I was quite surprised by the changes in rifle and scope tech the US military is using now. It is likely to filter down to the public very soon.
Also, a serious toy
Finnish Soldier in action with a Lahti L-39 20mm semi-automatic anti-tank rifle in 1941The Lahti L-39 was a Finnish semi-automatic 20mm anti-tank rifle used during WW2. Fed from a top mounted 10-ro.