OOW M2HB QCB

OOW M2HB QCB


Heavy machine guns 12.7×99 mm NATO
Quick-change .50 cal
heavy weapon system

A short-recoil, belt-fed .50 calibre heavy machine gun incorporating a quick-change barrel system with preset headspace. The QCB configuration retains the established M2HB architecture while significantly reducing barrel-change time:
proven capability with rapid barrel replacement.

.50 / 12.7×99 NATO
Quick-change barrel
M9 linked belt
Short recoil

Preset-headspace QCB architecture

The Quick Change Barrel configuration preserves the capabilities and maintenance approach of the M2HB while reducing the time and procedural burden associated with replacing a hot barrel.

01

Quick-change barrel

A trained operator can replace the QCB barrel in under ten seconds, according to the published product information.

02

Preset headspace

Preset headspace removes the need to reset headspace and timing during each qualified QCB barrel change.

03

Legacy conversion

Conversion kits are available to provide compatible older M2HB systems with QCB functionality.

04

Bilateral belt feed

The M9 linked-belt feed can be arranged for left- or right-side operation through the specified parts change.

M2HB capability with faster barrel replacement

Ohio Ordnance Works specialises in the M2HB .50 calibre platform. The QCB version retains the protection, firing capability and maintenance familiarity associated with the established heavy-barrel system while introducing a substantially faster barrel-change procedure.

Published information states that a trained operator can change a hot QCB barrel in under ten seconds, compared with approximately ninety seconds for a traditional M2HB procedure that requires headspace and timing to be set after the change.

TypeQuick-change-barrel heavy machine gun
SKUM2A1-100E
Calibre.50 / 12.7×99 mm NATO
OperationShort recoil
FeedM9 linked belt
Feed directionLeft or right with specified parts change
FinishPhosphate
Empty weight84 lb / 38.1 kg
Overall length65 in / 165 cm
Barrel length45 in / 114.3 cm
Published rate of fire450–600 rounds per minute
Maximum range6,800 m
Effective range1,800 m
Muzzle velocity3,055 ft/s / 930 m/s
Published QCB change timeUnder 10 seconds by a trained operator
Legacy conversionQCB conversion kits available for compatible M2HB systems

Licence-controlled firearm

Sale, possession, transfer, transport and use are permitted only in accordance with all applicable laws and regulations. This information never replaces the official manual, safety instructions or legal obligations. Published values may vary by configuration, mounting arrangement and authorised ammunition type.

Logo