Just as the title states. Thanks in advance.
@celt I have one of these EFK conversion barrels to make my USPc .40 into 9mm. My sights had to be adjusted but function has been great. I only have 200 rounds through it, but no issues so far.Heckler & Koch USP Compact 40 Barrel by EFK Fire Dragon | eBay
This is not a conversion barrel but I think it's the same manufacture that made my 40-9 usp barrel