Hammer Release

Figure 38—Continued.


19. Stoppages a. Definition. A stoppage is an unintentional interruption of the cycle of operation. The stoppage may be caused by improper functioning of the rifle or faulty ammunition. h. Types of Stoppages.

Hi Misfire. A misfire is a failure to fire. A misfire itself is not dangerous, but since it cannot be immediately distinguished from a delay in the functioning of the firing mechanism, it should be considered as a possible delay in firing until this possibility has been eliminated. A delay in the functioning of the firing mechanism could result from the presence of foreign matter such as sand, grit, oil and grease. These might create a partial mechanical restraint which, after some delay, is overcome by continued force applied by the spring, and the firing pin then strikes the primer. No round should be left in a hot weapon any longer than necessary because of the possibility of a cookoff.

(2) Cookoff. Cookoff is the functioning of a chambered round of ammunition initiated by the heat of the weapon. If the primer or propelling charge should cookoff, the projectile will be propelled from the weapon with normal Velocity even though no attempt was made to fire the primer by actuating the firing mechanism. One hundred and fifty rounds fired in a 2-minute interval will heat the barrel enough to produce a cookoff.

c. Common Stoppages. The rifle will function efficiently if it is properly maintained. The firer must watch for defects and correct them before they ctute a stoppage. Some of the more common stoppages, their usual causes and remedies, are shown in chart 2.

Chart 2. Stoppage: Thair Cau#u and Rem «dim

Stoppage F si hire to feed

Failure to chamber Failure to lock Failure to fire

Failure to unlock

Failure to extract

Failure to eject . Failure to cock .

Cause Remedy

Defective or worn parte Replace parte.

Dirty or dented magazine Clean or replace magazine.

Looee gar cylinder plug Tighten plug.

Lack of lubrication of operating paru Glean and lubricate parte.

Dirty chamber Clean chamber.

Defective ammunition Replace ammunition.

Lack o! lubrication of operating parte Clean and lubricate parta.

Dirty locking receeees Clean recesses.

Weak operating rod spring Replace spring.

Defective ammunition Replace ammunition.

Broken firing pin Replace firing pin.

Defective or broken parts in firing mechanism Replace parts or entire firing mechanism.

Bolt not fully locked See Failure to lock.

Dirty chamber Clean chamber.

Lack of lubrication of operating part» Clean and lubricate parte.

Insufficient gae Tighten gas cylinder plug and check spindle valve.

Spindle valve cloeed Open valve.

Dirty chamber Clean chamber.

Dirty ammunition R«*>lace ammunition.

Broken extractor Replace extractor.

Broken ejector or weak ejector spring Replace faulty part

Defective or broken parts in firing mechanism Replace parts or entire firing mechanism.

20. Immediate Action

Immediate action is the unhesitating application of a probable remedy to reduce a stoppage without investigating the cause. Immediate action is taught in two phases.

а. The first phase is taught as a drill so that the rifleman learns to perform it quickly and in* stinctively without thought as to the cause of the stoppage. To apply the first phase: with the right hand, palm up, pull the operating rod handle all the way to the rear. Release it, aim and attempt to fire. The palm is up to avoid injury to the hand in event of a cookoff (fig 39).

б. If the first phase of immediate action fails to reduce a stoppage, the second phase of immediate action is applied. The five key words to remember in the second phase are: TAKE, PULL, LOOK, LOCATE, and REDUCE.

(1) TAKE the rifle from the shoulder.

421 PULL the operating rod handle slowly to the rear.

(3) LOOK in the receiver.

(4) LOCATE the stoppage by observing, as the operating rod handle is pulled to the rear, what is in the chamber, and what has been ejected.

151 REDUCE the stoppage and continue to fire.

The Rifle Action PicsRifle Marksmanship
Figure 39. Applying immediate action.

r. \1 ¡afire« will rarely occur- Normally, the firer will instinctively apply immediate action which in most instances reduces the stoppage even when caused by a hangfire or misfire. The normal cause of a misfire is faulty ammunition. Therefore, further use of ammunition from that lot should be suspended and reported to ordnance for disposition.


21. General

Maintenance includes all measures taken to keep the rifle in operating condition. This includes normal cleaning, inspection for defective parts, repair and lubrication.

22. Cleaning Materials, Lubricants, and Kquip-ment a. Cleaning Materials. I ll Bore cleaner (cleaning compound solvent [CRl is used primarily for cleaning the bore; however, it can be used on all metal parts for a temporary (1 day) protection from rust.

(2) Hot, soapy water or plain hot water is no substitute for bore cleaner and will only be used % bore cleaner is not available.

(3 I Dry cleaning solvent (SD) is used for cleaning rifles which are coated with grease, oil, or corrosion-preventive components.

(41 Carbon removing compound (P-C-l I I-A) is used on stubborn carbon deposits by soaking and brushing. This process must be followed by the use of dry cleaning solvent. b. I.ubricants.

Ill Lubricating oil, general purpose (PL special!, is used to lubricate the rifle at normal temperture.

(21 Lubricating oil, weapons (LAW I, is used for low temperatures (below 0°).

(31 OE 10 engine oil may be used as a field expedient under combat conditions when the oils prescribed in ( I I and (2) above cannot be obtained. However, as soon as possible the weapon should be cleaned and lubricated with the proper, authorized lubricants.

141 Rifle grease should be applied to those working surfaces shown in figure 40.

(If A complete set of maintenance equipment (fig 4 I I is stored in the stork of the M I 4 rifle.

12) The combination tool can be used as either a 20 decree offset screwdriver or as a pas plug wrench <figs 42 and 431.

ivi^ The handle of the combination tool is also used as the cleaning rod handle. Allow the cleaning rod extension of the tool to fall from the tool handle so that it hangs perpendicular. Assemble the four sections of the cleaning rod and screw them into the threaded hole in the cleaning rod extension. Kither the bore brush or the cleaning patch holder may be attached to the end of the cleaning rod.

(M Thr plastic lubricant case Ifig 441 is closed with a screw cap which has a stem (applicator! attached at one end that is used to apply oil drop by drop. The cap is fitted with a gasket to prevent oil leakage. The other end has another screw cap with applicator and contains rifle grease.

2.1. Cleaning the Rifle

I'roctulitrcs for (llenning hum her nnd Bore. The rifle must be cleaned after it has been fired because firing leaves primer fouling, powder ashes, carbon, and metal fouling. The ammunition has a noncorrosivc primer which makes cleaning easier, but not less important. The primer still leaves a deposit that may collect moisture and promote rust if it is not removed.

I I l Immediately after firing, thoroughly clean the bore with a bore brush saturated with CR. solvent cleaning compound.

I 2 I After cleaning with CR. the bore should be swabbed with flannel cleaning patches making certain no trace of burned powder or other foreign substances are left. Then apply a light coat of PL special, general purpose lubricating oil.

131 The chamber should be cleaned with a cleaning brush, using the following procedures:

M14 Chamber BrushM14 Silhouettes
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