DEPARTMENT OF THE ARMY FM23-5 FIELD MANUAL U.S. RIFLE CALIBER.
*FM 22-5 HEADQUARTERS DEPARTMENTOFTHEARMY WASHINGTON, D.C., I7 Huy 1965 FIELD MANUAL No. 23-5 I U.S. RIFLE, CALIBER CHAPTER 1. 2. 3. 4. 5. 6. APPENDIX I. .30, Ml INTRODUCTION________________ _____ _ ____ ___________________ ____ _____________ MECHANICALTRAINING_______,____________________________________________ OPERATION AND FUNCTIONING__________ ______ __________________ _______ ___ STOPPAGES AND IMMEDIATE ACTION____ __-___________ __________ _____ _____ MAINTENANCE_____________________________.
CHAPTER 1 INTRODUCTION 1. Purpose and Scope a. This manual is a guide for commanders and instructors in presenting instruction and training in the mechanical operation of the Ml rifle.
Figure 1. 4 U.8. rifle, caliber 30, Ml.
CHAPTER 2 MECHANICAL 5. Disassembly and Assembly a. The individual soldier is authorized to disassemble his rifle to the extent called f&d stripping. Table I, Disassembly Authorization (para. 7)) shows the parts he is permitted to disassemble. This amount of disassembly is necessary for normal maintenance. b. The rifle should be disassembled and assembled only when maintenance is required or for instructional purposes.
b. To disassemble the rifle into the three main groups, first insure that the weapon is clear and then allow the bolt to go forward by depressing the follower with the right thumb and allowing the bolt to ride forward over the follower assembly. c. Place the rifle butt against the left thigh, sights to the left. With the thumb and forefinger of the right hand, pull downward and outward on the rear of the trigger guard.
rod to the rear until the rear of the handle is directly under the forward edge of the windage knob. With an upward and outward movement, disengage the guide lug of the operating rod through its dismount notch on the receiver. Remove the operating rod (fig. 7). Figure 4. Removing the follower spring. rod and operating rod Figure 6. Figure 5. Removing the follower Removing the Bullet guide, follower operating rod catch assembly. ~7n Pin. c.
Caution: The operating rod is bent intentionally so that it will not bind against the enlarged portion of the barrel. Do not attempt to straighten it. f. With the right hand, grasp the bolt by the operating lug and slide it fully to the rear; then slide it forward, lifting upward and outward to the right front with a slight rotating motion to remove it. g. Using the screwdriver blade of the Ml0 cleaning rod handle as shown in figure 8, unscrew and remove the gas cylinder lock screw. h.
Figure 8. 771-952-2 Remodlcg the gaa c@hder lock acrew.
. Assembly of the Three Main Groups a. Place the barrel and receiver group on a flat surface, sights down. Pick up the stock group . * i,*i:~,“’ 2:‘tr, v.m ; 1) ?.,LI . ‘*\p-” ‘Q’ * % and engage the U-shaped flange of the stock ferrule in the lower band, then lower the stock group onto the barrel and receiver group (fig. 17). 6. Unlatch and open the trigger guard.
OPERATING OPERATING ROD ROD SPRING UPPER HAND GUARD GAS ‘- / CYLINDER I FOLLOWER CYLINDER LOCK GAS / CYLINDER LOCK SCREW ARM I I I FOLLOWER PIN FdLLOWER ARM ASSEMBLY OPERATING ROD CATCH& -ASSEMBLY Figure 10. Parts of the barrel amd receiver group L the order of di8a88mb.@.
Figure 13. Figure 11. RepZucimg the operatdng rod. F&we 14. Figure la. 12 ReQtadng the bullet guide. RepZtadw the foZZoww wsmbZ% RepZacZng the operating rod catch aasembZg.
Figure c Replacing the follower 8P99W rod and operating Replacing the stock cm the bawel receiver group. and ‘d Figure Figure 16. 17. 18. Replacing the trigger houeing group.
CHAPTER 3 OPERATION AND FUNCTIONING 12. loading the Rifle a. Single mum?. To load a single round, pull the operating rod all the way to the rear. While holding the muzzle below the horizontal, place a round in the chamber and seat it with the thumb. With a knife edge of the right hand against the operating rod handle, force the operating rod slightly to the rear. Push down on the follower assembly with the right thumb and allow the bolt to ride forward.
tained on the top round in the clip. It may be to strike forward on the operating rod handle with the heel of the right’hand to fully close and lock the bolt. c. Pa&fatty fdkd clip. To load a partially filled clip, hold the rifle in the same manner prescribed for a full clip. With the operating rod all the way to the rear, place an empty clip into the receiver. Place the first round into the clip and on the follower, to the left of the follower slide.
Figure W. Loading rounda i&o a clip. bullet seal which could result in changes in the ballistic performance of the round. 15. Functioning of. the Rifle a. The trigger must be pulled to fire each round. When the last round is fired, the empty clip is automatically ejected and the bolt remains to the rear. 6. Each time a round is loaded and fired, many parts inside the rifle work in a given order. This is known as the cycle of operation. This cycle 16 is similar in all small arms.
ing gas, a small portion of the gas escapes through the gas port into the gas cylinder, forcing the operating rod to the rear (fig. 28). The camming surface inside the recess in the hump of the operating rod forces the operating lug of the bolt upward, disengaging the locking lugs from their IXXAXXW in the receiver. The bolt is thus unlocked and ready to be moved to the rear (fig. 29). Extracting is pulling the (3) E&raoting. empty cartridge case from the chamber.
GAS CYLINDERGAS PORT J Figure 89. Unlocking. Figure 2’8. Action of the gae. EXTRACTOR ENCAGED IN EXTRACTOR GROOVE ONEMPTY CARTFWXE BOLT EMPTY (7) (8) JO. Extracting. mer is forced into the proper position for firing the next round. This happens as the bolt continues to the rear. The rear end of the bolt forces the hammer back and rides over it. The hammer is caught by the sear if the trigger is still held to the rear, but it is caught by the trigger lugs if trigger pressure has been released (fig.
CHAPTER 4 STOPPAGES AND IMMEDIATE 16. Stoppages a. A stoppage is any unintentional interruption in the cycle of operation. b. Most stoppages occur because of dirty, worn, or broken parts, and lack of lubrication. The rifleman must be taught to watch for these defects and take corrective action to eliminate them before they cause a stoppage. Some of the more common stoppages, with their usual causes and remedies, are shown in table II (para 19).
worn, or remaining in an open position. It can be corrected by replacing the trigger assembly. c. The safety may release when pressure is applied to the trigger. This can be caused by -a broken safety or by the trigger stop on the safety being worn. It can be corrected by replacing the safety. Table II.
CHAPTER 5 MAINTENANCE 20. General Maintenance includes all measures taken to keep the rifle in operating condition. This includes normal cleaning, inspection for defective parts, repair, and lubrication. 21. Cleaning Materials, Equipment a. Cleanina lubricants, and YatemX.9. BOG cleaner (cleaning compound solvent (CR) ) is used primarily for cleaning the bore; however, it may be used on all metal parts for a temporary (l-day) protection from rust.
M3 CLEANING ROD CHAMBER BRUSH OILER & THONG CLEANING ROD CASE Ml0 CLEANING Figure GREASE CONTAINER 34. ROD Cleawing equipment. FABRIC CASE (HOLDS: ROD CLEANING. JOINTED. W/SPACER. M-ID) SPACER ECTIONS OF CLEANlh IG ROD AD SPACER OILER \HANDLE LEANING PATCHES TO PACK A MINIMUM NUMBER Figure 35. 22 (OF INSERTED ~-10 TO FILL TO KEEP Stowage AND THONG CLEANING IN SPACE. (FOR M-l PATCH.
ammunition now manufactured has a noncorrosive primer which makes cleaning easier, but no less important. The primer still leaves a deposit that may collect moisture and promote rust if it is not removed. The cleaning described below will remove all deposits except metal fouling which is relatively uncommon and is removed by maintenance personnel. (1) Chan&r. Remove the patch holder from the cleaning rod and insert two patches about halfway through the slot.
b. The daily inspection should also reveal any defects such as burred, worn, or cracked parts. Defecta should be reported to the armorer for correction c. A muzzle plug should never be used on the rifle. It causes moisture to collect in the bore, which causes bore rust that is a safety hazard. o?. Obtaining the proper rear sight tension is extremely important ; without it the sight will not hold its adjustment in elevation.
tures or when the rifle is exposed to extremes of sand and dust. c. In cold climates (temperatures below freezing) the rifle must be kept free of moisture and excess oil. Moisture and excess oil on the working parts cause them to operate sluggishly or fail completely. The rifle must be disassembled and wiped with a clean, dry cloth. Drycleaning solvent may be used if necessary to remove oil or grease. Parts that show signs of wear may be wiped with a patch lightly dampened with lubricating oil (LAW).
CHAPTER 6 AMMUNITION 25. General The Ml rifle fires several types of ammunition. The rifleman should be able to recognize them and know which type is best for certain targets. 26. Description The types of ammunition are identified by their individual markings. a. BaU, Jf$. This cartridge is used against personnel and unarmored targets, and can be identified by its unpainted bullet. b. Armor Piercing, Jig.
APPENDIX I REFERENCES FM FM FM FM TM TM DA 21-5 21-6 21-40 23-71 3-220 9-1900 Pam 108-l Military Training. Technique of Military Instruction. Small Unit Procedures in Chemical, Biological, and Radiological (CBR) Operations. Rifle Marksmanship. Chemical, Biological, and Radiological (CBR) Decontamination. Ammunition, General. Index of Army Motion Pictures, Filmstrips, Slides, and Phono-Recordings. By Order of the Secretary of the Army: HAROLD K. JOHNSON, General, United States Army, Official : J. C.
