So here is my first (and possibly the first on Mocpages) full sized Corner Shot
About this creation
The Corner Shot is a weapon accessory invented by Lt. Col. Amos Golan of the Israeli Defense Forces in cooperation with American investors. It was designed in the early 2000s for SWAT teams and special forces in hostile situations usually involving terrorists and hostages. Its purpose is similar to that of the periscope rifle; it allows its operator to both see and attack an armed target, without exposing the operator to counterattack.
And here is the pistol mounted on the front of the gun, the Walther P99. Credit to The Dawg for the P99 handle.