Bev Fitchett's Guns Magazine

Cutoff At Off Position

Figur« 22 - Safety at "SAFi" and Cut-off at "Off w

SAFETY AT READY RIFLE COCKED

Figur« 22 - Safety at "SAFi" and Cut-off at "Off

IA PD 10155

CUT-OFF AT ON POSITION

IA PD 10155

figure 23 - Safety at "READY" and Cut-off at "ON"

bolt completes the compression of the mainspring, seats the cartridge in the chamber, and in single loading forces the hook of the extractor into the groove of the cartridge case.

(c) In loading from the magazine, the hook of the extractor, cocking piece firing pin rod cocking piece firing pin rod

cocking cam surface / sear notch

RA PD 10859

cocking cam surface / sear notch

RA PD 10859

figure 24 — firing Pin Assembly receive cartridge fixed base figure 24 — firing Pin Assembly receive cartridge fixed base

bolt locking lugs locking shoulders barrel cartridge ramp bolt locking lugs locking shoulders barrel cartridge ramp

RA PD 10847

Figvre 25 — Camming System A — Section Through Forward End of Receiver and Rear End of Barrel — Vertical View rounded at its lower edge, engages in the extracting groove of the top cartridge as it rises from the magazine under the action of the follower and magazine spring (fig. 29). The cartridge can not come out of magazine well until pushed forward by the bolt. This prevents double feeding. The position occupied by the bolt and cartridge is shown in figures 14 and 15.

(4) Camming System. It will be noted that in this type of bolt mechanism, the compression of the mainspring, the seating of the car-

LOCKING PIECE SEAR NOTCH

COCKING PIECE LUC

LOCKING SHOULDER SAFErr LOCK CAM

RECEIVER COCKINGr PIECE GROOVE f

FETV SPINDLE NOTCH BOLT EXTRACTING CAM

BOLT COCKING CAM CLJP SEAT

LOCKING PIECE SEAR NOTCH

COCKING PIECE LUC

LOCKING SHOULDER SAFErr LOCK CAM

RECEIVER COCKINGr PIECE GROOVE f

TP. IGGEft HEEL TRIGGER BtARlvC

RA to 1MW

Figure 26 - Camming System B — Section Through Rear End of Receiver — Vertical View

TP. IGGEft HEEL TRIGGER BtARlvC

RA to 1MW

Figure 26 - Camming System B — Section Through Rear End of Receiver — Vertical View ejector

BOLT SLIDE

cartridge ramp ejector

BOLT SLIDE

cartridge ramp

SEAR NOSE \ MAGAZINE WELL CAS VENT

cocking pjece groove safety lug shoulder m n iomj figure 27 — Receiver — Bolt and Magazine Mechanism

Removed — Top View tridge in the chamber, and the starting of the empty case from the chamber are entirely done by the action of earns.

c. Magazine Mechanism.

(1) Description. The magazine mechanism for the M1903 and M1903A1 Rifles, consists of the floor plate, follower, and magazine spring. The components are shown in figure 47. The functioning of the magazine mechanism is controlled by the position of the cut-off on the receiver (figs. 22 and 23), which limits the movement of the

EXTRACTOR CA

EXTRACTOR CA

U PD 1UM

Location of Extractor Com

U PD 1UM

Location of Extractor Com

Figure 29 — Corf ridge Being Pushed Into Chamber by Bolt

Figure 29 — Corf ridge Being Pushed Into Chamber by Bolt bolt (figs. 31 and 32), The floor plate supports the magazine spring which forces the follower upward. When feeding cartridges from the magazine (fig, 29), the follower raises the cartridges in the magazine so that the tap cartridge projects through the magazine opening in the receiver far enough to be caught by the bolt on its forward movement.

(2 ) Charging Magazine, With cut-off turned up showing "ON " and the bolt drawn fully to the rear, cartridges are inserted from a

Figure 30 — Extractor Holding Cartridge Head and Cartridge

Being Extracted From Chamber clip or from the hand, and the bolt closed When charging the magazine from a clip, either end of a loaded clip is placed in its seat in the receiver and the cartridges pressed down into the magazine with the thumb until the top cartridge is caught by the right edge of the receiver. Pushing the bolt forward after charging the magazine ejects the clip* The cartridge ramp (fig, 27) guides the bullet and cartridge case into the chamber- The magazine can be filled, if partly filled, by inserting cartridges one by one. {This latter type of loading is necessary for the Rifle M1903A4 with telescopic sight mounted.)

(3) Cut-off at "OFF." When the cut-off is turned down, the magazine is "OFF/1 The bolt cannot be drawn fully back, and its front end, projecting over the rear end of the upper cartridge, holds it down in the magazine below the action of "pie bolt (fig. 31). The magazine mechanism then remains inoperative, and the rifle can be used as a single-loader, the cartridges in the magazine being held in reserve. The rifle can readily be used as a single-loader with the magazine empty.

(4) Cut-off at "ON" When the cut-off is turned up, the magazine is wON/' The bolt can be drawn fully to the rear, permitting the top cartridge to rise high enough to be caught by the bolt in its forward movement (fig. 32). As the bolt is closed, this cartridge is pushed forward into the chamber (fig. 29), being held up during its passage by the pressure of those below. The last one in the magazine is held up by the follower, the rib of which directs it into the chamber.

(5) Action of Follower. In magazine fire, after the last cartridge has been fired and the bolt drawn fully to the rear, the follower

M PD 10M7

M PD 10M7

Figure 31 — Cartridges in Magazine — Cut-off at "OFF

Figure 31 — Cartridges in Magazine — Cut-off at "OFF

M PD IOWA

Figure 32 - Cartridges rn Magazine — Cut-off of "ON"

M PD IOWA

Figure 32 - Cartridges rn Magazine — Cut-off of "ON"

INTRODUCTION

ejector

follower

RA PD 10B6B

bolt

Figure 33 — Position of Follower — Magazine Empty —

Cut-off at "ON"

follower

RA PD 10B6B

bolt

Figure 33 — Position of Follower — Magazine Empty —

Cut-off at "ON"

rises and holds the bolt open to show that the magazine is empty (fig. 33).

d. Cocking the Rifle. The rifle may be cocked either by raising the bolt handle until it strikes the left side of the receiver and then immediately turning it down, or by pulling the cocking piece (fig. 15) directly to the rear until the sear notch on the cocking piece has passed the sear nose.

e. Firing the Rifle. The rifle is fired by drawing the finger piece of the trigger to the rear until contact with the receiver is transferred from the normal bearing surface to the heel (fig. 26), which takes up the slack. The action of the trigger is then continued until the sear nose is withdrawn from in front of the cocking piece or sear notch. In firing, unless the bolt handle is turned fully down, the cam on the cocking piece will strike the cocking cam on the bolt, and the energy of the mainspring will be expended in closing the bolt instead of on the primer through the medium of the striker. This prevents the possibility of a cartridge being fired before the bolt is fully closed

Section II

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