| 摘要 |
An extendable butt stock includes a housing having a forward end, an open rearward end, an opening at the forward end and a buffer tube of a firearm received therethrough. A hinge plate pivotally attaches a butt plate to the rearward end of the housing, movable between an open position and a closed position. A spine reinforcing member having a rearward end and a forward end extends from the rearward end of the housing to proximate the forward end of the housing and cradles the buffer tube. The butt plate contacts the rearward end of the spine reinforcing member when the butt plate is in the closed position. An engagement mechanism is carried by the housing and releasably attaches the buffer tube to the spine reinforcing member.
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