Noveske 308 rifles are built on Armalite pattern lowers and steel magazines. I have a Noveske N6 upper on an Armalite 308 lower. Armalite has recently redesigned their 308 lower to the new AR-10A configuration which is designed to accept PMAGs. The older steel magazine design is now designated the AR-10B. This design change resulted in some geometric changes so the old Armalite and Noveske N6 uppers will not fit the new AR-10A lower. Supposedly, since Armalite changed their lower design to accept PMAGs, and Noveske 308 rifles are historically designed for Armalite style lowers, Noveske is changing as well. I assume they will continue to use the Armalite pattern and go with the AR-10A design but this is just an assumption, I have no hard facts on that. All the information about the new AR-10A lower can be found at
ArmaLite Inc.