"The post-war arsenal scheme recommended by the Joint Arsenals Planning Board was approved by the
government to incorporate Canadian Arsenals Limited to deal exclusively with small arms (Secretary of
State of Canadaicon, 1958). The machinery and equipment not required by Canadian Arsenals Limited were
transferred to War Assets Corporation for disposal. Canadian Arsenals Limited employed 200 people who
continued to supply arms to the Canadian Army (Weeks, 1990). These included components for the C1
submachine gun, the Browning HP pistol, the Canadian Army standard FN rifle and Bren DMG’s
(Mississauga News, 1970). Additionally they also produced crank shafts and connecting rods for the
Koehler engine for high RPM snowmobiles (Weeks, 1990)."

Heritage Mississauga.

C.A.L. was a separate company from Long Branch and employed 200 vs 5500, turning out over 30,000 units per month.

I get you, but regards lightened design -- which would make sense for air crews -- it wouldn't make sense to go to the expense to mill out a unit if it was a one-off to win a minor gov't bid. If they had a mill on hand, wouldn't they have used it instead of farming out the work?

If it was a surplus bitsa, then there's still the 02 serial, which would indicate the second No4 ever made at Long Branch.