M1903A3 MANUAL PDF

This manual is published for the information and government of the Regular Army and Organized Militia of the United States. By order of the Secretary of War. Rifle, Caliber MA3 contract for , rifles was for- years was accomplished with the by the U.S. Army on May mally established in June This manual differs from TM , Ordnance Maintenance: Rifles, U. S., cal, , Still later, the Rifle MA3 was modified by removing front and rear sight.

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Full text of ” Ordnance maintenance: This Technical Manual is published for the information and guidance of ordnance maintenance personnel.

It contains detailed instructions for disassembly, assembly, inspection, maintenance, and repair of manaul materiel listed below. Additional descriptive matter and illustrations are included to aid in providing a complete working knowledge of the materiel.

These instructions are supplementary to those in Field Manuals and Technical Manuals prepared for the using arms. Ml Cover, front sight b. This manual differs from TMOrdnance Maintenance: This information is supplementary to that con- tained in TM The basic rifle of the group covered in this manual is the U.

This rifle, generally known as the Springfield rifle, has been in service for many years. Subsequently a pistol grip type stock replaced the straight grip type stock and, with manuak rifle so modified, the designation was changed to U.

Later, the Rifle Ml was modified in manufacturing details, the rear sight and fixed base removed and an adjustable rear sight of different design mounted on the bridge of the receiver, a barrel guard longer than and substituted for the hand guard, and a stacking swivel band added This modified rifle was designated as U. Still later, the Rifle MA3 was modified by removing front and rear sight groups, assembling an MA1 type stock, mounting a telescopic sight on the top of the receiver, and designated as U.

Maanual characteristics of the various models are explained in paragraph 3. Recently manufactured stocks do not have the grooves cut in the sides for gripping, as shown in figure 1. As manuall Rifle M is the basic rifle and the Rifle MA1 identical with the exception of the stock, these two may be considered as one rifle in this manuaL As all of the four rifles covered herein are basically the same in mechanism, operation, and functioning, the disassembly and assembly, inspection, maintenance, and repair are covered to apply generally.

Exceptions with regard to the models are noted where they apply. General illustrations are of the Rifle MA1, but apply to the other models unless specified otherwise in the text Likewise, illustrations of the Rifle M A3 apply to the MA4 unless specified otherwise.

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A list of parts for all four rifles covered herein is contained in SNL B-3, with parts common to any one model only, so indicated 3. This rifle is a breech-loading magazine weapon of the bolt type. The magazine will hold five cartridges, and one addi- tional cartridge may be inserted in the chamber, thus making the mmanual capacity for any one loading six shots. To facilitate the m193a3 ing of the magazine, cartridges are ordinarily put up in brass clips holding five cartridges each.

The magazine, however, may be loaded by inserting single cartridges by hand, one after the other. The leaf is graduated from to 2, yards. The drift slide, which may be moved up or down on the leaf, has two notches called open sights and a circular hole called the peep sight With the leaf raised to the vertical position, the lines on either side of the peep sight and on either side of the lower open sight notch enable the majual to set the drift slide accurately at any manjal graduation on the leaf.

With the leaf and slide in the down position, and using the manuao sight notch which is cut in the slide cap, the sights are set for yards. Each graduation corresponds to a lateral deviation in the point of impact of the bullet of 4 inches for each yards of range mnual the target.

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It varies front 10 to 15 shots per minute. The effectiveness of rifle fire during com- bat decreases as the range to the target increases. M1903w3 use at ranges greater than yards is unusual 4 Boring. Originally the barrel of this rifle was manuap with four grooves with a right-hand twist, and 1 turn in 10 inches.

Recently manufactured barrels are bored similarly but with only two grooves instead of four. This change in manuak applies to all models of this rifle covered in this manual. This rifle is identical with the Rifle Ml described in subparagraph a, above, with the excep- tion of the stock assembly.

The Rifle MA1 has a pistol grip type stock whereas the Rifle Ml 90 3 has a straight grip type stock. This rifle is basically iden- tical with the Rifle M described in subparagraph a, above. Prin- cipal variations are in the front and rear sight groups and the design of a few parts as explained below.

Like parts are not all inter- changeable, and replacements should be made according to parts listed in SNL B Parts of the Rifle M A3 manul vary in design may be found in recently manufactured M and MA1 Rifles, pro- vided they are interchangeable. The stock is similar to that of the Rifle M, except that the pistol grip is optional on the M A3, whereas the M did not have the pistol grip. Some of 1m903a3 M A3 Rifles issued had front and rear stock screw pins running laterally through the center portion of the stock to reinforce the trigger guard and magazine aper- ture in place of the front and rear stock screws and nuts assembled to the Rifle M Front and rear stock screws and nuts are now standard for the Rifle M A3.

In this rifle, the folding leaf type of rear sight and fixed base, such as used on the Rifles M and MA1, are removed from the rear end of the barrel; and a rigid, wing type of rear sight is assembled to the bridge of the receiver fig.

This sight consists of a base, windage yoke, slide aperture, spring, and windage index knob, and their components. The range scale on the windage yoke is marked in yard graduations, and has yard adjustments. The slide aperture can be moved up manaul down this scale for various ranges. Turning the windage index knob moves the yoke to the right or left to allow for windage. Each click represents a change of 1 minute of angle or a horizontal change of impact of 1 inch at a range of yards.

Each division or mark on the windage scale represents 4 minutes of angle or a change in the point of impact of 4 inches at a range of yards.

In this rifle, a barrel guard fig. In the Rifle M, the stacking swivel is of round wire and pivoted to the upper band. In the Rifle M there is an open- ing in the top of the upper band, and but one bayonet stud. The swivel in the Rifle M is of round wire, arid the lower band is grooved for reinforcement 5 Trigger Guard Magazine Assembly fig.

In maunal Rifle M A3, the magazine spring is clipped to the follower only, which may be either the M or MA3 follower, and must be removed from the top opening of the magazine, or to- gether with the trigger guard magazine assembly as explained in paragraph 7 d. The front sight group is com- posed of a flat front sight pinned in a slot in a ring type sight base which is keyed and pinned to the muzzle end of the barrel.

The sight is furnished in five heights, from 0. The front sight group of the Rifle M is composed of a flat front sight, manjal movable stud, and a fixed stud fig. This group is similar to that of the Rifle M but composed of metal stampings instead of machined pieces. The butt plate trap is fastened in the butt plate assembly and m1903x3 easily removable as in the case of the butt plate cap M fig.

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The parts comprising the bolt group are basically the same as those of the Rifle M fig. The follower is a sheet metal stamping with a straight ridge running longitudinally on the top side. A portion of the follower near the front narrow end is bent downward and inward on both sides to seat the magazine spring, and there is a projection on the rear end to hold it in position. The follower M is a machined piece with an undercut pad on the bottom of the front end to seat the magazine spring, and a pad on the bottom of the rear end to hold it in position fig.

The raised ridge on the top of the follower M19G3 has two relief cuts on the left side. As either of these followers may be found assembled in any of the rifles covered in this manual, identification is necessary when removing the follower, as explained in the section on disassembly and assembly. Figure 37 shows top and bottom views of both types of followers for identification. In addition, it has a bolt handle notch cut into the right side of the stock, to accomodate the modified bolt handle.

Car- tridges are inserted into the magazine by hand, one at a time, or the rifle used as a single loader. This sight gives a magnification of 2. The adjusting mechanism is located in the rear end of the sight tube.

When mounted, the wind- age adjusting screw is on the left and the elevation adjusting screw on the top, with respect to the rifle.

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This sight is furnished with a dust cap assembly for protection of the lenses. It consists of a large and small leather cap connected by a strap. The large cap is placed over the rear eyepiece end of the sight and the small cap over the front end.

The caps are then turned in opposite directions to take up the slack in the strap by twisting it around the sight tube. The mounting of the sight and assembly of the mount base to the rifle are explained in section II of this manual.

The Rifle MA4 is not equipped with a bayonet. The one is the Bayonet M which is furnished with either the fabric covered Scabbard M or the plastic Scabbard M3 figs. This bayonet has wooden grips and a single edged, inch blade.

The other bayonet is the Ml furnished with the plastic Scabbard M7 fig. The gun sling M leather manul Ml web is used on all four rifles covered in this manual.

Mznual slings are shown in figure The slings M and M C can also be used. It is snapped on over the front sight with the sloping portion to the rear. Weight of- Rifles M and MA1 without bayonet or gun sling 8. Over all length of rifles with Bayonet M Over-all length of rifles with Bayonet Ml Diameter of bore 0.

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Twist in rifling, uniform right-hand, one turn in Number of grooves in barrel early design 4 Number of grooves in barrel late design 2 Depth of grooves in barrel both designs 0. Sight radius, Rifles M and MA1 Sight radius, Rifles M and MA1, battle sight set Sight radius, Rifle MA3 for yd Maximum graduation of sight M and MA1. Maximum range 1, yd Magnification 2. Weight with mount rings attached 0.

Ammunition Ml, per square inch mean 48, lb Ammunition M2, per square inch mean 50, lb Shipping weight m1093a3 10 Rifles, M, MA1, and M A3 packed in standard container The manual operation and the mechanical function- ing of the moving parts and mechanisms of the rifle are so closely related that they are described together in the order of their perform- ance.