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Old October 7, 2007, 02:24 AM   #16
TNFrank
Senior Member
 
Join Date: September 22, 2007
Location: Crossville, TN., U.S.A.
Posts: 490
Once again, we must define terms. Very few if any modern semi auto pistols "jam", which is when the pistol action locks shut and can not be opened without taking the gun apart. Now if by "jam" you actually mean a failure to feed, or a failure to extract or a stovepipe then we're talking something totally different.

I. Stoppage - Anything that interrupts the firing cycle.

A. Failure to feed - When Round fails to chamber completely.

1. Magazine not seated completely

2. Bad ammunition

3. Damaged magazine - magazine follower, spring, lips, body

4. Dirty weapon - insufficient lubrication

B. Failure to Fire - The trigger is pressed, the firing mechanism functions but the weapon does not fire.

1. No round in chamber

2. Bad round in chamber

3. Slide out of battery

4. Damaged Weapon

a. Firing Pin

b. Hammer Spring

C. Fail to Extract - The weapon fires, but the case stays in the chamber.

(AKA Double Feed)

1. Debris under extractor (maintenance)

2. Bad Ammunition (case rim)

3. Broken extractor

D. Fail to Eject - The weapon fires but the fired cartridge case is caught between the bolt fact of the slide and the chamber portion of the barrel.

1. Shooter Induced

a. Limp wrist

b. Arms not locked


2. Bad Ammunition

a. No power to operate slide

3. Broken extractor

4. Dirty Weapon - insufficient lubrication



STOPPAGE CLASSIFICATIONS

I. Phase I Non mechanical stoppages that can be quickly cleared: No round in chamber, bad round, magazine not seated, stovepipe.

A. Failure to feed

B. Failure to fire

C. Failure to eject

II. Phase II Non Mechanical stoppages that can be cleared but require more time. Double feed/two failures to fire.

A. Failure to extract

III. Phase III Mechanical failures that require a departmental armorer to correct.

A. Breakage

B. Wear

Daily inspection and periodic firing and cleaning will help avert having a Phase III stoppage at an inopportune time
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