Patent ID: 7987624

Claim:
In the combination of a firearm and ammunition therefor, the improvement comprising: an ammunition round including a subcaliber projectile attached to the front end of a sabot, said projectile being separable from said sabot; at least one barrel for said firearm; said sabot having a cross-sectional area which substantially entirely fills the cross-sectional area of said barrel; said barrel having lands adjacent its discharge end for effecting a sealing relationship with said sabot when said sabot together with its attached projectile are fired to thereby seal off said discharge end in a gas-proof manner; a collar extending into the interior of said barrel at said discharge end to partially obturate said discharge end, said collar blocking said sabot upon the firing of a round but permitting the egress of said projectile; and a gas permeable plate normally blocking said barrel at its discharge end, said plate being so positioned as to be penetrated by said projectile only after said sabot has been blocked by said collar.