These are a recreation of the USMC M40 Sniper rifle adopted in Vietnam. We call this the M40B the B stands for base. While it retains the look and feel of the M40 we have modified a few aspects to bring the cost down. These rifles do not have clip slotting (not needed for the mount) and are not glass bedded, neither were the originals. Also some of the trigger components and bottom metal are newer versions to bring down cost. They are a great shooting rifle and representation of the M40. These rifles are guaranteed to shoot 1 MOA or better. This was the standard that was expected from the original M40.