I have a CZ 455 .22lr , I am looking at a Lilja 21" barrel, I shoot mostly suppressed. I talked with Lilja last year about threading a 21" barrel, I was told no on that barrel. Just checking to see if anyone knows a good gunsmith that would thread a Lilja barrel ? I would like to stay with a longer barrel, the ballance for me works perfect. I'm a T-7 para recovering from near fatal bone cancer, my recovery project is dialing my CZ 455 to a nice bench rifle. I know fedderson made a 455 threaded barrel, but stopped production. Thank you for any information! Jay