FIELD: armaments, in particular barrel systems. SUBSTANCE: the barrel having the barrel and breech ends is separated in such a way that at least one end is made extensible relative to the breech end in the muzzle direction. The extensible ends are provided with members of their extension from the own source of energy of body propelling or from an external energy source. EFFECT: enhanced projectile range. 15 cl, 12 dwg
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