The HK416 by Heckler & Koch is a semi-automatic pistol chambered in .22 LR with an 8.5-inch barrel. It's built to mirror the handling characteristics of the centerfire HK416 rifle, making it a practical training option. Weight is 4.50 lbs and overall length is 16.7 inches. 
 

Key Specifications 

• Brand: Heckler & Koch 
• Model: HK416 
• Caliber: .22 LR 
• Action: Semi-Auto 
• Barrel Length: 8.5 inches 
• Weight: 4.50 lbs 
• Length: 16.7 inches 
• Capacity: 10+1 rounds 
• Sights: Flip Up Front & Rear 
• Grip Material: Black Polymer (Flat Dark Earth finish) 
• Receiver Material: Aluminum 
• Safety Type: Manual Thumb Safety 
• Thread Pattern: 1/2"-28 tpi 
   

Detailed Features 

 
The aluminum receivers keep weight reasonable for a .22 pistol. The RIS rail system follows M-LOK/Mil-standard 1913 specs, so standard accessories mount without adapters. Flip-up front and rear sights are included and co-witness with most optics. 
 
The pistol grip has built-in storage — small but useful for a cleaning kit or spare batteries. Last-round bolt hold open makes reloads faster and lets you confirm the chamber is clear. The threaded muzzle at 1/2x28 accepts standard suppressors or muzzle devices. 
 
The manual thumb safety sits at an accessible angle for quick engagement and release.

The HK416 .22 LR pistol gets consistent praise for how well it replicates the feel of the centerfire HK416. Shooters who own both note that the ergonomics and controls transfer directly, which makes it a genuine practice tool rather than just a novelty.

The .22 LR chambering is the core appeal for training use — cheap ammunition and minimal recoil mean you can run many more rounds per session without fatigue or cost becoming limiting factors. Accuracy reports at typical pistol distances are generally favorable.

Build quality is well-regarded. The aluminum receiver feels solid and the FDE finish is consistent across the frame.

Reliability gets more mixed feedback. Several owners mention sensitivity to ammunition — bulk .22 LR can produce more feeding issues than premium ammo. Using quality high-velocity ammunition tends to resolve most of these complaints, but it does narrow the cost advantage somewhat.

The FDE finish draws divided opinions. Some owners like the aesthetics; others treat it as purely cosmetic with no preference either way.

At its price point, the HK416 .22 costs more than generic .22 pistols, but owners who value the HK manual of arms for training generally consider it worthwhile.