inert 106mm M346A1 HEP-T recoilless rifle round
Vietnam War Artillery Shell recoiless cannon 105mm
Used Condition
FFL is not required
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8/11/2017 8:32 AM
Item 676711427
Location Paris, TN 38242
Buyer pays estimated shipping for the following option(s): Priority
No international shipments
Payment Visa / MasterCard, Discover, USPS Money Order, See Item Description
Checkout Yes, Immediate
Sales Tax
Seller must collect sales tax from the following states:
TN 9.75%   
Inspection/ Return Policy
AS IS - No refund or exchange

The seller of this item assumes all responsibility for this listing. You must contact the seller to resolve any questions or concerns before placing a bid. Payment must be made using U.S. dollars ($) unless otherwise stated in the listing. Firearms may only be shipped to a licensed dealer (FFL Holder). Some listed items may not be legal in every state. Complete your purchase within the law.

Please read the Item Characteristics for important listing details.

Inert 106mm M346A1 High Explosive Plastic-Tracer round, for use in the M40 series 106mm recoilless rifles. The round is in beautiful condition, and is extremely impressive, standing over 3-feet tall! The projectile is close to mint condition, and the cartridge case is very nice......with original lacquer coating over the steel. Would make a stunning display piece in any private collection, gun shop, firing range, man cave, or museum. Would make a fantastic compliment to any M40 106mm recoilless rifle display. The round weighs 17 pounds, measures 37-inches in length, and just over 4-inches in diameter. The projectile is crimped into the cartridge case, and cannot be removed. This is not a repainted drill cartridge, but is an actual inert M346A1 HEP-T cartridge. These rounds are getting quite hard to find, especially in this condition! Please take a look at all of our inert ordnance auctions here on GunBroker!/b>

The M40 recoilless rifle is a lightweight, portable, crew-served 105mm weapon intended primarily as an anti-tank weapon made in the United States. The weapon is commonly described as being 106mm, but it is in fact 105mm; the 106mm designation was designed to prevent confusion with the incompatible 105mm ammunition from the failed M27. It could also be employed in an antipersonnel role with the use of the antipersonnel-tracer flechette round. It can be fired primarily from a wheeled ground mount. The air-cooled, breech-loaded, single-shot rifle fired fixed ammunition. It was designed for direct firing only, and sighting equipment for this purpose was furnished with each weapon. The M27 recoilless rifle was a 105mm weapon developed in the early 1950s and fielded in the Korean War. Although a recoilless rifle of this caliber had been a concept since the Second World War, the weapon was hurriedly produced with the onset of the Korean War. The speed with which it was developed and fielded resulted in problems with reliability caused by trunnions that were mounted too far to the rear. The M27 was also considered too heavy by the U.S. Army and had a disappointing effective range due to the lack of a spotting rifle. Taking the M27 as the basis for a new design, the Army developed an improved version of the M27 that was type-designated the M40 106-mm recoilless rifle in 1955. Originally, along with its type-designation, it was also given the official name BAT for Battalion Anti-Tank gun, but that was soon dropped. Although unsuitable for military purposes, M27 recoilless rifles were used to trigger controlled avalanches at ski resorts and mountain passes in the United States. The M40 primarily saw action during the Vietnam War. It was later replaced by the BGM-71 TOW anti-tank missile system. The weapon was also used by anti-communist forces in Angola mounted on Land Rovers. The M40 is shaped like a long tube with an M8C .50 cal spotting rifle above. The spotting rifle fires a round whose trajectory closely matches that of the 105mm round and gives off a puff of smoke on impact with the target. On the left side, there is an elevating wheel, in the center of which is the trigger wheel used to fine adjust the elevation and at the same time firing the spotting rifle when pulled, and the gun when pushed. The mounting is a tripod, but the front leg has a caster wheel. On top of the mount is a traverse wheel. On the center of the traverse wheel is a locking wheel, when the wheel is down, the rifle is locked in traverse, and can only be moved right and left with the traverse wheel. When the wheel is raised, the rifle can be traversed by hand. Austria produced a two-wheeled mount for the M40. The whole mounting can be placed on an M151 Jeep for mobile use. It has also been mounted on M38A1 Willys Jeep, Land Rover Defenders, M113s, Mercedes-Benz G-Wagen, HMMWVs, Hotchkiss M201 jeeps, Toyota Land Cruisers, AIL Storms and M274 Mechanical Mules. They were also used on US Navy minesweepers (MSO) during Operation Market Time in Vietnam. A special vehicle called the Ontos carried six M40s. A version specific to the T195E5 mount, the M40A1C, was used. It was used only by the U.S. Marine Corps. Japan produced a self-propelled gun called the Type 60, which carried two side by side. Some Pakistani M113s have a dual mounting. The M40 was a very successful export item and continues to be used by South Korea (ROK), Ecuador, Egypt, Estonia, Greece, Honduras, Iran, Israel, Lebanon, Malaysia, Mexico, Morocco, the Philippines, Taiwan (Republic of China Marine Corps), Turkey, Colombia, Cambodia, Vietnam, Venezuela and many others, as well as anti-government forces in the Libyan Civil War and Syrian civil war. Ammunition for the 106mm rifle was issued as one-piece fixed cartridges. The term "fixed" means that the projectile and the cartridge case are crimped together. This ensures correct alignment of the projectile and the cartridge case. It also permits faster loading because the projectile and the cartridge case are loaded as one unit. The rear end of the cartridge case is perforated, to allow the propellant gas to escape through the vented breech, thus neutralizing recoil. Most projectiles (except HEAT) used are pre-engraved, that is, the rotating bands are cut to engage the rifled bore. If the round was not rotated slightly when loading the M40 it could result in jamming in the breech. Types of ammunition included High Explosive Anti-Tank (HEAT), High Explosive Plastic-Tracer (HEP-T), canister, High Explosive Anti Personnel, and the M368 dummy round which could not be fired and was used for crew drill. HEP-T rounds are thin metal shells filled with plastic explosive and a delayed-action base fuze. The plastic explosive is "squashed" against the surface of the target on impact and spreads out to form a disc or "pat" of explosive. The base fuze detonates the explosive milliseconds later, creating a shock wave that, owing to its large surface area and direct contact with the target, is transmitted through the material. In the case of the metal armor of a tank, the compression shock wave is conducted through the armor to the point where it reaches the metal/air interface (the hollow crew compartment), where some of the energy is reflected as a tension wave. At the point where the compression and tension waves intersect, a high-stress zone is created in the metal, causing pieces of steel to be projected off the interior wall at high velocity. This fragmentation by blast wave is known as spalling, with the fragments themselves known as spall. The spall travels through the interior of the vehicle at high velocity, killing or injuring the crew, damaging equipment, and/or igniting ammunition and fuel. Unlike high-explosive anti-tank (HEAT) rounds, which are shaped charge ammunition, HEP-T shells are not specifically designed to perforate the armor of main battle tanks. HEP-T shells rely instead on the transmission of the shock wave through the solid steel armor. HEP-T ammunition has good general purpose use, being effective against most targets, though the round is generally used at relatively low velocities because high velocity excessively disperses the pat of explosive. While only effective against tanks without spaced armor or spall liners, the round is still highly favored for combat demolition purposes. The flattened high-velocity explosive pat is capable of destroying concrete constructions much faster than a HEAT round (which is designed for armor penetration), and without the dangerous fragmentation of a traditional high-explosive (HE) fragmentation round. The ammunition for the 0.50 cal spotting rifle is not .50 BMG. The round used is a special round designed to simulate the flight path of the 106mm ammunition. Although the spotting rifle could conceivably be used in an antipersonnel role, historical U.S. military doctrine strongly discouraged this use. This limitation was entirely tactical in nature, having been intended to help conceal the vulnerable M40 and its crew from the enemy before the main anti-tank gun could be fired; however, this restriction is believed to be the source of a long-standing misconception that the laws of war (Geneva Convention) restrict the use of .50-caliber projectiles against enemy personnel.

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