Originally Posted by irishbum
EFK is crap,to be avoided at all cost. I ordered a SL for my 19 they gave me 4 different dates promising it would be done & shipped. Great barrel we did just not see eye to eye on service. They did send me a $2 knife with their name on it and a couple $.25 targets for my troubles. Even though I told them where they could shove those items and I didn't want them. Really is a great barrel though.
I agree on the EFK barrels, but the OP wanted to know who makes barrels. I had one for my USP compact and could never get it to run 100% on it. But almost all my guns are running some sort of threaded barrel now a days... Mostly factory though.