The KAK K15 is an AR-style 9mm carbine sold as a complete rifle with a 16-inch barrel and a 32+1 capacity. It pairs a 6061 T6 upper with an M-LOK handguard and a one-piece bolt carrier group finished in black nitride, on a CNC-machined billet AR15 lower built to military-dimension fit. The lower is machined from aircraft-grade aluminum with an M4/M16-spec fire control pocket and hard coat anodizing, and the rifle uses an external manual safety with standard AR-pattern controls. 
 

Key Specifications 

• Brand: KAK 
• Model: K15 
• Caliber: 9mm 
• Barrel Length: 16 in 
• Capacity: 32+1 rounds 
• Color: Black 
• Upper: 6061 T6 Aluminum 
• Lower: Billet AR15, CNC Machined, Aircraft-Grade Aluminum 
   

Detailed Features 

• M-LOK handguard with a heavy-duty barrel nut for mounting accessories 
• One-piece BCG in black nitride finish for smooth cycling and corrosion resistance 
• Billet AR15 lower is hard coat anodized and machined for an M4/M16-spec fire control pocket 
• External manual safety uses standard AR-pattern controls 
• Complete build is ready to accept common AR-pattern sights and optics

Owners of the K15 generally like the fit and finish of the billet lower, and the black nitride BCG gets called out for running smooth with minimal cleaning between range trips. A minority report needing to tune the buffer setup to get the 9mm carbine cycling reliably right out of the box, which is a known step on blowback 9mm ARs in general.

As a range gun, the K15's light recoil and carbine-length handling make it approachable for newer shooters and fast on follow-up shots. The M-LOK handguard makes it simple to add a light or grip, and the overall balance is described as neutral rather than muzzle-heavy.

On value, buyers point to getting a complete 9mm AR-style build, upper and lower already assembled, at a lower cost than piecing one together. The AR-pattern lower means the aftermarket for grips, stocks, and triggers is large, though 9mm-specific parts like magwells are a smaller pool than 5.56 AR parts.