Yamaha K-31 Service Manual download pdf (Page 80)

132, 133

4. Shooting with a reducer tube

If you fired the weapon with a reducer tube, Please note the following points:

-Upon completion of shooting, remove the reducer tube from the weapon.

-Thoroughly clean the barrel and the chamber. Remove all powder residue or lead.

-A deep cleaning of the chamber is very important. While shooting with a reducer tube, an amount of

residue will be deposited in the chamber. If cleaning is neglected, there is a risk of malfunction (jammed

case).

Reducer tube for Mod. 31

Deformed case.

While shooting with a reducer tube, a hardened ring of

powder residue is formed in the chamber, that will cause

while shooting normal cartridges, case deformation and

jamming.

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Yamaha K-31 Service Manual Page 80