Pattern 1907 bayonet fitted to SMLE rifle. The combined length of the SMLE and Pattern 1907 bayonet was 5 feet 2 inches (1.57 m). The Pattern 1907 bayonet attached to the SMLE by a boss located below the barrel on the nose of the rifle and a mortise groove on the pommel of the bayonet. The Pattern 1907 bayonet was supplied with a simple leather scabbard flitted with a steel top-mount and chape, and usually carried from the belt by a simple frog. Original hooked quillion of the Pattern 1907 bayonet. A shallow fuller was machined into both sides of the blade, 12 inches (300 mm) long and extending to within 3 inches (76 mm) of the tip, with variations due to the judgement of individual machinists. The Pattern 1907 bayonet's blade was 17 inches (430 mm) long. Often unit armourers subsequently removed the hooked quillion when the bayonet was sent for repair, although there is no evidence that this was officially directed. This was later deemed impractical and replaced with a simpler design from 1913. Originally the bayonet featured a hooked lower quillion intended for trapping an enemy's bayonet and possibly disarming opponents when grappling. The entire bayonet was 21 3⁄ 4 inches (550 mm) long and weighed 16 1⁄ 2 ounces (470 g), although the weight of production models varied from 16 to 18 ounces (450 to 510 g).

The Pattern 1907 bayonet consisted of a one-piece steel blade and tang, with a crossguard and pommel made from wrought iron or mild steel, and a wooden grip usually of walnut secured to the tang by two screws.

M1917 bayonet markings