The SOP is an incredible extra long range rifle project that a number of people at Snipers Hide have been collaborating on. The huge rifle fires a very long and heavy projectile with a high ballistic coefficient giving it extreme accuracy.
Interior of German coastal artillery casemate, Cherbourg, France, summer 1944. This casemate defended the Cherbourg harbor station and was armed with a Czech-made Skoda 47mm anti tank gun and a MG37 machine gun.Note the solid steel aperture fold. These structures were impervious to all but the heaviest bombardment.