PzB-41 and HK SL-9SD Sniper Rifle

At over 2 meters long, this is one of the largest  shoulder arms ever manufactured.  It is based on an aircraft cannon that was designed for ground strafing in 1918, and was a distant kin to the Lahti m/39.  The mechanism is however far more complex than the Lahti, involving winding a crank and then cocking the weapon. Recoil was brutal, but  the range is very satisfying.  They were tested on the Russian Front, where they were quickly discarded as antiarmor PzB-41 weapons because their effectiveness vs. the T-34s that were becoming so common was nil.  The Italian Army used a number of them, but  almost exclusively as sniping and antimaterial weapons.

 HK SL-9SD Sniper Rifle

 HK SL-9SD Sniper Rifle

H&K SL-9SD SniperRifle

This Heckler and Koch-made suppressed sniper rifle is based on the civilian SL-8 rifle (itself  a version of the G-36, redesigned to comply with the 1994 Brady Crime Bill in the US).  Heckler and Koch decided to design new ammunition from scratch instead of attempting to use a silencer with bullet  wipes to slow the bullet, since this leads to rapid wear of the silencer. The cartridge is a hollowpoint  7.62x37mm subsonic round, and the weapon is redesigned for this larger-caliber round. Noise from this rifle is Class III noise as defined in Merc: 2000.  The SL-9SD SniperRifle has an adjustable stock, adjustable cheekpiece, and adjustable trigger.  By 2002, the SL-9SD was still considered a developmental weapon, and distribution was in very small numbers, ostensibly for combat testing only.