Hi Armchair mate..
The Rifle I remember..Airfix made them, an F.N. Rifle (think it was the belgian version of an S.L.R. which Brit soldiers did use in the 1970's..(i fired one a few times in the Air Cadets!) and also a plastic Tommy Gun (i never had one but my mate did!).. they both fired plastic bullets that well hurt if you got shot in the face with one!!! and had removable magazines, slings and wee plastic bayonets too..the F.N. Rifle also had a carry handle..I had several and you got them from Woolworths in our town, around 1975 to 1978 I think...;0)
I also remember the Helicopter game but for the life of me cant remember its name, my pal doug had one and it flew in circles on one end of a 'boom' arm and it was yellow and twin bladed, like a Chinook.. it had a wee black hook and used to pick up toy packing Crates I remember.. think this was made by either matchbox or Airfix..cant remember now..have to investigate further and phone my pal!!!! late 70's early 80's im sure..
all the best...