SP101 barrel conversion

Bimmerland

Bearcat
Joined
Aug 10, 2025
Messages
3
City & State/Province
North Carolina
Interested in the 9mm SP101 but with a twist. Would like to replace the 2.2 inch barrel with a 4.2 inch barrel for range work. Has anyone tried this?
Alternate idea would be a SP101 in 357 but swap out cylinder to accommodate 9mm.

Any suggestions greatly appreciated. Thanks
 
A barrel swap would likely be the easiest if you can find a barrel. But as Mobuck said, labor could get pricey.
 
Thanks. Let me know this evening
Finally got around to checking this and realized my 9mm SP is an early short cylinder model. Maybe someone with a current production 9mm could tell you the cylinder length. The two cylinders were the same diameter and the 9mm cylinder length was the same as the other short cylinder SP I have.
 

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