The modern revolver is an arm with a revolving cylinder holding five or six cartridges, which are at the instant command of the shooter before it is necessary to reload. It is designed for heavy charges, and is a practical and formidable weapon. Revolvers are made in great variety, and adapted for various purposes, such as military service, target shooting, pocket weapons, etc. The best grades of pistols and revolvers may be had at a reasonable price. The cheap grades with which the market is at all times flooded should be avoided. They are incapable of doing good work, and frequently are positively dangerous, on account of being made of inferior materials.

The magazine or automatic pistol is the latest type of hand firearm. It is a multishot pistol in which the mechanism is operated automatically by the recoil. Pulling the trigger is the only manual operation necessary to fire successive shots until the supply of cartridges in the magazine (usually six to ten) is exhausted. The first models were introduced about 1898. These had many defects and objections, such as failure to function regularly, danger in manipulation due to insufficient safety devices, poor balance, unsightly lines, etc. Nevertheless the advantages of this type of arm over the revolver for military purposes in effective range, rapidity of fire, accuracy, interchangeability, etc., were soon recognized and manufacturers were encouraged to improve and perfect them.

Practically all the mechanical defects referred to have been corrected, the balance and the lines improved, and safety devices introduced so that these arms are now well adapted for military use and are rapidly superseding the revolver as service weapons in the United States army and navy. A synopsis of the severe tests leading to the adoption of a magazine pistol by the War Department of the United States government may be found in the Appendix.

Military Arms.—The revolver and the magazine pistol are used for military service. To fulfill the requirements these arms must be strong, very durable, and withstand a great amount of hard usage without becoming disabled. The effectiveness, or “stopping power,” is of prime importance. The caliber should be large, the bullet should have a blunt point, and the powder charge should be sufficiently powerful to give a penetration of at least six inches in pine. There was a tendency some years ago to reduce the caliber of military revolvers. While this resulted in increased velocity and penetration, and reduced the weight of the ammunition, it did not improve the stopping power of the arms.

The ineffectiveness of the .38-caliber service revolver charge was frequently complained of by the officers and men serving in the Philippine Islands. This was due to the light powder charge and the conoidal shaped point of the bullet. To remedy this weakness .45-caliber revolvers were issued for the Philippine service, and a new .45-caliber cartridge designed to which magazine pistol manufacturers were invited to adapt an arm. Unfortunately this new cartridge, which is now the service ammunition, has also a conoidal pointed bullet, is not well proportioned, and consequently develops only a part of its stopping power possibilities.

The sights must in all cases be very substantial, and solidly fixed to the frame or barrel. The trigger pull varies from 4 to 8 pounds, the barrel from 4 to 7½ inches in length, and the weight from 2 to 2¾ pounds. Ammunition loaded with smokeless powder is now invariably used for military service.

The service revolvers still in use in the United States army and navy are the Smith & Wesson and Colt, both .38 caliber, and taking the same ammunition. They have passed the prescribed series of tests as established by the United States government,[3] and as improved and perfected represent, without doubt, the highest development of the military revolver.

These arms, shown in Figs. 1 and 2, have solid frames, and the actions are almost identical, the cylinder swinging out to the left, on a hinge, when released by a catch. The shells may then be extracted simultaneously by pushing back the extractor rod. The Smith & Wesson has an additional hinge-locking device in front of the cylinder. The Colt has an automatic safety lock between the hammer and the frame, permitting discharge only when the trigger is pulled. Apart from these features there is very little difference between these arms.

The Smith & Wesson .44-caliber Military Revolver is the latest model of the large caliber revolvers. Its action and general lines are the same as the .38-caliber military, but it is a larger, heavier, and more powerful weapon.

Other excellent military revolvers are the Colt New Service and the Smith & Wesson Russian model, usually in .45 caliber and .44 caliber, respectively. The ammunition for these arms was formerly loaded with black powder; but smokeless cartridges have been adapted to them, which give slightly increased velocity and the same accuracy. (See [Fig. 4], facing p. 24.)