This Marlin manufactured breech bolt assembly with blue finished body having a handle ball with serrated radius is for the model 15YN bolt action rimfire rifle and is in very good condition with light wear. This style bolt may require the synthetic feed throat to install. (file photo)

Note: Marlin model 15YN rimfire rifles with the following years of manufacture and serial numbers have been observed with this part: 10660993, 10661264 & 10661311