The Grand Power P40L is a full-size 10mm pistol with a rotary locking barrel, a less common mechanism that Grand Power uses across their lineup. The 5" barrel, 8.9" overall length, and 14-round capacity put it in the same size category as the Glock 20 but with a different operating system. Weight is 34.7 oz. unloaded. 
 

Key Specifications 

• Manufacturer: Grand Power 
• Model: P40L 
• Caliber: 10mm 
• Barrel Length: 5 inches 
• Capacity: 14 rounds 
• Weight: 34.7 oz (2.2 lbs) 
• Action Type: Single/Double 
• Frame Material: Black Polyamide with CNC Machined Steel 
• Grip Material: Textured Polyamide 
• Safety Features: Thumb safety 
• Sights: Front - Dovetail; Rear - Drift Adjustable 
• Total Length: 8.9 inches 
   

Detailed Features 

The rotary locking barrel reduces felt recoil compared to a standard Browning tilt-barrel design by keeping the barrel in line with the bore during the locking and unlocking cycle. In 10mm, where recoil management matters, that's a meaningful engineering choice. The Tenifer QPQ finish on the slide and barrel provides corrosion resistance. 
 
The DA/SA trigger fires double-action first from a decocked hammer, then single-action for subsequent shots. An exposed hammer and thumb safety are standard. The dovetail front sight and drift-adjustable rear allow some sight customization without the cost of a fully adjustable system. 
 
The textured polyamide frame and grip work adequately in wet conditions. 14 rounds of 10mm is a strong capacity for the caliber. Most full-size 10mm pistols run 15 or fewer. Grand Power is a Slovak manufacturer with limited distribution in the US, which affects parts and accessory availability.

The P40L draws interest specifically from 10mm enthusiasts, and within that group the reception is largely positive. The rotary barrel design and its impact on recoil management come up frequently. Owners who've shot other 10mm pistols notice the difference and consider it a genuine advantage. Accuracy at range gets consistent positive marks, aided by the 5" barrel and stable lockup.

The 14-round capacity in 10mm is a practical draw for hunters and people who carry in bear country, where both round count and caliber matter. Build quality is described as solid, with good fit and finish for a brand that isn't widely distributed in the US.

The recurring criticisms follow a pattern: the P40L is heavier than some competitors, which some owners find tiring in extended carry. Trigger opinions split. Some find the DA/SA system smooth, others want a lighter or crisper pull. Parts and accessories are harder to source than for Glock or Sig options, which is the main practical objection. Price is viewed as fair by most owners but is occasionally flagged as high relative to better-known brands with more aftermarket support.