Patent ID: 8245618

Claim:
A barrel jacket ( 1 ) for a firearm, said barrel jacket ( 1 ) being constructed to cover at least partially the outer surface of the bullet-guiding barrel of said firearm, said barrel jacket ( 1 ) comprising: at least one inner casing ( 2 ); an outer casing ( 3 ); and at least one spacer ( 4 ), wherein, the inner casing ( 2 ) is constructed to be arranged adjacent to and cover the barrel; the outer casing ( 3 ) is arranged at a distance to the inner casing ( 2 ), covering said inner casing ( 2 ), wherein a continuous gap ( 5 ) is formed between the inner casing ( 2 ) and the outer casing ( 3 ), and wherein the outer casing ( 3 ) comprises a continuous, hollow body, enclosing the inner casing ( 2 ) completely along an outer surface of the inner casing ( 2 ); and said continuous gap ( 5 ) is stabilised by the at least one spacer ( 4 ), wherein said at least one spacer ( 4 ) stabilizes the inner casing ( 2 ) and outer casing ( 3 ) in their relative positions; wherein said at least one spacer is shaped as a terminating means, and wherein a volume of the continuous gap is confined by the inner casing ( 2 ), the outer casing ( 3 ), and the at least one spacer to seal the continuous gap against dust.