Gauging availability of Scar 20s step down barrels; I need one for my rig as I own a FA762SV-BK which requires the tapered barrel of the earlier SCAR 20s. The new one (that I just put money down on) has a straight heavy barrel profile and I would really like to avoid sending it to be machined. Should have rifle in a couple month, 1:10 twist, surefire pro comp, will literally be a brand new unfired barrel.