Don't know, but allen bolts is what mine came with. Probably the other bloke's SMG/AR15 & grenades were for emergencies.
So were these "ENVOYS" built on No4(T) actions or actual ENVOYS fitted with pads? In the photo the so-called ENVOY has a flat on the bolt knob and weren't all the ENVOYs built on newish No4 Mk2s with full round bolt knobs?
I'm guessing it's a set of ENVOY wood fitted to a No4(T) action with an RSAF(E) hammer forged barrel.