Butt discs....... In NZ, we were fitting butt marking discs to our newly issued Lithgowicon made L2A1 rifles, issued from the big Ordnance Depot at Ngaruawahia to the Northern based Infantry units in 1968. Why, I never knew - but I just did what was needed. Strangely enough, I asked for one from the NZ Army in 2000 in return for a favour. And it turned up from Papakura, complete with a butt marking disc!