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M4 Sand Test with FailZero Bolt carrier group

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Uploaded on Nov 8, 2009

No lube on the UCT coating's excellent FailZero carrier kit.
Colt LE6940CK upper kit on Registered Class 3 lower
2x TangoDown Magazines loaded with 28rds of LC M855 each.

NOTICE....The sand was tossed on the rifle with the ejection port facing upwards and the dust cover open!
second mag are fired with sand tossed on top of the open dust cover closed bolt condition.

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