NOT SURE WHERE TO POST THIS!!!!!! 308ar forum newbie here, a coworker just bought a DPMS LR-308 bull( 24" bull barrel). It was technically used but never shot. It belonged to a prepper and was in storage for years('08-'09 era).So the salesman said. When i measured the rail it measures .150. 1). Is this a gen 1 or gen2?... 2). what year did gen 2 start? 3). Does he need to call dpms to find out? He was wanting to make a few changes such as a MLOK rail, adjustable gas block and a magpul stock. !!!!any help will be greatly appreciated!!!! He is on a budget. My thoughts, SLR adjustable block, and Magpul UBR stock. (The PRS magpul is an option) The rail will depend on the gen. thanks in advance