If ridicule are gun, it would look like A198-EK. originally, A198-EK are never be considered to be one of modification variance on A198s family. But since factory are often receive compline about their gun are not powerful enough to kill the car bomb. So the factory create new ammo call 15x50mm "Elephant Killer" (EK). EK ammo are basically the .50 BMG ammo case  cut into 50mm length and narrow the neck down to fit 15mm copper jacketed tungsten, which obviously not gonna fit in standard 5.56 stanag magazine. So there design it to fit on 7.62 NATO magazine instead. similar concept with to .50 beowulf and .458 SOCOM. And so, A198-EK variance are born.

A198-EK still use the same receiver just like other A198s variance. But equip with 15mm barrel and new magazine (because they found out standard AR10 mag cannot feed the big ass ammo reliably) And A198-EK have to change the cycle system from short stroke gas piston into short recoil system, because the presure in 15mm barrel are very high and hard to work with. Since this project are purely made from anger of engineer that keep getting compline on what they can't do. So, they just make barrel ring to support the movement on the barrel. also welded some part to limit the travel.

Of cause, after the test gun are sent to test by someone who always make complain about. the report are as they expected. The recoil are too powerful, it did actually kick one of the tester so hard it dislocated his shoulder. Also the concussion the gun produce are painfully strong. even though, there is no reliably issue on report, which surprise even the engineer who work with the gun a bit since they expect some malfunction when do stress test.

The good and all, A198-EK DID actually been ordered in small quantity. most of them are find itself in hand of station patrol guard, which is the one who often to deal with car bomb regularly. they quite like it somehow. said that before A198-EK are available. they have to use .50 BMG rifle to deal with these problem. and since 15mm EK are lighter than .50cal. they prefer it.