The Kriss Vector SDP Gen 3 in .45 ACP is a purpose-built defensive carbine that combines the stopping power of a full-size pistol round with the handling and control of a compact long gun. At just 5.6 lbs and collapsing to 15.35 inches, the SDP occupies the sweet spot between portability and shootability — ideal for home defense, vehicle storage, or close-quarters work where you need serious power without the bulk of a traditional rifle. If you've built an AR platform or run Glock mags, the Vector SDP's familiar controls and mag compatibility mean minimal learning curve.

The Gen 3 redesign focuses on modularity and user customization. The interchangeable AR15/M16-pattern pistol grip lets you fine-tune ergonomics to your hand, while the ambidextrous mag release and short-throw safety work equally well for lefties and righties. The skeletonized trigger has a short 0.7mm pre-travel, promoting clean, predictable breaks during defensive drills. Full-length Picatinny rails on top and a rear stock-mount rail mean you can mount optics, lights, and braces without compromise — build it the way your mission demands.

The Vector SDP runs on a closed-bolt delayed blowback system, feeding from standard full-size Glock magazines (one 30-round mag included). Its 5.5-inch 4140 chrome-moly barrel wears a durable black nitride finish and is threaded .578x28 RH for suppressor mounting. Field-stripping is refreshingly simple: the 4-pin tool-less disassembly gets you down to major components in seconds. Whether you're setting up a dedicated .45 ACP defensive platform or adding a compact, intuitive option to your safe, the Vector SDP Gen 3 rewards users who value control, modularity, and genuine stopping power in a surprisingly compact package.

Key Features

• Lightweight form factor at 5.6 lbs; collapses to 15.35 inches for compact storage and deployment
• Closed-bolt delayed blowback operating system optimized for .45 ACP ballistics
• Interchangeable AR15/M16 pistol grip and ambidextrous controls for left- and right-handed shooters
• Full-size Glock magazine compatibility (1×30-round mag included) — no adapter needed
• Skeletonized trigger with minimal pre-travel for crisp, controllable breaks
• Full-length top Picatinny rail and rear stock-mount rail for optics, lights, and accessories
• 4140 chrome-moly barrel with black nitride finish; threaded .578×28 RH for suppressors
• Tool-less 4-pin disassembly for field maintenance and cleaning

Specifications

Caliber	.45 ACP
Action	Semi-Automatic
Operating System	Closed Bolt Delayed Blowback
Barrel Length	5.5 inches (139.7 mm)
Overall Length (Collapsed)	15.35 inches (390 mm)
Weight	5.6 lbs (2.5 kg)
Barrel Material	4140 Chrome Moly
Barrel Finish	Black Nitride (QPQ)
Barrel Threading	.578×28 RH
Trigger Type	Pivoting Single Stage; 0.7 mm Pre-Travel
Magazine(s)	1×30-Round (Full-Size Glock Compatible)
Color	Black
Model	Vector SDP Gen 3

Frequently Asked Questions

Will the Kriss Vector SDP accept standard Glock magazines?

Yes. The SDP is fed with full-size Glock-pattern magazines, so if you already run Glock mags in your other firearms, you can use the same ammunition source here. One 30-round magazine is included with the carbine.

Can I mount a suppressor on the Vector SDP?

Yes. The barrel is threaded .578×28 RH, so you can attach a .45 ACP suppressor with the appropriate adapter or direct-thread mount.

Is the pistol grip replaceable, and will AR15 grips fit?

The Vector SDP features an interchangeable AR15/M16-pattern pistol grip, so standard AR-platform grips will work. This lets you swap grips to match your hand size or ergonomic preference.

What's included in the box?

The Kriss Vector SDP Gen 3 comes with one 30-round magazine. You'll need to source a brace, stock, or other accessories separately to complete your build.