The Machine Gun

be directed to the fundamental problems which arise from the very fact that the chambers are separate from the remainder of the barrel. In the following paragraphs, these problems are discussed in some length from the general point of view, first to outline the broad principles involved in weapons having the chambers separate from the barrel and types of ammunition are not included in the scope of this publication.)

The essential elements of a gun having the explosion chambers separate from the barrel are shown schematically in fig. 4-4. The explosion chamber has its bore shaped to receive and fit the cartridge and is of sufficient strength to withstand the dis-

Figure 4-3. Mechanism of "Bicycle Chain" Gun.

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