I used your MP5 ADS CS GO version and it works great. Reload animation slow happens all the time with this mod though, and can confirm it's due to some mod script stuff. When I go to default settings (or my mod order is changed)	, animation works right. But my script doesn't change reload stuff other than reload time. I even tried setting it back to default 2.2667 seconds and still doesn't fix it (ignore "file" : "vgui/hud/mp7" , I have a custom mp7 folder that has a Bizon HUD icon, I'm strange I know)

[spoiler]
WeaponData
{
	// Terror-specific Data -------------------- Bizon
	"VerticalPunch"			"2.8"
	"SpreadPerShot"			"0.4"
	"MaxSpread"				"30"
	"SpreadDecay"			"4"
	"MinDuckingSpread"		"0.5"	//0.3
	"MinStandingSpread"		"1.2"	//0.7
	"MinInAirSpread"		"30"
	"MaxMovementSpread"		"2.7"
	"AddonAttachment"		"primary"
	"Team"					"Survivor"
	"ReloadDuration" 	"2.2667"

	"Tier"					"1"		// valid entries are 0, 1, 2

	"ResponseRulesName"		"SMG"

	// particle muzzle flash effect to play when fired
	"MuzzleFlashEffect_1stPerson"		"weapon_muzzle_flash_smg_FP"
	"MuzzleFlashEffect_3rdPerson"		"weapon_muzzle_flash_smg"

	// model for the shell casing to eject when we fire bullets
	"EjectBrassEffect"		"weapon_shell_casing_9mm"

	// Used in the music system when this weapon fires
	"MusicDynamicSpeed"		"0.3"

	"DisplayName"			"#L4D_Weapon_SMG"
	"DisplayNameAllCaps"	"#L4D_Weapon_SMG_CAPS"

	// 360 Terror Data
	"MaxAutoAimDeflection1"			"10.0"
	"MaxAutoAimRange1"				"0"
	//This value determins how "big" a target is for auto aim. If a target is 10.0 units big then it is considered 10.0*scale.
	//You can think about this value controlling a falloff value on distant targets, the smaller the value the harder it is to hit at a distance.
	"WeaponAutoAimScale"			"1.0"
	// End Terror-specific Data ----------------

	"Rumble"			"3"

	"MaxPlayerSpeed"		"250"
	"WeaponType"			"smg"
	"WeaponPrice"			"1500"
	"WeaponArmorRatio"		"1.0"
	"CrosshairMinDistance"		"6"
	"CrosshairDeltaDistance"	"2"
	"BuiltRightHanded"		"1"
	"PlayerAnimationExtension"	"mp5"
	"MuzzleFlashScale"		"1.1"


	"CanEquipWithShield"		"0"


	// Weapon characteristics:
	"PenetrationNumLayers"		"2"
	"PenetrationPower"			"30"
	"PenetrationMaxDistance"	"540"	// none

	"Damage"			"14"
	"Range"				"4000"
	"RangeModifier"			"0.937"
	"Bullets"			"1"
	"CycleTime"			"0.057"

	"TimeToIdle"			"2"
	"IdleInterval"			"20"

	// Weapon data is loaded by both the Game and Client DLLs.
	"printname"			"SMG"
	"playermodel"			"models/w_models/weapons/w_smg_uzi.mdl"

	"viewmodel"			"models/v_models/v_smg.mdl"
	"CharacterViewmodelAddon"
	{
		"Coach"				"models/weapons/arms/v_arms_coach_new.mdl"
		"Mechanic"			"models/weapons/arms/v_arms_mechanic_new.mdl"
		"Producer"			"models/weapons/arms/v_arms_producer_new.mdl"
		"Gambler"			"models/weapons/arms/v_arms_gambler_new.mdl"

		"Manager"			"models/weapons/arms/v_arms_louis.mdl"
		"Biker"				"models/weapons/arms/v_arms_francis.mdl"
	 	"TeenGirl"			"models/weapons/arms/v_arms_zoey.mdl"
		"NamVet"			"models/weapons/arms/v_arms_bill.mdl"
	}

	"anim_prefix"			"anim"
	"bucket"			"0"
	"bucket_position"		"0"

	"clip_size"			"30"

	"primary_ammo"			"AMMO_TYPE_SMG"
	"secondary_ammo"		"None"

	"weight"			"25"
	"item_flags"			"0"

	// Sounds for the weapon. There is a max of 16 sounds per category (i.e. max 16 "single_shot" sounds)
	SoundData
	{
		"single_shot"		"SMG.Fire"
		"shoot_incendiary"	"SMG.FireIncendiary"
	}

	// Weapon Sprite data is loaded by the Client DLL.
	TextureData
	{
		"weapon"
		{
				"file"		"vgui/hud/mp7"
				"x"			"0"
				"y"			"0"
				"width"		"256"
				"height"	"64"
		}
		"ammo"
		{
				"file"		"vgui/hud/9mm"
				"x"			"0" //"384"
				"y"			"0" //"448"
				"width"		"64"
				"height"	"64"
		}
		"crosshair"
		{
				"file"		"sprites/crosshairs"
				"x"			"0"
				"y"			"48"
				"width"		"24"
				"height"	"24"
		}
		"autoaim"
		{
				"file"		"sprites/crosshairs"
				"x"			"0"
				"y"			"48"
				"width"		"24"
				"height"	"24"
		}
	}
	ModelBounds
	{
		Viewmodel
		{
			Mins	"-10 -4 -13"
			Maxs	"21 9 -1"
		}
		World
		{
			Mins	"-10 -7 -6"
			Maxs	"22 8 9"
		}
	}
}