The bolt head carrier design ensures maximum user safety in case of faulty ammunition and prevents incorrect cocking of the weapon.

A safe and practical option is to lock the bolt in any position of its track. Simply lift up the cocking lever and clamp it firmly against the receiver. Activating the bolt lock prevents any accidental firing.

The carrying grip also performs as the barrel change grip. When it is folded down, the barrel is locked. To change the barrel, simply fold up the grip and unlock the barrel.

The upwards protruding loading indicator is very practical. It not only indicates optically that there is a cartridge in the feed tray, but it also allows you to feel the loading status in the dark.

Heckler & Koch set the standard for durability of barrels. At the same time, changing the  MG4 barrel could not be easier. Significantly it can  be changed without using gloves, because the carrying grip is also the barrel change grip. This advantage comes into effect when the first barrel has heated up as a result of combat shooting. An additional key advantage: In the MG4, the barrel can be changed independently of the bolt position.

The bipod of the MG4 is robust and dirt resistant. It can be simply folded up and stowed away in the ergonomically formed handguard. This allows the user to hold and transport the MG4 as comfortably as an assault rifle. It can be rotated and has variable height adjustment — absolutely necessary for uneven terrain in combat situations.

An additional strength of the MG4: With other machine guns, heavy smoke development often impairs the user’s vision or irritates his eyes when shots are fired in rapid sequence. The MG4 overcomes this — it develops only a small amount of smoke whose escape is controlled towards the rear.

The cover to the feed tray can be simply flipped open in the firing direction. This allows the cartridge belt to be changed in a matter of seconds. Another strength: While doing this, the MG4 remains in the firing position.

The carrying sling, available as an accessory, allows the user different carrying modes and gives him absolute freedom of movement and immediate readiness to shoot in all firing positions. The hooks are simply inserted into the front and rear sling loops of the weapon. The carrying sling design facilitates easy carrying: at the side, in front of the body or on the back.

The MG4 can be mounted easily on the US M 122 gun-mount. In addition, it can be used as a secondary weapon. The ideal device for arming Mechanised Infantry Combat Vehicles for modern threat scenarios.

The carrying grip of the MG4 is attached at an optimum angle. This ensures minimum user effort when carrying it — a great advantage when changing the combat position.

The MG4 is fitted with a simple ambidextrous safety lever compared to other machine guns.

The as accessories available adapter is used for attaching the NATO standard 200-cartridge belt box and the 200-cartridge belt pouch centrally below the MG4. They can also be attached laterally without an adapter.