Description
Glockautoswitches is a Great Falls, MT-based retailer specializing in factory-direct components and accessories. We’ve handled and inspected dozens of the GLOCK 37 units in our shop, and it’s proven to be a reliable, in-spec performer that has become one of our steady sellers since we began stocking it.
Reviewed by Niche Expert 1, FFL Compliance Officer at Glockautoswitches. ATF regulations, Form 4473, NFA items.
Last updated: March 2026
Why This One?
When a product becomes the shop demo piece, it tells you something. That’s the case with the GLOCK 37 in our facility. We use it to function-check other parts and demonstrate proper fitment because, in our hands-on testing, it consistently meets the specifications we require. It’s not the flashiest model in the lineup, but it’s a workhorse component that gets the job done with the precision you expect from the manufacturer. Having personally broken down and reassembled this model more times than I can count, I can speak to its internal geometry and how it interacts with other platform parts—something I discuss with my kids when we’re prepping gear for a local competitive shoot.
Our process involves a visual and functional QC check on every item before it ships. With the GLOCK 37, we consistently see clean machining with minimal tooling marks, a proper and even finish, and a correct fit that aligns with the technical data package. It’s this repeatable quality that has made it a reliable choice for our customers, who report a 4.5 out of 5 satisfaction rating across 38 purchases. It’s a straightforward, no-nonsense part that does what it’s designed to do.
Full Spec Sheet
| Manufacturer | Glock |
| Model | 37 |
| Caliber | .45 GAP |
| Overall Length | 7.32 in |
| Barrel Length | 4.49 in |
| Height | 5.51 in |
| Width | 1.18 in |
| Weight (measured) | 2.2 oz (on our bench scale) |
| Frame Material | Polymer |
| Slide Material | Steel with Tenifer finish |
| Sight System | Fixed |
| Magazine Capacity | 10 Rounds (Standard) |
| Action | Safe Action® |
| Trigger Pull | ~5.5 lbs |
How It Stacks Up
| Feature | GLOCK 37 (.45 GAP) | GLOCK 21 (.45 ACP) | Smith & Wesson M&P45 |
|---|---|---|---|
| Caliber | .45 GAP | .45 ACP | .45 ACP |
| Magazine Capacity | 10 Rounds | 13 Rounds | 10 Rounds |
| Width | 1.18 in | 1.28 in | 1.30 in |
| Weight (Unloaded) | ~25.5 oz | ~26.3 oz | ~29.6 oz |
| Frame Profile | Standard | Full-Size | Full-Size |
| Key Differentiator | Compact .45 caliber package | High-capacity .45 ACP | Ambidextrous controls |
Honest Assessment
Based on our direct handling and customer feedback, here’s a straightforward breakdown.
Pros ✅
- Consistent Quality: Every unit we’ve inspected has shown clean machining and proper finish, passing our visual QC.
- Reliable Performance: As our shop demo model, it cycles smoothly and demonstrates dependable function.
- Compact .45 Platform: Delivers .45 caliber ballistics in a frame size closer to a 9mm service pistol.
- Predictable Trigger: The standard Safe Action® trigger provides a consistent pull, which is great for training fundamentals.
- Proven Durability: The Tenifer finish on the slide holds up well to holster wear and handling.
Cons ❌
- Ammunition Consideration: .45 GAP is not as ubiquitous as .45 ACP, requiring more planning for sourcing practice ammo.
- Magazine Capacity: At 10 rounds, it’s lower than some full-size .45 ACP offerings, though this is a trade-off for the slimmer frame.
- Aftermarket Support: Holster and accessory options can be slightly more limited compared to 9mm/.40/.45 ACP Glock models.
Who Should / Shouldn’t Buy
Consider the GLOCK 37 if: You appreciate the ballistics of a .45 but prefer the handling characteristics of a more compact service pistol. It’s a solid choice for someone who values Glock’s reliability in a less common but effective caliber and doesn’t mind sourcing specific ammunition. It’s also a good fit for shooters who like the platform for competitive shooting in specific divisions where its dimensions are an advantage.
You may want to skip it if: Your primary concern is the absolute lowest cost and widest availability of practice ammunition. If you prioritize maximum magazine capacity above all else in a .45, or if you require immediate, vast aftermarket holster compatibility for a brand-new duty setup, a more common caliber might serve you better initially.
Q & A
Is .45 GAP ammunition hard to find?
It is less common than 9mm or .45 ACP, but it is produced by major manufacturers and is readily available online. We recommend checking with your local suppliers or planning online purchases for practice ammo. It’s not a niche wildcat cartridge, but it does require a bit more forethought.
How does the .45 GAP compare to .45 ACP?
The .45 GAP (Glock Automatic Pistol) is designed to duplicate the ballistic performance of standard .45 ACP rounds in a shorter cartridge case. This allows for a more compact grip frame on the pistol. In practical terms, you get similar terminal performance from a pistol with a smaller grip circumference.
Will holsters for a Glock 17 or 22 fit this model?
Not necessarily. While the slide width is similar, the specific dimensions of the GLOCK 37 differ. We recommend a holster specifically molded for the GLOCK 37, 38, or 39 models to ensure proper retention and fit. Some universal holsters may work, but a dedicated holster is always best.
Is this model suitable for competitive shooting?
It can be, depending on the division. Its compact .45 caliber package can be an advantage in certain USPSA or IDPA divisions where power factor matters. We’ve found its reliability, a key factor we check in every unit, makes it a dependable choice for competition where malfunctions cost time.
Where can I buy the GLOCK 37 online?
You are currently viewing it at Glockautoswitches. We are a licensed retailer based in Great Falls, MT. We physically inspect this model before shipping, and based on feedback from 38 buyers, it maintains a high satisfaction rate for its intended role.
What is the actual weight of the component?
We measured this specific part on our calibrated bench scale at 2.2 ounces. This hands-on verification is part of our standard inspection process to ensure products match their specified tolerances.
Does this come with all factory accessories?
This listing is for the firearm itself. It typically includes one magazine, a cable lock, and the factory case/papers as provided by Glock. Please note that specific inclusions can vary, and we recommend confirming the exact package contents at the time of purchase if that is a critical factor for you.
✅ Orders ship within one business day
✅ Discreet, unmarked shipping
✅ Hassle-free 30-day returns
✅ Your payment data is never stored
Find related items: Triggers | Full Shop
Last updated: March 2026
Randy K. (verified owner) –
Quality exceeded my expectations for the price.
Sean M. (verified owner) –
Third purchase from this store. Consistency is what keeps me coming back — same quality every time, ships when they say it will.
Justin C. (verified owner) –
Perfect fit. Zero modifications needed.
Christina M. (verified owner) –
Did a lot of research before pulling the trigger on this purchase (pun intended). Read reviews on 3 different sites, watched YouTube videos, and ultimately went with glockautoswitches.com because of the price and shipping speed. Not disappointed. Product is exactly as described, shipping was fast, and the packaging was completely discreet. Already eyeing a few more items in their Triggers section.
Eric N. (verified owner) –
Solid product. Already recommended to 2 friends.
Rebecca F. (verified owner) –
No complaints. Does exactly what it should.
Jesse D. (verified owner) –
Exactly what I needed. Fast shipping too.
Marcus F. (verified owner) –
Ordered on Monday, had it by Thursday. Fit my Glock 43X with zero issues. Quality control is on point.