5.56 Small arms ammunition
First Claim
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1. The combination of a gun having a rifled barrel and a round of ammunition;
- the rifling of the barrel comprising rifling grooves which are separated by lands extending helically along the length of the barrel;
the round of ammunition comprising a projectile;
the projectile having a body comprising at substantially cylindrical body comprising a plurality of splines or knurl lines producing a corresponding plurality of grooves which extend along the length of a section of the main diameter of the main body;
a deformable jacket means substantially surrounding a proportion of the diameter of the main body corresponding to the section of said main body comprising said splines or knurl lines;
wherein the body of the projectile is formed from a metal having a Vickers Hardness of not less than 550 HV, and the maximum diameter of said main body comprising said splines or knurl lines being substantially equal to or less than the minimum internal diameter of the weapon barrel.
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Abstract
Described herein is a round of ammunition for firing from a gun having a rifled barrel, especially a small arms weapon. The round comprises a body core (7) which has a plurality of knurl lines (9) and associated grooves (6) formed over a portion of the body core (7). Jacket material (11) is provided over the body core (7) such that the inner diameter (10) of the jacket material (11) makes contact with the knurl lines (9). During firing of the round, the jacket material (11) deforms into the grooves (6) formed between the knurl lines (9) enabling the rifle engraving to take place with a substantially reduced axial force.
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Citations
14 Claims
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1. The combination of a gun having a rifled barrel and a round of ammunition;
- the rifling of the barrel comprising rifling grooves which are separated by lands extending helically along the length of the barrel;
the round of ammunition comprising a projectile;
the projectile having a body comprising at substantially cylindrical body comprising a plurality of splines or knurl lines producing a corresponding plurality of grooves which extend along the length of a section of the main diameter of the main body;
a deformable jacket means substantially surrounding a proportion of the diameter of the main body corresponding to the section of said main body comprising said splines or knurl lines;
wherein the body of the projectile is formed from a metal having a Vickers Hardness of not less than 550 HV, and the maximum diameter of said main body comprising said splines or knurl lines being substantially equal to or less than the minimum internal diameter of the weapon barrel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
- the rifling of the barrel comprising rifling grooves which are separated by lands extending helically along the length of the barrel;
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14. and 15. (Canceled)
Specification