Broad arrow is the symbol of War Department property.
The large circular stamp is the 'trademark' of the Enfield Arsenal where the gun was made.
The elongated 'asterisk' is the two opposing War Department/Government Property broad arrows, showing that the piece was sold out of service to a civilian organisation of some kind.
DC in a lozenge is the 'Dominion of Canada' stamp, indicating crown ownership and service in Canada.
34 may be the unit number [?]
Are there any other numbers on the butt plate?
Perhaps Mr Rombaugh can put me right here.
tac