M37
From the Metal Gear Wiki
[edit] Overview
The M37 is an American-made shotgun. First appearing in 1937, the Ithaca M37 is sometimes called the "Featherlight" due to its light weight. MGS3's M37 has a sawed-off barrel and stock, further reducing the weight to 2.9 kg (6.4 lbs), which is exceptionally light for a shotgun. It carries four 12-gauge shells in a tube magazine and operates using a pump action, meaning there is a delay in between shots. Many guards carry the M37, and Snake can even use one himself. The M37 is extremely powerful, capable of blowing enemies away and doing serious damage. Most guards will be killed in one blast, but the shot's effectiveness decreases over range. The Pain's hornet shield can be penetrated by three shotgun blasts, leaving him vulnerable.
[edit] Location
Snake obtains the M37 in Rassvet during the Virtuous Mission, though loses it once he is thrown into a river in Dolinovodno by The Boss. During Operation Snake Eater, Snake obtains the shotgun in Chyornaya Peschera Cave, immediately before the battle against The Pain.
