Mossberg 590 - Manual (Page 13)

11
Assemble the elevator by squeezing the arms together sufficiently to position them in the
receiver so that the buttons on the elevator fit into the corresponding (1/4” [6.4 mm]) diameter
holes in the receiver (Fig. 11).
Pivot the elevator so that the forward portion of the elevator is even with the outside edge of the
cavity in the receiver.
Insert the rear of the bolt assembly, with its bolt lock downwards toward the front inside top of the
receiver, into the barrel opening of the receiver. Depress the ejector (located in the side of
the receiver opposite the ejection port) to allow the bolt assembly to slide fully rearward into the
receiver.
The ejector must fit into the corresponding slot in the bolt (Fig. 11).
Push the elevator down until it rests against the bolt. Position the rear of the bolt assembly even
with the rear of the clearance cuts in the sides of the receiver (Fig. 13-B).
Trigger housing cleaning
Brush loose residue from trigger housing with a soft bristle brush. Never use a brush with metal
bristles, as this could remove the protective coating on the trigger housing.
never pull the trigger while the trigger housing is removed from the receiver, as
damage to the trigger housing and/or personal injury may result.
assemBly of inTernal receiver componenTs
Place the receiver with the trigger housing opening upward on a clean surface.
Check to be certain that the safety button on the top rear of the receiver is fully rearward in the
“ON” (SAFE) position (Fig. 2). Slide the forearm assembly onto the magazine tube while guiding
the action slide bars into the corresponding cuts in the front of the receiver (Fig. 12).
Be sure not to leave cleaning patches or excessive oil or grease in the bore as they can
create dangerous obstructions. Obstructions of any kind can cause damage to the
firearm and may result in serious personal injury to the shooter and/or others nearby.
acTion cleaning
Clean all components of the action including the bolt, bolt slide and action slide bars (Figure 11)
to remove accumulated residue. An evaporating solvent should be used. Action parts will
remain cleaner longer if lubrication is used sparingly.
receiver cleaning
Clean the inside of receiver with a rag or soft brush, giving special attention to the tracks which
guide the bolt and bolt slide. Place a few drops of light oil in these tracks when clean. Care
should be taken when cleaning the exterior surfaces of the receiver to prevent cosmetic
damage. Never use a brush with metal bristles, as this could remove the protective coating on
the receiver.