I sure hope you got an ATF tax stamp for $200 before you did that!!!!
Legal length for a rifle barrel in the USA is 16", and that doesn't include a screw-on can!!
OAL must be 26" with a 16" barrel to be legal.
rc
UUUUUUUUH, I believe that that is an illegal length. I'd ditch that barrel and put one on at least 16 incher before the BATFE or FBI comes knocking at your door.