H&K MP5A4 RIS Full Metal AEG Airsoft Rifle with Eshooter ETU GEN-2 in Black (CM041B)

H&K MP5A4 RIS Full Metal AEG Airsoft Rifle with Eshooter ETU GEN-2 in Black (CM041B)

The H&K MP5A4 RIS Full Metal AEG Airsoft Rifle with Eshooter ETU GEN-2 in Black (CM041B) takes one of the most recognisable submachine gun designs ever produced and gives it a thoroughly modern airsoft upgrade. Manufactured by Cyma under official Umarex and Heckler & Koch licence, this electric airsoft gun combines the traditional fixed-stock MP5A4 layout with a sturdy aluminium RIS handguard and an advanced Eshooter ETU Gen-2 electronic trigger system. It's a cracking combination for players who appreciate the unmistakable MP5 silhouette but want modern trigger performance and practical accessory mounting options. The metal upper receiver, authentic H&K trademarks and classic MP5 controls keep the original character intact, while the reinforced gearbox and programmable electronics bring the internal workings firmly up to date. If you've always liked the look of a traditional MP5 but fancied something a little more versatile for skirmishing, the Cyma CM041B deserves a closer look.

Starting at the business end, the CM041B features the classic MP5 three-lug muzzle arrangement, giving the airsoft rifle its familiar tactical appearance. Underneath the muzzle assembly sits a standard 14mm counter-clockwise (CCW) threaded barrel, allowing compatible tracer units, mock suppressors and other suitable airsoft muzzle accessories to be fitted. That's particularly handy for indoor CQB players who enjoy running illuminated tracer BBs during low-light games. There's something rather satisfying about watching a stream of glowing BBs travel towards a target, especially when you're playing in a darkened building. The traditional three-lug design also means the rifle retains its authentic MP5 appearance when you're not running additional muzzle accessories. It's a practical arrangement that gives you plenty of options without compromising the original styling.

Moving backwards, you'll find one of the CM041B's most useful external upgrades: the aluminium tri-rail RIS handguard. Replacing the traditional smooth MP5 foregrip with three sections of 20mm Picatinny accessory rail, this arrangement gives you plenty of room to personalise your setup. Tactical torches, vertical foregrips and compatible aiming accessories can be mounted directly onto the rails without needing additional adapters. The aluminium construction provides a sturdy mounting platform, while the familiar Picatinny system makes changing accessories straightforward. Compared with newer M-LOK handguards, the RIS arrangement has a slightly chunkier feel, but that's not necessarily a bad thing. It suits the classic MP5 profile nicely and gives the front end a purposeful tactical appearance. For CQB airsoft games, a compact torch and comfortable foregrip can make this already practical submachine gun even more enjoyable to handle.

The main receiver and cocking tube assembly are made from metal alloy, giving the H&K MP5A4 CM041B the reassuring weight and solidity you'd expect from a full-metal airsoft replica. The lower receiver and pistol grip frame use durable polymer, maintaining the familiar mixture of materials associated with the original MP5 platform. There's no unnecessary metal added purely for appearances; the construction follows the traditional design while keeping the grip comfortable in the hands. Official Heckler & Koch trademarks provide the finishing touch, giving the rifle a much more convincing appearance than an unlicensed MP5-style BB gun. The familiar charging handle sits along the cocking tube, completing that classic MP5 look. And yes, it's difficult to resist giving an MP5 charging handle a little attention when you first pick one up. Some designs simply have that sort of character.

At the rear, the CM041B features the traditional fixed A4-style shoulder stock, which is one of the main reasons players choose this version over the retractable-stock MP5A5. The solid stock provides a consistent shoulder position, making it easier to maintain a comfortable shooting stance and keep the sights aligned during repeated engagements. It's particularly welcome during longer airsoft games, where a stable rifle can feel considerably more comfortable than constantly adjusting a sliding stock. Another major advantage is the generous internal battery compartment. Compared with the limited space available in many compact airsoft submachine guns, the fixed stock provides more room for a suitable AEG battery. That makes battery installation less of a wrestling match before a skirmish. The stock does increase the rifle's overall length compared with collapsible MP5 variants, but the improved stability and practical battery storage are worthwhile benefits for many players.

Inside the CM041B is where things get particularly interesting. Cyma has fitted this MP5A4 with a factory-installed Eshooter ETU Gen-2 electronic trigger unit, replacing the conventional mechanical trigger contact system found in older Airsoft AEG designs. Instead of relying on traditional electrical contacts to operate the motor, the ETU uses electronic control to manage firing and monitor gearbox cycling. The system includes complete cycle detection, helping the gearbox finish its firing sequence consistently. In practical terms, this can provide a noticeably sharper trigger response, particularly during repeated semi-automatic shooting. Anyone who's spent a full day playing semi-auto-only CQB will appreciate how important a responsive trigger can be. You want the gearbox to react cleanly when you pull the trigger, without that sluggish feeling sometimes associated with older mechanical-switch AEGs. It's a meaningful improvement that makes the classic MP5 platform feel much more contemporary.

The Eshooter ETU Gen-2 also introduces programmable firing modes, including supported three-round burst configurations, giving players additional control over how their airsoft rifle operates. Electronic pre-cocking is another welcome feature, allowing the gearbox mechanism to be positioned in preparation for the next shot. This can reduce the delay between pulling the trigger and firing, making semi-automatic operation feel more immediate. Active braking helps control motor over-spin by bringing the motor to a controlled stop after cycling, while low-voltage protection is designed to help prevent compatible LiPo batteries from being drained excessively. These electronic features are particularly useful for players who enjoy fine-tuning their airsoft setup. Of course, it's important to follow the ETU manufacturer's programming instructions and ensure your chosen battery is compatible. Get everything configured properly, though, and the CM041B offers a level of electronic control that traditional MP5 AEGs simply didn't have.

Supporting those electronics is Cyma's reinforced Version 2 gearbox, fitted with steel gears, metal bushings and a high-torque motor. This combination provides a solid mechanical foundation for regular airsoft skirmishing, with the reinforced gearbox shell housing the familiar components found in many established AEG platforms. The steel gears are designed to withstand repeated cycling, while the metal bushings support the rotating gear shafts and help maintain consistent operation. Meanwhile, the high-torque motor supplies the turning force needed to cycle the gearbox, working alongside the electronic trigger unit to provide responsive firing behaviour. It's a sensible internal specification for an airsoft submachine gun intended for everything from indoor CQB to general woodland skirmishes. The Version 2 gearbox layout will also be familiar to experienced airsoft technicians, making routine servicing and compatible internal maintenance relatively straightforward.

Magazine compatibility is refreshingly uncomplicated, with the H&K MP5A4 CM041B accepting compatible Tokyo Marui-spec MP5 AEG magazines. That includes traditional curved mid-cap magazines, high-capacity winding magazines and compatible straight-stick designs. If you've already got an MP5 airsoft gun in your collection, there's a good chance you'll have suitable magazines ready to use, although individual magazine fitment and feeding should always be checked. Mid-cap magazines are particularly popular among players who prefer quieter movement without loose BBs rattling around inside a high-cap reservoir, while high-cap magazines provide additional ammunition capacity for longer games. Combined with the fixed stock, aluminium RIS handguard and responsive electronic trigger, the CM041B makes a very capable all-round airsoft rifle. It retains the compact receiver and familiar handling of the MP5 platform while offering enough flexibility for different playing styles and equipment setups.

Overall, the Cyma H&K MP5A4 RIS CM041B is an excellent option for airsoft enthusiasts who want the familiar fixed-stock MP5 experience with the benefits of modern AEG technology. The officially licensed metal receiver, authentic H&K markings and traditional three-lug muzzle give it the appearance MP5 fans know and love, while the aluminium Picatinny handguard opens up plenty of practical accessory options. Add the reinforced Version 2 gearbox, high-torque motor and programmable Eshooter ETU Gen-2, and you've got a classic-looking airsoft submachine gun with some genuinely useful improvements under the bonnet. The fixed stock makes it particularly appealing to players who value shoulder stability and convenient battery storage over the shortest possible overall length. For CQB skirmishes, tactical loadouts and general airsoft gameplay, this is a satisfying blend of old-school MP5 character and modern electronic performance. Classic looks, clever internals and plenty of room to make it your own.

Highlights

• Officially licensed H&K MP5A4 airsoft rifle manufactured by Cyma under Umarex licence
• Authentic Heckler & Koch trademarks for a realistic MP5A4 appearance
• Full-metal-style construction with sturdy metal alloy upper receiver and cocking tube
• Factory-installed Eshooter ETU Gen-2 electronic trigger system
• Complete gearbox cycle detection for consistent electronic firing control
• Programmable firing modes, including supported three-round burst configurations
• Electronic pre-cocking function for improved semi-automatic trigger response
• Active braking helps reduce motor over-spin and control gearbox cycling
• Low-voltage protection helps prevent excessive draining of compatible LiPo batteries
• Reinforced Version 2 gearbox designed for dependable AEG operation
• Durable steel gears and metal gearbox bushings
• High-torque motor for responsive gearbox cycling
• Aluminium tri-rail RIS handguard with 20mm Picatinny accessory mounting rails
• Compatible with tactical lights, vertical foregrips and suitable Picatinny accessories
• Classic MP5 three-lug muzzle arrangement
• Standard 14mm CCW barrel threading beneath the muzzle assembly
• Compatible with suitable airsoft tracer units and mock suppressors
• Fixed A4-style shoulder stock provides a stable shooting position
• Spacious internal stock compartment for a compatible AEG battery
• Durable polymer lower receiver and pistol grip frame
• Compatible with Tokyo Marui-spec MP5 AEG mid-cap, high-cap and straight-stick magazines
• Traditional black MP5 styling with modern tactical RIS furniture
• Great for CQB airsoft games, indoor skirmishes and general woodland gameplay

What's Included

• 1 x H&K MP5A4 RIS Full Metal AEG Airsoft Rifle with Eshooter ETU GEN-2 in Black (CM041B)
• Factory-installed Eshooter ETU Gen-2 electronic trigger system
• Fitted aluminium tri-rail RIS handguard
• Fitted fixed A4-style stock with internal battery compartment

Technical Specifications

• Manufacturer: Cyma
• Official Licence: Umarex / Heckler & Koch
• Model: CM041B
• Platform: H&K MP5A4 RIS
• Airsoft Gun Type: Electric Airsoft Rifle / Airsoft Submachine Gun
• Power System: Electric AEG
• Gearbox Version: Reinforced Version 2
• Electronic Trigger Unit: Eshooter ETU Gen-2
• Trigger Control: Electronic
• Gearbox Cycle Detection: Complete Cycle Detection
• Programmable Firing Modes: Yes
• Burst Function: Supported 3-Round Burst Configuration
• Pre-Cocking: Electronic Pre-Cocking Function
• Active Braking: Yes
• Battery Protection: Low-Voltage Protection for Compatible LiPo Batteries
• Gear Set: Steel Gears
• Gearbox Bushings: Metal
• Motor: High-Torque Motor
• Upper Receiver Material: Metal Alloy
• Cocking Tube Material: Metal
• Lower Receiver Material: Durable Polymer
• Pistol Grip Frame: Durable Polymer
• Handguard Material: Aluminium
• Handguard Type: Tri-Rail RIS
• Accessory Rail System: 20mm Picatinny
• Stock Type: Fixed A4-Style Shoulder Stock
• Battery Compartment: Internal Fixed Stock Compartment
• Muzzle Device: Classic MP5 3-Lug Flash Hider
• Muzzle Thread: 14mm Counter-Clockwise (CCW) Beneath Muzzle Assembly
• Magazine Type: MP5 AEG Magazine
• Magazine Compatibility: Tokyo Marui-Spec MP5 AEG Magazines
• Compatible Magazine Styles: Mid-Cap, High-Cap and Straight-Stick Magazines
• External Markings: Official H&K Trademarks
• Colour: Black
• Recommended Use: CQB, Indoor Skirmishes and General Airsoft Gameplay