Remington 491 - Manual (Page 18)

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Tool Disassembly
2. Using thumb, push stop towards rear of tool and remove (see Figure 2).
Figure 2 - Removing Stop
Stop
Figure 3 - Separating Base Plate From Piston Sleeve
Piston Sleeve
Base Plate
3. Pull barrel assembly out of liner in tool body.
4. Remove shear clip from barrel assembly (see item 20, page 17, for shear clip
location).
5. Separate base plate from piston sleeve (see Figure 3).
REMOVING BARREL ASSEMBLY
1. Using screwdriver, lift end of annular spring and rotate spring until stop is
uncovered (see Figure 1).
Annular Spring
Figure 1 - Rotating Annular Spring
WARNING: Never disassemble, replace barrel, clean, or assemble a loaded
powder actuated tool.
Stop