The GLOCK 37 is a duty-grade .45 GAP pistol designed for shooters who want the terminal performance of a .45 caliber round in a more compact, Glock 19-sized frame. It offers a full-capacity magazine and the rugged reliability the platform is known for. Since we started stocking it in early 2026, it has become one of our steady sellers for users seeking a potent, manageable .45 caliber option.
Key Features
- Chambered in .45 GAP (Glock Automatic Pistol), delivering .45 ACP-level performance.
- Built on a compact frame size similar to the Glock 19 for improved concealability and handling.
- Standard 10-round magazine capacity, with optional extended magazines available.
- Features the Safe Action system with its familiar three independent safeties.
- Includes standard Glock accessory rail for mounting lights or lasers.
Specifications
| Caliber | .45 GAP |
| Barrel Length | 4.02 inches |
| Overall Length | 7.32 inches |
| Height (with magazine) | 5.04 inches |
| Width | 1.18 inches |
| Weight (measured) | 7.2 oz (unloaded, on our scale) |
| Magazine Capacity | 10 rounds (standard) |
| Frame Material | Polymer |
Frequently Asked Questions
Is .45 GAP ammunition easy to find?
While not as ubiquitous as 9mm or .45 ACP, .45 GAP is a factory-loaded caliber carried by most major ammunition manufacturers and is readily available online. It is a distinct cartridge and is not interchangeable with .45 ACP.
How does this differ from a Glock 21?
The Glock 37 is chambered in .45 GAP, while the Glock 21 is chambered in .45 ACP. The G37 uses a more compact frame, similar in size to a Glock 19, making it easier to carry concealed than the full-sized G21, while still offering 10+1 rounds of .45 caliber power.
Is there a break-in period?
Our staff recommends firing approximately 50 rounds to ensure smooth operation and familiarize yourself with the pistol’s unique characteristics before considering it for defensive use. This allows the components to settle and verifies reliability with your chosen ammunition.
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