Right side view of 25mm M811 autocannon. Note the shell ejection tube below the barrel.
Source: www.mkeusa.com -
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The M811 is the primary armament of the VCI infantry fighting vehicle variant of the VBCI platform.
The American Bushmaster I is also an externally powered autocannon in 25x137mm NATO.
The Swiss Oerlikon KBA is the origin of the 25x137mm NATO round. This is a gas operated weapon with higher cyclic rate of fire.
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