No Idea why, but this flametrower was from SPARK arsenal mod, all recomended mods also installed. Also was testing oneshot sniper rifle it working just awesome.

My modelist:
ActiveMods="LongWarOfTheChosen"
ActiveMods="X2WOTCCommunityHighlander"
ActiveMods="ModConfigMenu"
ActiveMods="BetterSecondWaveSupport"
ActiveMods="X2WOTCCommunityPromotionScreen"
ActiveMods="robojumperSquadSelect_WotC"
ActiveMods="WOTCRevertOverwatchRules"
ActiveMods="DLC2CommunityHighlander"
ActiveMods="EvacAll_WotC"
ActiveMods="StopWastingMyTime_WotC"
ActiveMods="StillDontWasteMyTime"
ActiveMods="TrueConcealment"
ActiveMods="TacticalZoomOut"
ActiveMods="UnrestrictedCustomization"
ActiveMods="SECTION9CUSTOMIZATIONPACK1"
ActiveMods="WOTC_Female_Clothing_Pack"
ActiveMods="WOTC_FCP_2"
ActiveMods="WotC_CFHD_FemaleCosmetics"
ActiveMods="FacesOfXcom"
ActiveMods="WOTC_Head_Pack"
ActiveMods="WOTC_Hair_Pack"
ActiveMods="DFHP_WOTC"
ActiveMods="XComInternationalVoicesPack"
ActiveMods="OWVoicesRu"
ActiveMods="FreemansMind"
ActiveMods="BobRoss"
ActiveMods="Arnold"
ActiveMods="CateArcherVoicepack"
ActiveMods="LanaKaneVoicepack"
ActiveMods="CherylTuntVoicepack"
ActiveMods="BloodrayneVoicePack"
ActiveMods="KasumiGotoVoicePack"
ActiveMods="Duke Nukem Voice Pack"
ActiveMods="CalebWOTCVoicePack"
ActiveMods="BulletstormSarranoVoicePack-WTR"
ActiveMods="WOTCL4D1ZoeyVoicePack-WTR"
ActiveMods="WOTCSaintsRow3FemaleBoss1VoicePack-WTR"
ActiveMods="SaintsRow4FemaleBoss3VoicePack-WTR"
ActiveMods="WOTCUnchartedChloeVoicePack-WTR"
ActiveMods="JohnnySilverhandVoicepack"
ActiveMods="WOTCBorderlandsOMDLilithSorceressVoicePack-WTR"
ActiveMods="LaraVoicePack"
ActiveMods="AngellVoice"
ActiveMods="StarWarsVoicePackWOTC"
ActiveMods="FarscapeTheGameVoicePack"
ActiveMods="Vader"
ActiveMods="JacquiVoicepack"
ActiveMods="ArkhamCatwomanVoicepack"
ActiveMods="WOTCPulsefireCaitlyn"
ActiveMods="VoicepackLightningFinalFantasy13"
ActiveMods="WOTCHalf-Life2AlyxVoicePack-WTR"
ActiveMods="AshleyWilliamsVoicePack"
ActiveMods="SaintsRowKinzie"
ActiveMods="CrazyRussianOfficer"
ActiveMods="CapnbubsAccessories-WotC"
ActiveMods="StenchfuryModularArmorsWOTC"
ActiveMods="StenchfuryModularHelmets"
ActiveMods="WotC_DOA_KasumiNinjaOutfits"
ActiveMods="WOTC_Kasumi_Squadmate"
ActiveMods="WOTC_Shepard_Squadmate"
ActiveMods="WOTC_MoreClothes"
ActiveMods="SA2Leona"
ActiveMods="WotC_BlackOps3_Uniforms"
ActiveMods="WOTC_Sci_Fi_Body_Suits"
ActiveMods="[WOTC]SmoothMaleFaces"
ActiveMods="XSkinSystem"
ActiveMods="CatHeadphone"
ActiveMods="S9_MOTOKOPACK"
ActiveMods="EmptyWOTCDecoSlotsforXCOMSoldiers"
ActiveMods="ME3_Miranda"
ActiveMods="MirandaLawsonVoicePack"
ActiveMods="MGS4FrogTrooperOutfit"
ActiveMods="Extra_WeaponSlot_WotC"
ActiveMods="[WOTC]SnakePliskinVP"
ActiveMods="ArmorUtilitySlots"
ActiveMods="DeadpoolVoicepack"
ActiveMods="EvenMoreMaps![WOTC]"
ActiveMods="SlowerAvatarProgression"
ActiveMods="LW_LaserPack_WotC"
ActiveMods="WOTCIridarTemplateMaster"
ActiveMods="WepUpgradeFix"
ActiveMods="WOTCMoreSparkWeapons"
ActiveMods="MechatronicWarfare"
ActiveMods="WOTCFOXCOMLitePsiOverhaul"
ActiveMods="MUltipleCovertActions"
ActiveMods="PlayAsChosen"
ActiveMods="ARFMScavenger"
ActiveMods="WOTC_MoreEngineeringRepairSlots"
ActiveMods="WOTCSystemInfiltration"
ActiveMods="Augmentations"
ActiveMods="OverwatchAllWotC"
ActiveMods="ToughforLwotC"
ActiveMods="TedMECTroopersForLWOTC"
ActiveMods="AbilityEditor"
ActiveMods="PetRockPerkPack"
ActiveMods="ImmolatorChemthrower"
ActiveMods="SlagAndMelta"
ActiveMods="SPARKLaunchersRedux"
ActiveMods="ModJamLWOTC_M2"
ActiveMods="WeaponSkinReplacer"
ActiveMods="NormalizeLoot"
ActiveMods="NelVlesis_Icon_Overrides"
ActiveMods="EverVigilantBugfixesConfigAddOn"
ActiveMods="WOTCStormriderClass"
ActiveMods="WotcSpecOpsClass"
ActiveMods="WotCStealthOverhaul"
ActiveMods="ShadowScopePostProcessFix"
ActiveMods="WotCCombatKnives"
ActiveMods="HijackerClassLWOTC"
ActiveMods="TheDoomSlayer"
ActiveMods="CommandersChoice"
ActiveMods="JediClassRevised"
ActiveMods="PrimarySecondaries"
ActiveMods="DualWieldMelee"
ActiveMods="A2X_AnimationSocketsSupplement"
ActiveMods="WOTCLightsabers"
ActiveMods="RewardDecksRefresher"
ActiveMods="DontUnequipCovertOps"
ActiveMods="Banditry"
ActiveMods="InterrogationAndRecruitment"
ActiveMods="ExtractCorpsesWOTC"
ActiveMods="FTBNonlethalCombat"
ActiveMods="TacticalSuppressors"
ActiveMods="LongWar2AbilitiesforWotC"
ActiveMods="Ketaros2DResources"
ActiveMods="ABBPerkPack"
ActiveMods="WOTCIridarPerkPack"
ActiveMods="MitzrutiPerkPack"
ActiveMods="ShadowOpsPerkPack"
ActiveMods="WOTC_ExtendedPerkPack"
ActiveMods="CryoPerkPack"
ActiveMods="DukeNukemIridar"
ActiveMods="CX_SquadMate_DukeNukem"
ActiveMods="DukeNukemVoice"
ActiveMods="AlliesUnknownEvacZoneFix"
ActiveMods="InvisibleHeads"
ActiveMods="InvisibleHeroUnitsBodyParts"
ActiveMods="KetarosMakeupsPackage"