SECTION II

ASSEMBLIES, GROUPS, AND PARTS OF RIFLE

2. General statement.-For convenience the parts of the rifle have been grouped together in " groups' " and "assemblies." A group is a number of parts which function together in the rifle and which are naturally intimately related to each other and should, therefore, be considered together. An assembly consists of two or more parts which are either permanently or semipermanently assembled and should not ordinarily be taken apart. An assembly is frequently issued as a unit for maintenance purposes. The groups, assemblies, and individual parts are listed in the following paragraphs of the section in the order in which they would be taken from the rifle in case the later was completely disassembled.

3. Bolt and firing pin group.-The bolt and firing pin group can be removed from the rifle as a unit, and includes the extractor; the bolt assembly, consisting of the bolt and the extractor collar; the striker; the firing pin sleeve; the mainspring; the bolt sleeve assembly; the safety lock assembly; and the firing pin assembly.

4. Ejector group.-The ejector group consists of the ejector and the ejector pin.

5. Bolt stop assembly. The bolt stop assembly consists of the bolt stop pin and the bolt stop spring permanently riveted together in manufacture.

6. Cut-off group.-The cut-off group includes the cut-off, the cut-off spindle, the cut-off screw, and the cut-off spring.

7. Floor plate group.-The floor plate group includes the floor plate, the floor plate catch, the floor plate pin, and the floor plate spring.

8. Magazine spring.-The magazine spring; the smaller end slides into the under cuts on the follower, and the larger end fits in the same way into the undercuts in the floor plate.

9. Follower.-The follower, which serves to locate the cartridges in the magazine and guides the last cartridge into the chamber.

10. Guard group.-The guard group consists of the guard, the guard screw bushing, the rear guard screw, and the front guard

screw.

11. Sear and trigger group.-The sear and trigger group includes the sear, the sear spring, the sear pin, the trigger, and the trigger pin.

12. Front sight group.-The front sight group includes the movable stud assembly and the front sight screw.

13. Rear sight assembly.—The rear sight assembly includes the rear sight movable base, the rear sight windage screw, the rear sight windage screw collar, the rear sight windage screw spring, the windage screw knob, the rear sight base spring, the rear sight leaf, the rear sight joint pin, the rear sight slide, the rear sight slide cap, the rear sight slide cap screw, the rear sight slide binding screw, the rear sight slide cap pin, the rear sight drift slide, and the rear sight drift slide pin.

14. Butt plate assembly.-The butt plate assembly includes the butt plate, the butt plate cap, the butt plate pin, the butt plate spring, and the butt plate spring screw.

15. Butt plate screws.-The butt plate screws, large and small, secure the butt plate to the stock.

16. Butt swivel assembly.-The butt swivel assembly includes the butt swivel, the butt swivel pin, and the butt swivel plate.

17. Butt swivel screws.-The butt swivel screws are the same as the butt plate screw, small, and serve to attach the butt swivel plate to the stock.

18. Lower band group.-The lower band group includes the lower band, the lower band screw, the lower band swivel, and the lower band spring.

19. Upper band group.-The upper band group includes the upper band, the upper band screw, the stacking swivel, and the stacking swivel screw.

20. Stock. The stock. The large hole in the butt is for decreasing weight, and the smaller one is a pocket for the combination oiler and thong case or spare part container.

The initials of the inspector and the year of fabrication are stamped on the left side in the rear of the cut-off thumb piece

recess.

21. Stock screws and nuts.-The stock screws and nuts. front and rear, are identical in form, but slightly different in dimensions.

22. Hand guard.—The hand guard has the swell, for the protection of the rear sight (in which is a groove for sight clearance); the shoulder for the lower band; the shoulder for the upper band; the rear tenon, which enters the undercut in the fixed base; the front tenon, which enters the undercut in the upper band; the clearance, for the windage screw knob; air chamber, and recess for the hand guard clips.

23. Hand guard clips.

24. Barrel assembly.—The barrel assembly includes the barrel, the fixed stud, the fixed stud pin, the fixed base, the fixed base spline, and the fixed base pin.

25. Receiver.-The receiver has the hole, called the well, which receives the bolt; the magazine opening; the channel for the top locking lug; the cut-off seat; the cut-off thumb piece recess; ejector pin hole; clip slots; cocking piece groove; sear noes slot; extracting cam; sear pinhole; gas escape hole; recoil lug, in which is the hole for the front guard screw; the recesses for the bolt locking lugs; the locking cams; the locking shoulders the safety shoulder; and the cartridge ramp.

On the upper surface of the front end is stamped the serial number of the rifle and the place of manufacture.

SECTION III

THE BAYONET, MODEL OF 1905, AND THE BAYONET SCABBARD

26. Bayonet, model of 1905.-The bayonet, model of 1905, consists of

a. The blade, the tang, and the pommel, which are forged in one piece; the front or lower edge is sharp along its entire length and the back for a distance of 5 inches from the point.

The blade is stamped on its left side with the ordnance escutcheon and the initials of the place and year of manufacture, and on the right side with the letters " "U. S." and the serial number.

Immediately in the rear of the guard the tang swells and is recessed to receive the scabbard catch and the bayonet spring. The swell in the tang also serves as a seat for the guard, which is riveted to the blade in manufacture.

The opening in the tang and pommel for the bayonet catch connects with the recess in the swell of the tang and allows the front end of the bayonet catch to enter its seat in the bayonet scabbard catch. The undercut groove receives the stud on the upper band when the bayonet is fixed, the bayonet being held in place by the bayonet catch projecting through the hole.

b. The bayonet guard has the barrel hole, the mortise for the blade, the cut for the bayonet scabbard catch and scabbard mouthpiece hook, and the clearance cut for the scabbard mouthpiece hook. There are also two holes for the bayonet rivets, by means of which the bayonet guard is riveted to the blade.

27. Bayonet scabbard, model of 1905.-The bayonet scabbard, model of 1905, has the wooden body, made in two pieces and glued together; the rawhide cover, which increases the strength of the scabbard; the leather cover; the mouthpiece bushing; the mouthpiece top; the mouthpiece body; riveted to the wooden body by the rivets; the mouthpiece hooks, either of which by its engagement with the hook of the bayonet scabbard catch on the bayonet retains the bayonet in its place in the scabbard; the scabbard hook, attached to the body by the hook rivet, which passes through the inside and outside washers, and the stop washer; the fastener, and the drain eyelet. An offset on the lower end of the hook, traveling in its recess in the stop washer, limits the oscillation of the hook at 50° on each side of the vertical.

28. Bayonet scabbard, model of 1910.-The bayonet scabbard, model of 1910, consists of a wooden body covered with rawhide, over which is sewed a duck cover, or is fitted a woven fabric cover, olive-drab in color. The bayonet is held fast in the scabbard by means of two mouthpiece hooks on opposite sides of the mouthpiece top. The scabbard is fastened to the belt or pack of the soldier by a double-hook, which is attached to the scabbard by the duck hanger sewed to the cover.

SECTION IV

APPENDAGES AND ACCESSORIES

29. Appendages.-Appendages consist of drift slide No. 4 and drift slide No. 6, the oiler and thong case, the thong and thong brush, the spare part container, and the front sight cover.

a. The drift slide No. 4 and drift slide No. 6 are furnished, two of each for every 10 rifles. The 2 drift slides have peepholes respectively 0.04 inch and 0.06 inch in diameter, and have drift slide pins assembled to them.

b. The oiler and thong case, furnished for every rifle, is carried in the butt of the stock. It consists of a sand-blasted brass tube, nickel plated but not polished, about 6 inches long and 4 inch in diameter, divided transversely near the center by a partition. Both ends are closed by screw caps. In one section is carried a small supply of sperm oil, and in the other the thong and thong bush used for cleaning the bore of the rifle. The cap on the oil section is fitted with a wire, flattened at its point, which reaches to the bottom of the section and is

used for applying oil, a drop or more at a time. The oil is only for the lubrication of working parts. The cap is also provided with a leather washer to prevent leakage. The cap on the thong section has a leather pad on its outer surface, which prevents the noise that would result from the oiler striking the butt plate cap. The oiler should always be inserted in the stock so that the leather-tipped cap will be next to the butt plate cap.

c. The thong and thong brush. The thong tip, into which the thong brush is screwed, is provided with a rag slot; the thong cord is knotted in the hole in the tip, and also in the hole in the weight. In cleaning the bore by means of the thong, the brush or rag should always be drawn from the muzzle toward the breech.

d. The spare part container consists of a cylindrical block of wood (hard maple), 5.8 inches long and 0.785 inch in diameter. Slots and recesses are cut for holding three spare parts-a striker, an extractor, and a firing pin. The container may be carried in the butt of the stock, in lieu of the oiler and thong case.

e. The front sight cover is made of sheet steel and pressed into shape. It is then casehardened, giving it sufficient spring to cause it to hug closely the barrel and front sight stud, there by retaining its position on the barrel.

30. Accessories.-Accessories consist of the screw driver, the barrack cleaning rod, model of 1916, and the cleaning rod, model of 1916.

a. The screw driver has the large blade, the small blade, the spur, the pin, and the rivet. The large blade should be used for the large butt plate screw, the butt plate spring screw, and the guard screws; the small blade for all other screws, except the cut-off screw, for which the spur should be used. The pin serves as a drift in removing the butt plate cap, ejector, floor plate catch, sear and trigger pins, and the lower band spring.

b. The barrack cleaning rod, model of 1916, is made of brass rod, 0.25 inch in diameter, and of sufficient length so that the bore can be cleaned from the breech end. It has the knob, the steel collar, and a brass sleeve riveted on the end of the rod. The knob swivels on the rod between the collar and the sleeve. The other end has a socket for connection with the thong brush issued with the rifle. This rod is intended for use in garrison and camp service.