phm87
Glen,
Rifle 02078C
The rifle you have started life as an M86 not an M87 as it has a clamped foresight.
It was built on the 8/6/1989 by Bill Smallwood who can't remember it specifically but that is not surprising, as he saw hundreds.
I can tell however it was sold to Precision Sports, location UKor USA
not known
It fired 20.5mm with 10 rounds at 100 yards
Gil