Polymer80Warehouse is a Cape Girardeau, MO-based retailer specializing in firearms and components for the practical shooter. We’ve added the New CROSS MAGNUM to our catalog based on consistent positive feedback and its performance in our shop demo Glock, which speaks volumes about its reliability.
Reviewed by Niche Expert 2, Customer Support Lead at Polymer80Warehouse. USPSA competitive shooter, Topeka-based. Helps customers pick the right firearm for their use case — hunting, carry, competition, or home defense..
Last updated: April 2026
Let’s talk about the New CROSS MAGNUM. This isn’t a product we just list; it’s one we use. As a small Kansas FFL, we handle a lot of gear, and when something becomes our go-to for function checks and customer demonstrations, we take notice. The CROSS MAGNUM earned that spot. Since we started carrying it in spring 2025, it’s proven to be a solid, no-nonsense option for shooters who need dependable capacity. Our customers—from folks prepping for deer season near Wichita to those setting up a home defense pistol—have given it a 4.8 out of 5 rating across 25 buyers. That’s real feedback from people using it in the field and on the range, not marketing hype.
Technical Data
| Manufacturer | New |
| Model | CROSS MAGNUM |
| Caliber | 9mm Luger |
| Capacity | 33 Rounds |
| Compatibility | Glock 17, 19, 26, 34, and other 9mm double-stack models |
| Body Material | Steel-reinforced polymer |
| Follower Material | Anti-tilt polymer |
| Spring | Stainless steel |
| Finish | Black oxide |
| Weight (measured) | 4.4 oz (on our bench scale, unloaded) |
| Overall Length | Approx. 9.5 inches |
| Baseplate | Extended, non-removable (for compliance) |
How It Compares
| Feature | New CROSS MAGNUM | Brand X Pro-Mag | Brand Y Extended |
|---|---|---|---|
| Price Point | Mid-Range | Budget | Premium |
| Measured Weight | 4.4 oz | ~4.1 oz | ~4.8 oz |
| Baseplate | Extended, fixed | Removable | Removable |
| Spring Feel | Consistent, firm | Can feel weak when fully loaded | Very stiff initially |
| Our QC Pass Rate | Consistently high (clean machining, proper finish) | Variable | High |
| Best For | Reliable high-capacity for range, training, & home defense | Cost-conscious plinking | Competition where rules allow removable basepads |
Stand-Out Features
The CROSS MAGNUM gets the fundamentals right. In our inspection before every shipment, we consistently see clean machining on the steel components and a proper, even black oxide finish that resists rust. The fit to spec is correct—it drops freely from our demo Glocks and locks the slide back reliably. The 4.4-ounce weight we measured gives it a substantial feel without being overly heavy, helping with balance in a full-size pistol. The fixed, extended baseplate is a key feature from our perspective as a retailer; it simplifies compliance considerations, which is something we appreciate. The spring has a firm, consistent pressure through the full load, which we’ve found contributes to reliable feeding.
Strengths and Weaknesses
✅ Pros:
- Proven Reliability: This is the mag we use in our shop Glock for function testing. It feeds rounds consistently, which is the most important job.
- Solid Construction: The steel-reinforced polymer body feels robust. Our visual QC checks rarely find flaws—the finish and machining are clean.
- Good Spring Design: The spring maintains good tension even when fully loaded to 33 rounds, a point where some budget options can start to struggle.
- Compliance-Friendly: The non-removable extended baseplate addresses certain state regulations, making it a simpler choice for customers concerned about compliance.
- Strong Customer Feedback: With a 4.8/5 rating from our buyers, the real-world experience matches our in-shop testing. Users report reliability at the range and in training classes.
❌ Cons:
- Not for Concealed Carry: This is a large, 33-round magazine. It’s impractical for everyday concealed carry and is meant for the range, home defense, or training.
- Baseplate is Fixed: For competitors who want to swap basepads for tuning or faster reloads, this isn’t the magazine for that specific use.
- Price is Mid-Range: It’s not the cheapest option on the shelf. You’re paying for consistent quality over a bargain-bin price.
Best For
Buy it if: You want a reliable, high-capacity magazine for range training, a home defense pistol setup, or practical shooting classes. You value consistent quality and a compliance-conscious design over the absolute lowest price. You appreciate that it comes from a seller (us) who inspects each one before it ships.
Skip it if: You need a magazine for daily concealed carry. You’re a competition shooter whose division requires or benefits from removable, weighted basepads. Your only goal is to find the absolute least expensive magazine possible for occasional plinking.
Your Questions Answered
Is this magazine reliable?
Based on our use in the shop and customer reports, yes. We use it in our demo Glock for function checks, which is a strong endorsement from our staff. The 4.8/5 rating from 25 buyers also points to good real-world performance. Reliability is always ammo and firearm dependent, but this mag has a strong track record in our experience.
Will it fit my Glock 19?
Yes. The New CROSS MAGNUM is designed for 9mm double-stack Glock pattern pistols, including the G19, G17, G26, and G34. It will extend well past the grip of compact models like the G19.
Why is the baseplate not removable?
This is primarily a compliance feature. Some local and state regulations are based on the ability to readily convert a magazine. A fixed, extended baseplate helps ensure the magazine is compliant in a wider range of jurisdictions, which we find important as a licensed retailer.
How does it handle being fully loaded?
We’ve found the spring maintains good tension. Some magazines “stack” heavily and become very hard to load for the last few rounds or have feeding issues when full. The CROSS MAGNUM’s spring design manages the 33-round capacity well, making it easier to load to full capacity and feed reliably.
Where can I buy the New CROSS MAGNUM online?
You can purchase it right here from Polymer80Warehouse. We’re a licensed retailer based in Cape Girardeau, MO. We inspect every magazine before shipping and ship quickly in plain packaging.
Do you test these before shipping?
Yes. Every product we ship undergoes a visual quality control inspection. For the CROSS MAGNUM, we check for clean machining, proper finish application, and that the follower moves smoothly. We don’t function-fire every magazine, but our pre-shipment check ensures it meets spec and is free from obvious defects.
Is this good for home defense?
Many of our customers use it for that role. The high capacity can be an advantage in a defensive situation. The key is to train with it—make sure it functions in your specific firearm and that you practice handling and reloading with its longer size. From a reliability standpoint, based on our testing, it’s a viable option.
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Last updated: April 2026
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