I have a KKM G20 10mm to 40S&W conversion barrel for sale. I sold the G20 so no longer need the barrel.
Excellent condition, matte stainless finish.
$125 shipped PP FF.
These sell for $165 on KKM website:
I have (1) each of the above available for sale. in excellent condition. G21
G21 KKM match grade stainless steel barrel. Bought this as a spare and don't need it. $135 shipped
G20 Lone Wolf 10mm to .357 Sig stainless steel conversion barrel. Bought this new and never installed. $130 shipped