The Heckler & Koch MP5 22 is a semi-automatic .22 LR pistol built on a metal receiver, styled to replicate the MP5's look and controls. The 9-inch barrel and 18.6-inch overall length put it in the same size class as the original, and at 5.95 lbs it handles similarly. The 25-round polymer magazine keeps range sessions going without constant reloads. 
 

Key Specifications 

• Caliber: .22 LR 
• Barrel Length: 9 inches 
• Overall Length: 18.6 inches 
• Capacity: 25+1 rounds 
• Weight: 5.95 lbs 
• Finish: Grey 
• Action: Semi-Auto 
• Sights: Diopter Drum Rear Sight with Adjustable Front 
• Safety: Ambidextrous 
• Magazine: 25-round Polymer Magazine 
• Trigger: Single Stage 
• UPC: 642230262355 
• Manufacturer Part Number: 81000602 
   

Features 

 
The diopter drum rear sight is the same style used on the centerfire MP5. It rotates to select between aperture sizes for different lighting and distance situations. The adjustable front sight allows precise zeroing. The ambidextrous safety operates the same way as the original MP5's, so left- and right-handed shooters use it the same way. The blowback action is straightforward and keeps the operating mechanics simple. 
 
The .22 LR chambering makes this a practical training option for shooters who want to practice MP5 manual of arms and sight picture at a fraction of the cost of centerfire ammunition. It's also a legitimate range gun on its own terms: quiet, low-recoil, and 25 rounds per magazine.

The HK MP5 22 generates consistent enthusiasm for its accuracy to the original platform and gets solid marks as a training and range gun.

Build quality is consistently praised. Owners who are familiar with the centerfire MP5 note that the controls, ergonomics, and overall feel translate well. The metal receiver gives it a more substantial feel than most .22 trainers, which many buyers consider worth the price premium.

The shooting experience (smooth cycling, low recoil, low ammunition cost) comes up often as the core reason people buy it. It's treated as a range staple rather than a one-time curiosity, with many owners reporting high round counts through it.

Reliability is mostly positive but not universal. Some owners report sensitivity to certain .22 LR brands, with bulk or lower-quality ammo generating occasional feeding issues. Most find a preferred brand and stick to it.

Pricing generates divided opinions. Some buyers feel the HK name and build quality justify the cost compared to cheaper .22 trainers. Others find it expensive for a rimfire gun when comparing raw feature-to-price. This is a consistent debate rather than a clear consensus.

Customization is discussed occasionally. The platform accepts some accessories, and users appreciate the flexibility to add optics or lights, though options are more limited than on a standard AR-pattern platform.