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Photo Friday: AR Kaboom

arboom

June 3, 2016 by The Arms Guide Leave a Comment

During a Firearms Instructor Development Course there was an ammunition malfunction which resulted in a destroyed rifle. The officer was conducting barricade work, shooting steel at about 65 yards, using his personally owned rifle, a Rock River M4.

The investigation showed this was caused by a telescoping round. This occurs when the actual bullet is not crimped properly to the casing. When it is fed from the magazine by the bolt assembly it telescopes backwards into the casing, causing a huge increase in pressure.

I encourage everyone to regularly inspect the ammunition in the duty magazines. If you load and unload, make sure that you aren’t using the same round over and over.


This shooter was not injured because of proper use of safety equipment Glasses and hearing protection.

A good emergency plan with a medical kit couldn’t hurt.

Featured Photo courtesy of Amoryblog.com.

Cracked Barrel extension

Bolt

Broken Bolt Carrier

Upper Reciever blown up

Bolt facce

Expanded Bolt Carrier

Ejection Port

Mag well view

Filed Under: Firearms Training, Rifles Tagged With: AR, bad ammunition, explosion, kaboom, over pressure

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