SGW Gunsmith
Member
During the production run of the Ruger Mark II stainless steel versions, specifically the KMK10, KMK678 Target and the KMK512 Target, for some reason Ruger shipped some versions with a two-piece bolt. You can tell if your pistol has the two-piece bolt very easily:
You can see the obvious seam between the bolt head and the bolt body, as opposed to the solid one-piece bolts.
Ruger gets between 3 and 6 Mark II bolts back each year that have complete head/body separations, and if they get any Mark II that has a two-piece bolt back for any reason, they automatically replace the two-piece bolt:
Once separated, they can not be fixed easily. Ruger has no Mark II bolts left in stock for replacement, so they send Ruger Mark IV bolts instead. I find that most all Ruger Mark II owners want to keep their Mark II pistols as original. Send me a PM ( personal message ) and we can discuss at least one solution involved with keeping your pistol original.
You can see the obvious seam between the bolt head and the bolt body, as opposed to the solid one-piece bolts.
Ruger gets between 3 and 6 Mark II bolts back each year that have complete head/body separations, and if they get any Mark II that has a two-piece bolt back for any reason, they automatically replace the two-piece bolt:
Once separated, they can not be fixed easily. Ruger has no Mark II bolts left in stock for replacement, so they send Ruger Mark IV bolts instead. I find that most all Ruger Mark II owners want to keep their Mark II pistols as original. Send me a PM ( personal message ) and we can discuss at least one solution involved with keeping your pistol original.
