Item:
ONSV2625

Original British WWII Ordnance SBML Two-Inch Mortar Inert Round - Dated 1943

Regular price $425.00

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Item Description

Original Item: Only One Available. Totally inert per guidelines provided by the Bureau of Alcohol Tobacco and Firearms (ATF) this is a very nice WWII-dated example of an Inert Round for the British British Ordnance SBML Two-Inch Mortar. The propellant and explosive charge have been removed and the fuse deactivated, making this totally inert, and unable to be converted into an explosive device.

This example is in very good condition, and all of the major components are marked and dated. It also disassembles as it would have originally. The top of the fuse cap is marked:

REMOVE
BEFORE
FIRING

The side of the fuse is marked around the base with a broad arrow, as well as with identification, maker and date markings:

151A I-PC/C - 3 AB Sc/C 2/43 54

This is a No. 151 Percussion fuse, dated 1943, which was usually used with the HE (High Explosive) rounds used with the 2 inch mortar. Additionally, the side of the main housing is marked and dated as well:

2 MOR I LOT 138
N.S.Co. 8/43

It is also marked on the finned bottom with 10/44 and a British broad arrow, as well as a G in a circle, most likely the manufacturer mark. Usually, the round main housing would be painted, to indicate the type of round it was, however this example had the paint stripped during deactivation, so we cannot tell with a certainty the type of round it was. However the type of fuse definitely indicates that it would have been the standard HE type.

In great condition, with lots of markings, ready to display!

More on the 2-Inch Mortar:

The ordnance SBML two-inch mortar, or more commonly, the "two-inch mortar", was a British mortar issued to the British Army and the Commonwealth armies, that saw use during the Second World War and later. It was more portable than larger mortars, and the two-inch (51mm) had greater range and firepower than rifle grenades

The standard service version of the 2-inch (51 mm) mortar had a barrel length of 21 inches (530 mm) and could fire a high explosive bomb weighing 2.25 lb (1.02 kg) out to a range of 500 yards. With such a short barrel the normal firing method, where the bomb was dropped down the tube and a pin in the base of the barrel struck the detonator in the tail of the bomb, would not work so firing was by a small trigger mechanism at the breech. Originally the two-inch mortar was fitted with a large collimating sight with elevating and cross-level bubbles, but this was soon dropped as unnecessary for front-line use. It was replaced with a simple white line painted up the length of the barrel. The firer only had to line this up in the direction of the target and fire a number of bombs for effect. While this method of operation appeared rather haphazard, it worked well and the practice continued long after the war. The mortar evolved in other directions too, with the original large base plate being replaced by a simple curved model, to give it a combat weight of 10.25 lb (4.65 kg). Due to its small size, and for simplicity, the mortar had no forward strut or bipod that most larger designs needed. The barrel was held at the correct angle by one soldier while the other loaded and fired the round. It could achieve a firing rate of some eight rounds per minute. The bombs were cylindrical with a perforated four-finned tail. For the HE projectiles an impact fuze was fitted in the nose of the bomb. The illuminating round weighed 1 lb (0.45 kg) and the smoke round weighed 2.25 lb (1.02 kg). A whole range of other ammunition was also developed, including a specialized bomb that cast a lightweight explosive-filled net over minefields which could be detonated, clearing a path.

Variants of the weapon itself included the Mk VII* with a shortened barrel, for use by airborne units, the Mk VII for use in Universal Carriers and the Mk III used as a smoke discharger in tanks.

Post war, the two-inch mortar was kept in service to fire smoke and illuminating rounds. It remained in service until the late 1980s when it was replaced by the L9A1 51 mm light mortar.

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