| 摘要 |
<p>An open framework receiver automatic cannon comprises a cannon barrel and a breech ring mounting the barrel and through opposite sides of which intermediate regions of first and second elongate rigid tubular support members are received, with longitudinal axes thereof parallel to, equally spaced to sides of, and coplanar with, a barrel bore axis. Forward and rearward ends of the support members are respectively interconnected by a barrel support and a detachable recoil buffer which includes a bolt sear. Reciprocating movement of a bolt and a bolt carrier assembly is guided by longitudinal slots in the support members and plate mounted between the buffer and breech ring. Disposed in the support members are means for driving the bolt assembly forwardly on unsearing; apparatus for causing recoil of the bolt carrier after firing to enable bolt unlocking and inertia means for reducing bolt carrier bounce from the breech ring on forward impact. A barrel gas manifold provides pressurized gas to operate the bolt carrier recoil apparatus and a gas operated shell feeder. Mounted around the support members are cannon mounting cylinders housing a large number of cannon recoil springs.</p> |
