![]() The M109 is fitted with night-vision equipment, but does not have nuclear, biological and chemical (NBC) warfare protection. The tracks are of a single-pin, center-guide type with replaceable rubber pads. The torsion bar suspension on either side consists of seven dual rubber-tired road wheels with the drive sprocket at the front and the idler at the rear. ![]() They are normally deployed only when firing top charges. Mounted at the rear of the hull on each side of the hull door is a large spade that is manually lowered to the ground before firing. The twin doors at the rear of the turret are provided for ammunition resupply. ![]() The gunner is seated on the left side of the turret and has a square single-piece hatch cover that opens to the right. 50-cal M2 heavy-barrel machine gun is pintle-mounted on the front of the cupola. The commander is seated on the right side of the turret and has a cupola that can be traversed through 360 deg, a single-piece hatch cover that opens to the rear and an M27 day periscope. The all-welded aluminum armor turret at the rear of the hull has a square hatch in each side that opens to the rear and twin doors in the turret rear. The Detroit Diesel Model 8V-71T engine is coupled to an Allison Transmission XTG-411-4A cross-drive transmission. One of the day periscopes can be replaced by a passive night-vision periscope. These can be covered with small metal flaps to prevent damage. The driver is provided with a single-piece hatch cover that opens to the left, with three M45 day periscopes in front. The driver is seated at the front left of the hull, with the powerpack to the right and the turret at the rear. ![]() The hull is made of all-welded aluminum armor, which protects against small-arms fire and shell splinters. The M109 has a crew of six: commander, gunner, driver and three ammunition members. Later versions, including the M109A6 Paladin, have a 39-caliber barrel. Early variants had a short, 23-caliber barrel. It is a large tracked vehicle with a fully traversable turret and prominent bustle. The widely used M109 carries a 155-mm howitzer and is the principal self-propelled artillery support for U.S. Categories Army Equipment Army Weapons Cannons Infantry Weapons WeaponsĪrmament: M126 155 mm Howitzer. ![]()
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