| Boys Anti-tank Rifle | |
|---|---|
 Boys anti-tank rifle Mk I | |
| Type | Anti-tank rifle |
| Place of origin |  United Kingdom |
| Service history | |
| In service | 1937 - 1943 |
| Used by | See Users |
| Wars | World War II |
| Production history | |
| Designed | 1937 |
| Manufacturer | Royal Small Arms Factory |
| Produced | 1937 - |
| No. built | ~62,000 |
| Variants | Mk I, Mk II |
| Specifications | |
| Mass | 36 pounds (16 kg)[1] |
| Length | 5 feet 5 inches (1.65 m)[1] |
| Barrel length | 3 feet 6 inches (1.07 m)[1] |
| Cartridge | Kynoch & RG .55 Boys (13.9x99mmB) |
| Calibre | 0.55 inches (14 mm) |
| Action | Bolt |
| Rate of fire | ~10 round/min |
| Muzzle velocity | 990 metres (1,080 yd) per second |
| Effective firing range | Could penetrate 21 millimetres (0.83 in) of armour at 330 yards (300 m).[1] |
| Feed system | Five-round detachable box magazine |
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The Rifle, Anti-Tank, .55in, Boys commonly known as the "Boys (or, often and incorrectly,"Boyes") Anti-tank Rifle" was a British anti-tank rifle.