Enfield L85 A1
5.56x45mm NATO
This bullpup design was created in the 1970s and in 1987 became the standard issue service rifle for the British Armed Forces, denoted as SA80 (Small Arms for the 80s).
After the Gulf War in which the A1 model displayed a high rate of failure, they were improved as the A2 which are currently in service today
The A1s were factory equipped with SUSAT sights and the later A2s were equipped with a rail system for greater versatility.