First, with SparkIV, export your WEAPONS.ivaud from resident.rpf (find it in
pc\audio\Sfx). Open the WEAPONS.ivaud with GTA IV-aud and import all sound files
to here (match the names):

AK47_SHOT2_A_L
AK47_SHOT2_B_L
AK47_SHOT2_C_L
AK47_SHOT2_D_L
AK47_SHOT2_E_L
AK47_SHOT1_L
AK47_SHOT1_R

Save once done and import back to resident.rpf, Save and close.

Now install this WeaponInfo to AK47 line:

	<weapon type="AK47">
		<data slot="RIFLE" firetype="INSTANT_HIT" damagetype="BULLET" group="RIFLE_ASSAULT" targetrange="50.0" weaponrange="640" clipsize="25" ammomax="300" timebetweenshots="66">
			<damage base="51.5" networkplayermod="2.5" networkpedmod="1.25"/>
			<physics force="75.0"/>
			<reload time="2066" fasttime="1166" crouchtime="2066"/>

			<aiming accuracy="0.75">
				<offset x="0.14" y="1.0" z="0.55"/>
				<crouchedoffset x="0.08" y="1.0" z="0.12"/>
				<reticule standing="0.6" ducked="0.5" scale="0.3"/>
			</aiming>

			<pickup regentime="300000" ammoonstreet="45"/>

			<controller>
				<rumble duration="200" intensity="0.55"/>
			</controller>

			<flags>
				<flag>GUN</flag>
				<flag>CAN_AIM</flag>
				<flag>2HANDED</flag>
				<flag>ANIM_RELOAD</flag>
				<flag>CAN_FREE_AIM</flag>
				<flag>ANIM_CROUCH_FIRE</flag>
				<flag>SILENCED</flag>
			</flags>
		</data>

		<assets model="w_ak47">
			<anim group="gun@ak47">
				<rates firerate="2.58" blindfirerate="2.58"/>
			</anim>
			<effects>
				<muzzle fx="muz_machine"/>
				<shell fx="weap_ejected_rifle"/>
			</effects>
		</assets>
	</weapon>