|Captain Ryan and his troops with a Colt M4 Carbine|
|Owner|| Special Forces|
Leek's Mercenary 1
Leek's Mercenary 2
|Appearances|| Episode 1.2|
The Assault Rifle is a selective fire rifle that uses an intermediate cartridge and a detachable magazine. One type of Assault Rifle is the Sig SG 552.
Sciswell and his two subordinate mercenaries working for Oliver Leek used Heckler & Koch G36Cs in the Silurian desert. They tried to use their weapons on the Silurian Scorpion that attacked them, but to no avail. Sciswell's two subordinates were killed. Sciswell later threatened Nick Cutter, Stephen Hart and Taylor Craig with his gun. He fired into the sand, and this disturbed a Silurian Scorpion, which arose, dragged him under the sand, and devoured him. (Episode 2.5)