|Haswell Gen3 Decimator|
|Weapon in Just Cause X: Global eXchange|
While impressingly heavy (it weights almost 7 kgs), this battle rifle is the best of its kind (at least in 2020) in terms of firepower and precision. It shreds body armor and flash alike, and is only inferior to "advanced" types of weapons (such as rail-guns and plasma casters).
While originally developed in the 90s, it was too heavy for normal soldiers to handle, neither was it reliable. With the advancements in combat exoskeleton technology, Decimators finally entered service in late 2016. They are used by elite forces around the world, such as US Marines and the Black Hand.
It's easily a best chemical-based kinetic rifle in JCX, which means it outguns weapons of its class, but also has much more common ammunition then more powerful plasma rifles (which is rather rare in higher difficulties). This battle rifle is very precise as well. The only setback is a relatively low range of fire (but it's still fully automatic)