Bev Fitchett's Guns Magazine

Stock Group Assembly figs SO and

a. Assemble butt plate cap and pin to butt plate. Place butt plate spring on shank of cap, curved side down, and thread in butt plate spring screw (M1903 and M1903A1 Rifles).

b. Place butt plate assembly on butt of stock and thread in butt plate screws. Short screw passes through top tang of butt plate.

c. Place butt swivel assembly in its seat in under side of stock butt, and thread in screws, d. Insert and drive home guard screw bushing in its seat in under side of stock to rear of magazine opening.

e. Insert spindle of lower band spring in hole in right side of stock and drive in with wood block, so that spring seats in its groove in stock.

f. Reinstall barrel and receiver assembly group in stock.

g. Assemble floor plate catch spring and catch to trigger guardp and drive in catch pin. Insert trigger guard in stock and thread in front (short) and rear (long) guard screws (Rifles M1903 and MI903A1).

NOTE: There is no floor plate catch group in trigger guard magazine assembly of the Rifles M1903A3 and M1903A4. This assembly is assembled to the rifle in a similar manner h. For Rifles M1903 and M1903A1, place hand guard assembly on top of barrel, and slide upper and lower bands into place to bind stock and hand guard together. The lower band is stamped with the letter "U," which should face toward the muzzle when band is assembled. The band is tapered to fit hand guard and stock. Reassemble lower band swivel to lower band and stacking swivel to upper band, and thread in upper band screw from right side.

NOTE: In Rifles M1903A3 and M1903A4 the barrel guard and the bayonet stud band correspond to the hand guard and upper band of the Rifles M1903 and M193GA1. The stacking swivel band must be assembled to the stock and barrel guard before the bayonet stud band. (If removed, the barrel guard ring must be assembled to the barrel before the above parts are assembled.)

15, BARREL GROUP, DISASSEMBLY (figs. 51, 52, 53, and 54).

a* Remove front sight pin by driving out from left and remove front sight (fig. 51). Unscrew front sight screw and remove movable stud (Rifles Ml903 and Ml903A!), by tapping out laterally.

ORDNANCE MAINTENANCE - U.S. RIFLES, CAL. .30 Ml903, M1903A1, Ml903A3 AND M1903A4

ORDNANCE MAINTENANCE - U.S. RIFLES, CAL. .30 Ml903, M1903A1, Ml903A3 AND M1903A4

RA PD 84293

A — LEAF - 028572 B —SLIDE - B128418 C—SCREW - B146872 D —PIN-A130008 E —SLIDE ASS Y-B»46893 f — CAP - C45C27 C — SCREW - B146878 H—SPRING - B126424

1 — BASE - C4502G j — PIN - A! 30006 K — FIXED BASE-C45025 L —SCREW 8128415 M —COLLAR - A135891 N — SPRING - BI468S4 O —KNOB-AI 35892 f — RECEIVER - D28371 Q —8ARREL ASSY-C63932

Figure 52 — Rear Sight Group — Exploded View — Parts for U.S. Rifles, cal. .30, Ml903 and Ml903A1

RA PD 84293

A — LEAF - 028572 B —SLIDE - B128418 C—SCREW - B146872 D —PIN-A130008 E —SLIDE ASS Y-B»46893 f — CAP - C45C27 C — SCREW - B146878 H—SPRING - B126424

1 — BASE - C4502G j — PIN - A! 30006 K — FIXED BASE-C45025 L —SCREW 8128415 M —COLLAR - A135891 N — SPRING - BI468S4 O —KNOB-AI 35892 f — RECEIVER - D28371 Q —8ARREL ASSY-C63932

Figure 52 — Rear Sight Group — Exploded View — Parts for U.S. Rifles, cal. .30, Ml903 and Ml903A1

b. The fixed stud should never be removed from the barrel unless necessary. To remove, drive out fixed stud pin and drive fixed stud forward by striking with a hard wood block.

NOTE: The front sight base of the Rifle M1903A3 (fig. 54) corresponds to the fixed stud of the Rifles M1903 and M1903A1, and is keyed to the barreL It may be removed by removing the front sight base pin and driving forward off barrel as in subparagraph 1», above. The key may then be lifted from slot in the barreL

RECEIVER D4407Jr

RING A153072

BAND - B25763I

CLIP - 8128405^

SPRING B1284? 3

BAND - B147724' SWIVEL - A15308Η (^^SCREW A153074

^ SCREW - AI53074 "SWIVEL - A2958I9

RA PD 56362

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£ r figure 53 — Stock, Barrel, and Receiver Oroup — Exploded View — (front and Rear Sight and Butt Plate

Groups Removed) - Parts for US. Rifle, cal. .30, Ml903A3

— SIGHT-A153078

f"

BASE - B147728

PIN - A1 30005

KEY-A) 53045

f"

PIN - A153I10

Figure 54 - Front Sight Group - Exploded View - Parfs for U.S. Rifle, cal. .30, M1903A3

BASE - B147728

PIN - A1 30005

KEY-A) 53045

PIN - A153I10

Figure 54 - Front Sight Group - Exploded View - Parfs for U.S. Rifle, cal. .30, M1903A3

c. To remove the rear sight assembly (Rifles M1903 and M1903A1) from the fixed base and to disassemble (fig. 52), proceed as follows:

(1) Turn windage screw until movable base has revolved far enough to disengage the worm gear on base lip from screw threads on windage screw, and the front and rear lips of movable base are not held by undercuts on the fixed base. Lift movable base off pivot lug on fixed base.

(2) Turn rear sight leaf to forward horizontal position. Place movable base in a vise with a small block of wood bearing on rear sight base spring as near to joint of sight leaf as possible (fig. 55 )> Be sure that no pressure of the vise is exerted on the ears or shoulder of movable base. Tighten vise gently so that block of wood will relieve pressure of spring on rear sight leaf and rear sight joint pin. Push or drive out pin using small pin drift, and remove rear sight leaf.

(3) Take movable base out of vise and drive sight base spring forward out of mortise in base, using a pin drift inserted in hole in spring.

(4) Unscrew rear sight slide cap screw from rear sight slide cap and drive out rear sight slide cap pin, Unscrew and take out rear sight slide binding screw. Drive rear sight slide cap very gently to left out of mortise in rear sight slide. Remove slide and cap from sight leaf and slide rear sight drift slide to top of leaf and out of groove in leaf. The drift slide pin is riveted in place at manufacture and is not to be removed.

(5) To renjove rear sight windage screw from its position in fixed base, compress windage screw spring by forcing screw collar toward windage screw knob to allow as much play as possible, and tap alternately the taper head and the screw knob toward the breech until assembly comes out of seat The windage screw assembly is made a permanent assembly at manufacture by having the end of the pin spun over after the knob has been put on, d. The fixed base (Rifles M1903 and M1903A1) should never be removed from the barrel unless necessary. To remove, drive out fixed base pin and drive fixed base forward by striking with hard wood block, taking care not to damage overhanging lugs. Remove spline.

16. BARREL GROUP, ASSEMBLY (figs. 51, 52, 53, and 54).

a. If fixed base (Rifles Ml903 and M1903A1) has been removed, assemble spline to barrel and drive fixed base on with block of hard wood until pin can be inserted in hole. Drive pin into hole securely. Then assemble rear sight as follows;

(1) To reinstall windage screw, compress windage screw spring as much as possible and slide windage screw into its position in fixed base.

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Figure 55 — Removing Rear Svghr leaf Joint Wn — Ports for U.S. Riffes, cal. .30, Ml903 and Ml 903AI

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Figure 55 — Removing Rear Svghr leaf Joint Wn — Ports for U.S. Riffes, cal. .30, Ml903 and Ml 903AI

(2) Insert drift slide in sight leaf and assemble rear sight slide and cap. Care most be taken to insure that drift slide pin is in groove in slide cap before assembling cap and slide. Be sure to screw in rear sight slide binding screw before inserting slide cap pin. Screw in slide cap screw.

(3) Drive sight base spring into mortise in movable base, and place assembly in vise with block of wood in position as in disassembly (fig. 55). Compress spring just enough to allow sight leaf to be positioned and joint pin inserted. Take assembly out of vise and turn leaf down on movable base.

(4) Place movable base on pivot lug on fixed base and rotate to engage windage screw. In reengaging worm gear on movable base with threads on windage screw, allow them to engage by exerting only a gentle pressure, as undue force may damage threads.

b. If the fixed stud (front sight, Ml903 and M1903A1 Rifles) has been removed, drive it on the barrel over spline, until fixed stud pin can be inserted in hole. Be sure pin and stud are secure»

NOTE: The front sight base of the Rifle M1903A3 is assembled in a similar mariner. The front sight base key must first be seated (pin groove up) in its groove in the muzzle end of the barrel before driving the sight base on- There must be no movement of key when seated If loose, peen in position (par. 46 c).

ORDNANCE MAINTENANCE - U.S. RIFLES, CAL. .30, Ml903/ M1903A1, M1903A3 AND M1903A4

c. Assemble movable stud to fixed stud (M1903 and M1903A1 Rifles) and thread in front sight screw.

d. Assemble front sight (curved edge forward) and drive in front sight pin securely.

NOTE: The front band of the Rifles M1903 and M1903Alf and the stacking swivel band assembly, bayonet stud band, and barrel guard ¡ess ring. Rifle 1903A3, must be placed on the barrel before the front sight group is assembled to the barreL

17. RECEIVER GROUP, DISASSEMBLY (fig. 56).

a. Remove the cut-off by loosening the cut-off screw in the end of the thumb piece until it disengages the groove in the cut-off spindle; insert the blade of a screwdriver in the notch in the rear of the spindle and force it out. Remove the spring and pluunger and cut-off screw. Be careful not to lose the spring and plunger.

b. Remove the ejector by driving out the ejector pin from the upper side.

c. Remove the sear, sear spring, and trigger by driving out the sear pin from the right.

d. Remove the trigger from the sear by driving out the trigger pin from either side.

e. Remove bolt stop assembly by inserting a small punch in the hole in the end of the spring and drawing it from its pocket until pin is free to be pulled out The bolt stop pin and spring are a permanent assembly.

NOTE: Some Rifles M1903 and M1903A1 are without the bolt stop assembly (par. 43 i).

f. To remove the rear sight assembly from the Rifle M1903A3 (fig. 57), proceed as follows:

(1) Turn out the windage index knob screw located in the knurled edge of the knob, far enough to free the knob from the windage yoke screw, and pull knob from yoke screw. (Tighten windage index knob screw to prevent loss.)

(2) Turn out windage yoke screw from sight base, at same time holding remaining parts from springing out.

(3) Lift windage yoke and aperture group out of base, with care not to loose windage yoke plunger and spring located in bottom of yoke, and index knob spring located in right side of sight base. These parts can be pulled out

(4) Loosen the aperture slide screw and pull slide aperture, with screw and slide aperture spring attached, forward out of windage yoke. Spring and screw can be removed from aperture if necessary.

(5) The sight base should not be removed unless necessary. To

RECEIVER - D28371

SCREW -A130017 .

RECEIVER - D28371

SCREW -A130017 .

SEAR-B12841

Figure 56 — Receiver Group — Exploded and Phantom View

SEAR-B12841

Figure 56 — Receiver Group — Exploded and Phantom View

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O	a.	remove, turn out base screw located in top of base, and drive base from receiver, using brass drift or hard wood block. NOTE: Rear sight base screw A153075 has been eliminated in sights of recent manufacture. The sight base is now staked in place. g. To remove the (telescopic sight) mount base from the receiver of the Riñe M1903A4 (fig. 58), proceed as follows: (1) Using a small punch or screwdriver, drive back the staking of front and rear mount base screws sufficiently to clear slot in head of the screws. (2) Turn out screws and lift base from receiver together with mount base shim which may be positioned under front or rear end of mount base. (The shim is used for leveling the base with respect to the bore line of the barrel when assembled at manufacture. It is provided in four thicknesses ranging from 0.005 to 0.020 inch. Its position and thickness should be noted as a guide when assembling. See paragraph 57 for explanation.) 18* RECEIVER GROUP, ASSEMBLY (fig. 56). a. Assemble bolt stop assembly by inserting pin and seat spring in its pocket in receiver (to rear of magazine opening). NOTE: Some Rifles Ml903 and M1903A1 are without the bolt stop assembly (par. 43 i). b. Position trigger and sear and insert trigger pin. c. Place sear spring in position and compress it by pressing on sear until sear pin is inserted in hole. d. Place the ejector in position and drive in the ejector pin. e* Place the spring and plunger in position in the cut-off. Hold cut-off firmly in position while inserting the spindle, as spring and plunger may fly out when spring is compressed. Thread in cut-off screw, making sure that it is screwed in far enough to engage the spindle. L To assemble the rear sight group ot the Riñe M1903A3 (fig* 57), proceed as follows: (1) If sight has been removed, slide it onto dovetailed lug on bridge of receiver, with ears sloping up to rear. Qualify alinement mark on rear of base with that on bridge of receiver and thread in base screw tightly (NOTE, par. 17 f (5)). (2) Place slide aperture spring on top of slide aperture with wide dimension (between screw hole and edge of spring) toward peephole in aperture and long end of spring to left so that protrusion will mate with retaining notches in left side of windage yoke. Insert aperture slide screw and turn in part way. Then insert the slide aperture, so assembled, into the guideways in low end of windage yoke with peep hole end leading. Tighten aperture slide screw. M1903, M1903A1, M1903A3 AND M1903A4 \sicht, telescopic. assembly ) (weaver commercial no. 330c), m73b1 \sicht, telescopic. assembly ) (weaver commercial no. 330c), m73b1 RJNC - BM7822 SCREW A153172 screw-ai 53176 rjnc - b14782i screw - ai53t73 RJNC - BM7822 SCREW A153172 screw-ai 53176 f rjnc - b14782i screw - ai53t73 -ci 13703 SCREW - A153376 -ci 13703 SCREW - A153376 RA PO 84296 Figure 56 — Mount Base and Telescopic Sight M73B1 Group — Exploded View - Parts for U.5- Rifle, cat. .30, Ml903A4 RA PO 84296 Figure 56 — Mount Base and Telescopic Sight M73B1 Group — Exploded View - Parts for U.5- Rifle, cat. .30, Ml903A4 (3) Insert windage yoke plunger and spring (spring first) into seat in bottom of windage yoke. Place assembled yoke between ears of sight base with ears of yoke facing same direction (rear) as those on base. Press down yoke against plunger spring, aline screw hole in yoke and base, and insert windage yoke screw from left side, through base and yoke, and thread all the way through. (4) Place windage index knob spring over grooved end of windage yoke screw, and seating in counterbored recess in right side of sight base, with flat edge down, and bow facing out (5) Place windage index knob on grooved end of windage yoke screw, press in against spring, and turn in index knob (set) screw tightly. Be sure end of knob (set) screw seats in groove in yoke screw before tightening. There should be slight lateral movement of windage yoke screw when index knob is pressed to left against spring action of index knob spring, and then released. (6) Test lateral movement of windage yoke by turning index knob, and test movement of slide aperture by sliding it up and down windage yoke ramp. The windage yoke should move freely the full width of the base, and the slide aperture should move the full length of the yoke ramp and be retained positively and without shake at the graduation notches. If this is not so, it is likely that the slide aperture spring is improperly assembled. g. To assemble the (telescopic sight) mount base to the receiver of the Riñe M1903A4 (fig. 58), proceed as follows: (1) Place mount base shim on top of front (or rear) end of the receiver as when disassembled, so that hole in shim registers with screw hole in receiver, and shim does not overhang receiver NOTE: The mount base of each Rifle M1903A4 is assembled, alined, and leveled at manufacture, and the screws staked in position; therefore, the same shim or one of like thickness (par. 57 a) must be used and placed in the same position when reassembling the base to the rifle in question (par. 57). For assembling a new mount base, refer to paragraph 57. (2) Place mount base on receiver over shim, with curved end forward, and slotted rear end over lug on top of receiver bridge so that screw holes aline. (3) Insert (long) front mount base screw through front end of base and shim (if shim is assembled in front) and thread into receiver (4) Insert (short) rear mount base screw through base and shim (if shim is assembled in rear) and thread into receiver. (5) Turn both screws down evenly and tight, and stake securely in position. (6) Set cross hairs of telescopic sight at zero windage and 100 yards elevation (point blank setting) as explained in TM 9-270, mount sight to base, and bore sight the rifle to check alinement of base as explained in paragraph 54.

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