Century Arms AP5 9MM 301 SBT5 Folding Brace Black
Pros & cons
What works
- Roller-delayed blowback action for smooth, controllable cycling
- Cold hammer forged barrel for accuracy and longevity
- SBT5K folding brace for compact storage
- MSRP confirmed directly by the manufacturer
Trade-offs
- 30-round magazine and pistol features may trigger California assault weapons rules
- Heavier than a typical polymer AR pistol at roughly 5.5 lbs
Specs at a glance
About this product
The Century Arms AP5 is a semi-automatic pistol built on the MKE-manufactured platform based on the Heckler & Koch MP5 design, giving civilian shooters access to the MP5's roller-delayed blowback system and overall ergonomics in a pistol configuration. This listing is the black, threaded 8.9-inch barrel version equipped with an SBT5K folding brace.
What makes the AP5 different from a standard AR-pattern pistol?
Unlike the direct-impingement or piston systems found in AR-pattern rifles and pistols, the AP5 uses a roller-delayed blowback action, the same fundamental operating system found in the original HK MP5 submachine gun and its semi-automatic civilian variants. That system is known for exceptionally smooth cycling and controllable recoil, largely because the delayed blowback design manages bolt velocity differently than a direct-blowback or gas-operated action. The AP5 is built on a cold hammer forged barrel, a manufacturing process that improves barrel longevity and accuracy consistency over a button-rifled barrel.
What are the full specs of this configuration?
This AP5 runs an 8.9-inch threaded barrel at the standard 1/2x28 thread pitch with a 1:9.8-inch twist rate, a 30+1 magazine capacity, and an SBT5K side-folding brace for a more compact stored length when not shouldered. The pistol is built on a polymer lower with a matte black finish and weighs approximately 5.5 pounds, with a two-position thumb safety for straightforward manual-of-arms operation. Century Arms confirms this pistol's MSRP directly on its own manufacturer site, giving buyers a reliable reference point against third-party listings.
Who is the AP5 built for?
This pistol appeals strongly to HK MP5 enthusiasts who want the roller-delayed blowback shooting experience and manual of arms at a substantially lower price point than an original HK-manufactured MP5-pattern firearm, along with shooters who simply want a distinctive, smooth-shooting 9mm pistol platform that stands apart from the AR-pattern crowd. The folding brace adds practical storage and transport convenience, letting the pistol fold down to a shorter overall length when not in use.
Because this is a firearm, it cannot ship to your home address. It transfers to a licensed FFL dealer near you, where you will complete a background check and the required paperwork in person before taking possession. California maintains its own assault weapons law with features-based restrictions, along with a 10-round magazine capacity limit, both of which can apply to a braced, threaded pistol like the AP5 depending on its exact configuration; buyers should confirm current California compliance with their FFL before ordering.
The MP5-pattern platform the AP5 is based on has a long service history with military and law enforcement units worldwide, largely due to its reputation for controllability in full-auto submachine gun form and reliability across harsh conditions — a reputation the semi-automatic AP5 carries over in spirit, even though it fires only semi-automatically like any other commercially available pistol. Aftermarket support for MP5-pattern accessories, including optic mounts, slings, and replacement furniture, has grown substantially as more shooters have adopted this style of pistol, making it easier than ever to build out a complete setup around the AP5.
Because the AP5 shares its basic manual of arms with the broader MP5-pattern family, shooters who eventually want to add a top rail for an optic, swap the handguard, or add a sling mount will generally find compatible parts without needing anything custom-fitted, which is a real advantage over less common or truly proprietary pistol platforms on the market today.
FFL transfer required
This item is a firearm and ships only to a licensed FFL dealer, never to a home address. At checkout, enter your preferred dealer as the shipping address, or leave it blank and we will assign a licensed dealer near you at no extra cost. You complete the background check and paperwork with the dealer when you pick up.
California buyers: handguns must be on the California roster for delivery to a California FFL, a Firearm Safety Certificate (FSC) and DROS are handled at the dealer, and the 10-day waiting period applies. Out-of-state buyers receive the firearm through their own local FFL under their state's rules.
Key attributes
| Transfer | Ships to your FFL dealer |
| Caliber | 9mm |
| Capacity | 30+1 |
| Barrel Length | 8.9 in (Threaded) |
| Action | Roller-Delayed Blowback |
| Finish | Matte Black |
Frequently asked questions
- What action does the AP5 use?
- A roller-delayed blowback system, the same fundamental design used in the original HK MP5.
- What's the barrel length on this listing?
- 8.9 inches, threaded at 1/2x28.
- What's the magazine capacity?
- 30+1 rounds.
- Does it come with a brace?
- Yes, an SBT5K side-folding brace is included on this configuration.
- Is this pistol California compliant?
- Compliance depends on the exact configuration under California's assault weapons and magazine capacity rules. Confirm with your FFL before ordering.