Greetings, I have a 18.5 inch tapered barrel from a Ruger 10/22. It has the stock front site on it. I am wanting to have it cut and threaded to 1/2 X 28. My quesiton is ... Is there enough barrel thickness beyond the 16.5 inch mark to have it threaded after cutting the front sight off? I am not looking to SBR the rifle.