Schmidt's rifle utilized a bolt handle that was attached to an actuating rod in a channel on the right of the receiver with a lug that engaged a helical groove in a bolt sleeve
with dual locking lugs.
To the rear, the bottom of the receiver tang rests against the upper end of the rear action bolt sleeve
The bolt with a Springfield bolt sleeve
, the modified stock and the triggerguard and magazine assembly are from a Model 1917 Enfield
Based on the legendary Mark V action, the Vanguard has a one-piece machined receiver, fully enclosed bolt sleeve
, and three rings of steel surrounding the casehead for an extra measure of strength and structural integrity.
The receiver, bolt sleeve
and floorplate are all engraved.
No bolt sleeve
was provided and the safety was fitted directly into the cocking piece and the bolt cocked halfway upon opening and halfway on closing.
The wing safety on the bolt sleeve
is pushed forward to place the rifle on safe and pulled back to fire.
The bolt sleeve
, sheet metal front barrel band and sheet metal magazine floorplate are phosphate-finished, which indicates manufacture late in 1944 or early 1945.
1904 bolt design is it lacks a bolt sleeve
so the safety is mounted directly on the cocking piece, giving the bolt a neat streamlined appearance.
The one-piece firing pin is spring-loaded and attached at its head to the bolt sleeve
by a crosspin.
The Model 1916's double-lugged bolt cocks on closing and, while the bolt design lacks the larger bolt sleeve
gas shroud of the Model 1898, there is generous gas port cut into the left side of the front receiver ring matching a large gas port in the body of the bolt.
In all cases these safeties share the same basic operation; side-swinging levers located on the right of the bolt sleeve
which, when engaged, positively lock the striker by holding it out of contact with the sear.