The Kahr Arms P45 is a .45 ACP semi-automatic pistol in a compact package. At 6.07 inches overall, 3.4-inch barrel, and 18.5 oz, it's one of the smaller .45 ACP pistols in production. The DAO trigger, TruGlo night sights, stainless steel slide with matte black finish, and black polymer frame make it purpose-built for concealed carry. 
 

Key Specifications 

• Brand: Kahr Arms 
• Model: P45 
• Caliber: .45 ACP 
• Capacity: 6+1 rounds 
• Action Type: Double Action Only (DAO) 
• Barrel Length: 3.4 inches 
• Overall Length: 6.07 inches 
• Weight: 18.5 ounces (1.2 lbs) 
• Frame Material: Polymer 
• Frame Finish: Black 
• Slide Material: Stainless Steel (Matte Black Finish) 
• Sights: TruGlo Night Sights 
   

Detailed Features 

The DAO trigger fires with the same pull weight on every shot -- no external hammer, no secondary safety to engage. The mechanism is self-cocking and consistent, which is appropriate for a carry pistol where a predictable trigger matters. 
 
TruGlo night sights are factory-installed. They work in low-light conditions and replace the need for an aftermarket upgrade that's common on similar compact pistols. 
 
The polygonal rifled barrel contributes to accuracy and extends barrel life compared to conventional button rifling. The textured polymer grip holds well but the short grip panel limits full-hand purchase at 18.5 oz. 
 
At 6.07 inches, the P45 is compact enough for IWB carry. The .45 ACP cartridge at these dimensions produces more felt recoil than larger-frame .45s -- manageable but noticeable, especially with +P loads. 
 

Target Audience 

Concealed carry users who specifically want .45 ACP in the smallest practical semi-auto format. The DAO trigger and night sights make it a complete carry package without aftermarket work. 
 

Usage Scenarios 

• Concealed Carry: The compact dimensions and night sights make it a practical daily carry option. 
• Home Defense: The DAO trigger and .45 ACP stopping power work in this role. 
• Range Use: The P45 functions reliably at the range, though the short grip and .45 ACP recoil make extended sessions more demanding than a full-size gun.

The Kahr P45 with NightSights draws a consistent user base among carry-focused shooters who specifically want .45 ACP in a compact DAO package.

The small size is the primary appeal and the most-cited characteristic. Users who carry daily appreciate that the P45 is genuinely concealable in configurations where most .45 ACP pistols print or become impractical. The stainless slide and polymer frame keep weight manageable.

The TruGlo night sights are mentioned positively as a factory inclusion -- buyers note they don't need to spend on aftermarket sights after purchase.

The DAO trigger gets two camps of feedback. Shooters who train with DAO systems find it consistent and appropriate for carry. Others find the pull heavier than expected when comparing it to striker-fired alternatives. This is a platform characteristic, not a defect.

The grip size comes up as a practical limitation for larger hands -- the short panel means two to three fingers are active on the grip, which affects recoil management. Combined with .45 ACP's natural snap in a light pistol, this requires deliberate technique.

Some early-production reliability issues are mentioned -- feeding and ejection inconsistencies during break-in. Most users report these resolve after a few hundred rounds. A minority experienced persistent issues and reported mixed results with Kahr customer service.