Defence · In-house products
Mustad Universal Sight Mount
for .50 cal M2 HB, M2 QCB and M3 machine guns.
Who makes a universal sight mount for the .50 cal M2 machine gun?
Mustad Belgium designs and produces the Universal Sight Mount in Eupen, Belgium, for .50 calibre M2 HB, M2 QCB and M3 machine guns. Developed by our engineers, it is machined as a monobloc body from aerospace-grade aluminium, with three PICATINNY rails compliant with STANAG 4694 and tool-free cam-lock fitting.
Why the Universal Sight Mount?
One mount for three machine guns
M2 HB, M2 QCB and M3 chambered in .50 NATO.
Fitted in the field, without tools
Three cam-lock levers: two lock the mount onto the receiver, the third provides lateral stability.
Your optics return to the same position
Every rail slot is numbered: after removal, the optic goes back in exactly the same place.
Original sights remain usable
Rear and front sights retained on the M2 HB and M2 QCB.
Modernise without replacing the weapon
Scopes, red dot sights and laser rangefinders on machine guns already in service, extending their operational life.
Rigid and durable
A monobloc body, machined from a single block of aerospace-grade aluminium.
A proven product, not a prototype.
One of our customers asked us to make a sighting mount for a machine gun. Mustad designed it, industrialised it and now has it in series production.
Compatibility and materials.
- WeaponsM2 HB, M2 QCB and M3 machine guns chambered in .50 NATO
- Rail standardSTANAG 4694, MIL-STD 1913 (PICATINNY) compatible
- RailsOne 15-slot top rail and two 9-slot side rails, every slot numbered
- OpticsOptical scopes, red dot sights, laser rangefinders
- Iron sightsRear sight and front post preserved on M2 HB and M2 QCB
- BodyMonobloc, machined from aerospace-grade aluminium
- FinishesHard anodizing on aluminium, QPQ treatment on steel parts, carried out with our qualified partners
- NMCRL1005/17/117/5026
Frequently asked questions about the Universal Sight Mount
What is the Mustad Universal Sight Mount?
The Mustad Universal Sight Mount is a sighting support designed and produced in-house by Mustad Belgium for .50 cal M2 HB, M2 QCB and M3 machine guns. It is machined as a monobloc from aerospace-grade aluminium and carries three PICATINNY rails compliant with STANAG 4694.
Which machine guns is the Universal Sight Mount compatible with?
It fits M2 HB, M2-QCB and M3 machine guns chambered in .50 NATO. Its geometry preserves the original iron sights on M2 HB and M2 QCB, so backup aiming stays available without removing the mount.
Can the mount be fitted without tools?
Yes. The mount is secured by three cam-lock levers — two vertical levers locking to the top plate of the receiver, one horizontal lever for lateral stability. No tools are required for installation or removal, making it field-operable.
Does Mustad Belgium develop its own products?
Yes. Alongside build-to-print production for defence OEMs, Mustad designs proprietary products. The Universal Sight Mount is the published example: specified, engineered, machined and assembled in Eupen, with surface treatments carried out by our qualified partners.
More questions? Read the full FAQ
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