance check without having to pull the mag.
The floor plate is removable and flared, which makes disassembly for cleaning straightforward, and the magazine is compatible with reversible magazine releases for both left- and right-handed setups. At 9.5 inches overall, the mag extends below the grip as you'd expect from any 33-rounder, but it's a natural fit with most Glock-pattern PCC builds where that length isn't an issue.
Compatibility covers the full range of Glock 9mm double-stack pistols including the G17, G19, G19X, G26, G34, and G45, as well as Glock-compatible pistol-caliber carbines and pistol clones. It does not fit single-stack models like the G43, G43X, or G48. If you're running a Sub-2000, AR-9, Extar EP9, or Ruger PC Carbine with a Glock mag well, this works in those platforms too.
Key Specifications
- Manufacturer: Leapers (UTG)
- MPN: RBT-GL933
- UPC: 4717385556942
- Caliber: 9mm Luger (9x19mm)
- Capacity: 33 Rounds
- Overall Length: 9.5 inches
- Body Material: Glass-fiber reinforced matte black polymer
- Spring Material: Stainless steel
- Follower: Anti-tilt high-visibility blue follower
- Round Count Indicators: Left and right side at 10, 15, 20, 25, and 33 rounds
- Floor Plate: Removable flared floor plate
- Magazine Release Compatibility: Compatible with reversible magazine release
- Compatible Pistols: Glock G17, G19, G19X, G26, G34, G45 (9mm double-stack)
- Color: Matte Black
- Shipping Weight: 0.2 lbs
What’s Included
- 1x Leapers UTG GL933 33-Round 9mm Polymer Magazine
Frequently Asked Questions
Which Glock models does the UTG GL933 fit?
This magazine is designed for Glock 9mm double-stack pistols, specifically the G17, G17L, G19, G19X, G26, G34, and G45. It will not fit single-stack Glock models like the G43, G43X, or G48, since those use a narrower magazine well. When in doubt, if your Glock takes a double-stack 9mm mag, this should work.
Will this magazine work in a pistol-caliber carbine or AR-9?
Yes, it is built to work with Glock-compatible pistol-caliber carbines and pistol clones in addition to handguns. Platforms like the Kel-Tec Sub-2000 (Glock mag well version), Ruger PC Carbine, Extar EP9, and AR-9 builds configured for Glock-pattern mags are all common fits. Just verify your PCC is set up for Glock double-stack mags before ordering.
How does the UTG GL933 hold up compared to factory Glock magazines?
The GL933 uses glass-fiber reinforced polymer and a stainless steel spring, which gives it solid build quality for an aftermarket option. The anti-tilt follower addresses one of the more common failure points in extended-capacity magazines. Users running it in both handguns and PCCs have reported reliable feeding with no issues, and the fit and finish are consistent with what you'd expect from a quality aftermarket mag.
Can I disassemble this magazine for cleaning?
Yes, the floor plate is removable and flared for easy disassembly. This lets you take the mag apart, clean out carbon or debris, inspect the spring and follower, and reassemble without any special tools. Regular cleaning is always a good habit with extended-capacity magazines.
Does the UTG GL933 work for left-handed shooters?
It is compatible with reversible magazine releases, which means it can be set up for right- or left-handed use. The round count indicators are also on both sides of the magazine body, so lefties get the same quick-check convenience as right-handed users.
Is this the same magazine as the UTG windowed version?
No, these are two different products. The RBT-GL933 is the standard non-windowed version with a solid polymer body. Leapers also makes the RBT-PD933, which features a clear window panel on the side for a visual round count check. Both share the same capacity and core specs, but the GL933 keeps things simpler with the traditional opaque body.




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