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AR-7 'Apocalypse'

The success of the AP-6 has allowed the engineers of the rebelion to create a modification of MP5K - SMG-R, named "Apocalypse". The AR-7 is used by soldiers as a nickname, but the weapon's model itself was originally named SMG-R. The weapon allows you to shoot on the move, moving at high speed, but the long recharge time is compensated by additional firepower from the AP-6. The weapon is convenient for use in cities and forests at medium distances.

LMB - full-automatic gunfire
RMB - aiming

See HL2 weapon remakes.