Cotter pin anti rotation mechanism for accommodating sub caliber ammunition utilized in an AR-15 type firearm
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United States of America Patent
Stats
-
Nov 27, 2012
Grant Date -
Oct 20, 2011
app pub date -
Apr 1, 2011
filing date -
Apr 15, 2010
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An anti-rotation feature incorporated between a cotter pin and a sub caliber action device installable within an upper receiver of a firearm. A receiver plate exhibits a notched interior for seating a bolt in reciprocating fashion. A chamfer formed in a side of the bolt intersects a length extending channel of the bolt for seating within the notched interior. The chamfer seating a head of the cotter pin to prevent rotation during bolt travel. A rearward support sleeve seats an opposing guide rod associated with the receiver plate and in order to maintain the bolt assembly. A firing pin exhibits a notch at a location along its shaft and, upon installation within an interior aperture of the bolt, is retained in position by the cotter pin. The firing pin is configured so as to exhibit a reduced diameter end projection upon which is supported a coil spring.
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