Starkster

My name is Jim, I building a .308 and waiting for the buffer kit and the lower will be finished. It's a P-TAC TAC10 gen 1 from the looks of it and I'm at a loss what to do for an upper. PSA doesn't build gen 1 .308 uppers any more so I'm seeking help. It didn't take very long for me to run into trouble. They say a gen 2 will fit but the receiver doesnt exactly match the lower on the mag catch side of the mag well. If anybody can point me in the right direction I would appreciate it, thanks.