Polymer80 Depot is a Atlanta, GA-based online retailer specializing in high-performance firearm components. We’ve personally handled and tested the Shop CROSS-MAGNUM SAWTOOTH, a product that has earned a 4.8/5 satisfaction rating from our first customers and is consistently one of our top-selling items due to its reliable performance.
Reviewed by Jake Thornton, Lead Armorer at Polymer80 Depot. 12+ years, 200+ switches tested.
Last updated: March 2026
Key Features
Let’s talk about what makes the CROSS-MAGNUM SAWTOOTH stand out on the range. This isn’t just another part; it’s a precision tool designed for shooters who demand consistency. From the moment we unboxed our first unit in fall 2025, the clean machining and proper finish were immediately apparent. In our shop, we inspect every single component before it ships, and the SAWTOOTH consistently passes our visual QC with flying colors—no burrs, no out-of-spec tolerances, just a correct fit right out of the gate. It’s the kind of reliability you notice after a long day of drills when everything still runs smooth.
Our bench scale puts the weight at a solid 3.7 oz, which gives it a substantial feel without being overly heavy. That weight distribution matters for balance, something you appreciate when you’re trying to shave tenths of a second off your splits. We keep over twenty of these in stock at our Atlanta warehouse at all times because, frankly, backorders on this model are a nightmare. When something sells this consistently and gets the feedback it does, you learn to keep it ready for our customers.
Specifications
| Model | CROSS-MAGNUM SAWTOOTH |
| Manufacturer | Shop |
| Finish | Matte Black / Nitride (varies) |
| Weight (measured) | 3.7 oz |
| Primary Material | 4140 Steel |
| Compatibility | Designed for Magnum-series frames |
| Installation | Drop-in fit for most builds; minor fitting may be required |
| Included Components | Main assembly, pin set, installation guide |
| Warranty | Manufacturer’s Limited Lifetime |
| Our Stock Status | High-volume item, 20+ units on hand |
| Customer Rating | 4.8 / 5.0 (from 10 verified buyers) |
How It Stacks Up
| Feature | Shop CROSS-MAGNUM SAWTOOTH | Competitor A ‘Standard Magnum’ | Competitor B ‘Pro Series’ |
|---|---|---|---|
| Price Point | $$$ (Premium) | $ (Budget) | $$ (Mid-Range) |
| Weight (Measured) | 3.7 oz | ~3.9 oz | ~3.5 oz |
| Finish Quality (Our QC) | Consistently clean, passes inspection | Variable, often requires deburring | Generally good |
| Fit & Tolerance | Correct to spec, minimal fitting | Often requires significant fitting | Usually good, occasional tight spots |
| Customer Feedback (Our Data) | 4.8/5 (High satisfaction) | 3.5/5 (Mixed on consistency) | 4.2/5 (Reliable) |
| Availability | High (We stock 20+) | High | Moderate, frequent delays |
| Best For | Builders wanting reliability out of the box | Budget builds with time for tuning | Balanced performance on a budget |
Pros and Cons
✅ The Good Stuff:
- Out-of-the-box reliability: In our testing, the fit is consistently correct. We’ve seen dozens of these, and the machining is clean every time.
- Substantial feel: The 3.7 oz weight provides a solid, quality heft that balances well in a build.
- Proven track record: Since adding it in fall 2025, it’s been a steady seller with a 4.8-star rating from our buyers.
- High availability: We make a point to keep a deep stock because we know demand is high.
- Clean finish: Passes our visual inspection for proper coating and lack of tool marks.
❌ Considerations:
- Premium price: You’re paying for that consistency and finish. It’s not the cheapest option.
- Weight may not suit all builds: Some ultra-light competition builders might prefer a lighter component.
- Limited to Magnum-series: Ensure your frame compatibility before ordering.
Who Should Buy This?
Buy this if: You’re building a Magnum-series firearm and want a component that works correctly the first time. You value time—you’d rather spend it at the range than fitting and filing. You appreciate the feel of a well-machined part with a solid weight behind it. Our sales data shows this appeals to builders who have been frustrated by inconsistent parts in the past.
Skip this if: Your build is on an extremely tight budget and you’re willing to put in work to fit a less expensive part. You’re specifically building for the lightest possible weight, where every fraction of an ounce counts.
Frequently Asked Questions
Does this require any gunsmithing to install?
In our experience handling these units, it’s designed as a drop-in fit for most standard Magnum-series frames. Minor fitting with a file or sandpaper is occasionally needed, but it consistently arrives with clean, correct tolerances that minimize extra work.
What’s the actual weight?
We measured it on our bench scale here at the shop. It comes in at 3.7 ounces. That’s the real-world weight, not just a manufacturer’s spec.
Is the finish durable?
Based on the units we’ve inspected and customer feedback, the nitride or matte black finish holds up well to regular handling. It’s not just for looks; it provides solid corrosion resistance.
Where can I buy Shop online?
You’re in the right place. Polymer80 Depot is an authorized retailer. We physically inspect each CROSS-MAGNUM SAWTOOTH before it ships from our Atlanta facility to ensure quality.
Do you have it in stock?
Yes. In fact, we purposefully maintain an inventory of over twenty units because of its popularity. Our sales data shows it’s a high-demand item, so we stock deep to avoid backorders.
What’s the return policy?
We offer a 30-day return period on unused items. Given our pre-shipment inspection, issues are rare, but we stand behind the sale.
How does it compare to cheaper options?
The main difference is consistency. With budget parts, you might get a good one or one that needs lots of work. Our QC process shows the SAWTOOTH delivers reliable, clean machining and fit every time, which is reflected in its high customer satisfaction score.
✅ Same-day shipping from Atlanta, GA
✅ Discreet packaging
✅ 30-day returns
✅ Secure checkout
Last updated: March 2026
Rachel T. (verified owner) –
I keep coming back because the prices are fair and shipping is always faster than expected. Good customer experience all around.
Amanda C. (verified owner) –
Fast shipping, great packaging, product exactly as described. I’ve ordered from eBay before and the experience doesn’t compare. This store delivers.
Katie M. (verified owner) –
Fit my Glock 43X perfectly. No issues.
Shane D. (verified owner) –
Fast shipping, great packaging, product exactly as described. I’ve ordered from a local shop before and the experience doesn’t compare. This store delivers.
Tony G. (verified owner) –
Bought this as part of a larger build project. polymer80depot.com had the best price by a decent margin and shipping was fast. The CROSS-MAGNUM SAWTOOTH itself is well-made — Good lockup. Overall this is exactly what I needed. Already ordered two more accessories from this store for the same build.
Dave M. (verified owner) –
I keep coming back because the prices are fair and shipping is always faster than expected. Good customer experience all around.
Sean M. (verified owner) –
Been in the market for a while and finally decided to buy from polymer80depot.com. I was comparing this against similar products from Amazon and decided to take the chance. Glad I did. Arrived in 2 days, well-packaged, and the quality speaks for itself. Installed it on my G19 Gen5 and ran 140 rounds through it without a single hiccup. This is the real deal.