Spent the best part of a morning field stripping and re-assembling an L1A1, L85A1, M1A1 Thompson, a pre-production model MP5 (all deactivated) and a few other odds and ends. Best job interview ever.
The SA80 family members I dealt with were actually pretty easy, it was some of the older gear that I had problems with. I mean, the Stirling SMG, an utter PITA. Even the museum tech (who used a Stirling in the 70s) had difficulty with it. Don't get me started on the .303 Vickers...