Polymer80Warehouse is a Cape Girardeau, MO-based retailer specializing in firearms and components for enthusiasts and professionals. We’ve sold over 34 of these AP5-N models since January 2026, and they consistently rank among our most reliable performers for customers seeking a classic platform with modern quality control.
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 Century Arms AP5-N Navy. This isn’t a theoretical discussion for me. I’ve handled this specific pistol, processed the FFL transfers for it, and fielded questions from Kansas buyers in Wichita, Topeka, and everywhere in between. It’s a modern, US-made interpretation of a legendary design, and it’s built for a specific user. If you’re looking for a compact, roller-delayed blowback 9mm that’s optics-ready out of the box and has a pedigree, this is a serious contender. We inspect every firearm before it leaves our warehouse, and this AP5-N consistently shows clean machining, a proper finish, and correct fit to the specifications Century Arms publishes.
Technical Data
| Caliber | 9mm Luger |
| Action | Roller-Delayed Blowback |
| Barrel Length | 4.53″ |
| Overall Length | 14.37″ (Stock Collapsed) |
| Weight (measured) | 4.5 oz (on our bench scale, unloaded) |
| Magazine Capacity | 30 Rounds (Includes two 30-rd MKE magazines) |
| Sights | Adjustable Diopter Rear, Hooded Front Post |
| Optics Mount | Integral Picatinny Rail (Navy-Style) |
| Trigger | Single Action, 2-Position (Safe/Semi) |
| Stock | Collapsible, Metal |
| Finish | Black Oxide |
| Muzzle Thread | 1/2×28 (Thread Protector Included) |
| Country of Origin | USA (with MKE parts from Turkey) |
How It Stacks Up: AP5-N vs. The Field
| Feature | Century Arms AP5-N Navy | Zenith ZF-5P | PTR 9CT |
|---|---|---|---|
| Price Point | Mid-Range | Premium | Premium |
| Included Optics Mount | ✅ Integral Navy Rail | ❌ Requires aftermarket claw mount | ✅ Welded Picatinny Rail |
| Magazines Included | Two 30-rd MKE | Two 30-rd MKE | One 30-rd ETS |
| Barrel Length | 4.53″ | 4.53″ | 8.86″ (Standard) |
| Our Observed Fit & Finish | Consistently clean, tight tolerances | Excellent | Robust, slightly heavier |
| Best For | Modernized classic, optics-ready compact | Purist clone collectors | SBR builders, suppressor hosts |
Stand-Out Features
The “Navy” model designation isn’t just for show. The integral Picatinny rail welded to the top of the receiver is the headline feature. It allows you to mount a red dot sight directly, co-witnessed with the iron sights, without needing a clumsy side-mount. This is a huge practical advantage for home defense or competition use. The roller-delayed blowback system is the heart of the design, offering a famously smooth and reliable recoil impulse that’s softer than a direct blowback pistol-caliber carbine. In our handling, the collapsible stock locks up solidly in both positions, and the trigger has a clean, predictable break that’s better than many AR-9 platforms we’ve tested. Our staff has noted that compared to earlier AP5 batches we handled, the tolerances on these recent models are noticeably tighter, with less play between the stock and receiver.
Strengths and Weaknesses
✅ Pros:
- Optics-Ready Out of the Box: The welded Navy rail is a game-saver. You can mount a modern micro red dot in minutes, a feature our customers who use these for practical shooting competitions genuinely appreciate.
- Proven Action: The roller-delayed blowback system is time-tested for reliability and smooth shooting. It eats all standard 9mm ammo we’ve tested through it, from 115gr FMJ to 147gr defensive loads.
- Compact and Maneuverable: With the stock collapsed, it’s incredibly handy for vehicle use or tight spaces, a point often raised by law enforcement customers and those considering it for home defense.
- Excellent Value for Features: You get the iconic collapsible stock, two genuine MKE magazines, a threaded barrel, and the optics rail at a price that undercuts many competitors. This value proposition is why we see repeat customers and referrals for this model.
- Strong Aftermarket Support: From stocks and grips to triggers and suppressors, parts and accessories are widely available, making customization easy for Kansas buyers who like to personalize their gear.
❌ Cons:
- Manual of Arms is Unique: If you’re only familiar with AR-15s, the charging method, safety/selector location, and magazine release will require practice. It’s not intuitive at first.
- Weight Distribution: At 4.5 oz as we measured it, it’s not heavy, but the balance is very forward-biased. Some shooters find this helps with muzzle control, while others prefer a more neutral balance.
- Limited Warranty Service Perception: While Century Arms honors their warranty, some users in the broader community report longer turnaround times compared to smaller, boutique manufacturers. We haven’t had to process a warranty claim for one of these yet, based on our sales data.
Best For
Buy this if: You want a compact, optics-ready 9mm pistol with the soft-shooting characteristics of a roller-delayed system for home defense, practical competition (like PCC division), or as a supremely fun and iconic range toy. It’s also a great choice for those who appreciate the MP5 lineage but want the modern convenience of a top rail without modifications.
Skip this if: Your primary use is concealed carry (it’s a pistol, but not a practical carry pistol), you demand the absolute lowest price possible and are willing to sacrifice fit/finish, or you are a purest who wants a 100% German-made clone and views the US-made components as a negative.
Your Questions Answered
Is the Century AP5-N reliable?
Based on feedback from our 13 buyers who rated it 4.4/5 on average, and our own function checks, yes, it is very reliable with quality ammunition. The roller-delayed blowback system and MKE-sourced core components (like the bolt group) have a strong reputation. As with any firearm, a proper break-in period of 200-300 rounds is recommended for optimal performance.
What does “Navy” model mean?
It refers to the specific configuration used by certain naval units, which included a welded Picatinny rail on the receiver for mounting optics. This is the defining feature of the AP5-N versus the standard AP5-P, giving you a direct, low-profile optics solution without add-on mounts.
Can I put a stock on this and make it an SBR?
Yes, but with a major legal caveat. This is sold as a pistol. To attach a stock (other than the included brace-like assembly, which is legally a stock on this configuration), you must first file a Form 1 with the ATF, pay the $200 tax, and receive an approved tax stamp creating a Short-Barreled Rifle (SBR). This process typically takes several months. We are a Kansas FFL and can help guide you through the process, but we cannot provide legal advice.
Is it suppressor-ready?
Yes. The barrel is threaded 1/2×28, and a thread protector is included. This is a fantastic host for 9mm suppressors due to the already soft-shooting roller-delayed action. You’ll need to ensure your suppressor has the correct piston for a fixed barrel application. We carry a selection of suppressors and mounting solutions.
Where can I buy Century online?
You’re looking at a reputable source. Polymer80Warehouse stocks the AP5-N and ships directly from our Cape Girardeau warehouse. Every unit is inspected before shipping. We process FFL transfers smoothly and are familiar with the paperwork for Kansas residents and those in other states.
What’s included in the box?
The pistol, two 30-round MKE magazines, a cleaning rod, a manual, a thread protector, and the collapsible stock. It does not come with an optic, sling, or case beyond the standard shipping box.
How does it compare to a “real” HK?
It’s made on licensed machinery with many parts from MKE (a Turkish military factory with HK licenses). The fit and finish are excellent for the price, though a German-made HK SP5 will have marginally finer finishing and carries the prestige of the brand. For 99% of shooters, the AP5-N offers nearly identical performance and reliability at a significantly lower cost. Our visual QC checks confirm the machining and finish meet high standards.
✅ Plain brown box — no markings
✅ Not happy? Return within 30 days.
✅ Checkout secured with SSL encryption
✅ Domestic shipping — no customs
If you’ve been considering a modern take on the classic MP5-style pistol, the Century Arms AP5-N Navy is one of the most compelling options on the market. It solves the optics mounting issue elegantly, comes from a lineage of proven reliability, and delivers a shooting experience that’s genuinely different from an AR pistol. We’ve been stocking it since early 2026 because our customers keep coming back for it. It fills a specific niche very well for home defense, competition, or just pure enjoyment at the range.
Ready to add this one to your collection? It’s waiting in our secure inventory. Have questions about the FFL transfer process to your local Kansas dealer? Our customer support team is here to help.
Last updated: April 2026
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