diff --git a/lang/en.json b/lang/en.json
index 8603325..f268d6e 100644
--- a/lang/en.json
+++ b/lang/en.json
@@ -1,5 +1,9 @@
 {
-    "lancer-weapon-fx.Sound Volume": "Sound Volume",
-    "lancer-weapon-fx.Sound Volume Hint": "Set a base volume level for all sound effects. Note that for each user, this value is combined with the user's \"Global: Interface\" volume setting (see the \"Playlists\" sidebar tab) to produce their final volume level.",
-    "lancer-weapon-fx.Debug: Play Miss Animations by Default": "Debug: Play Miss Animations by Default"
+    "lancer-weapon-fx": {
+        "Sound Volume": "Sound Volume",
+        "Sound Volume Hint": "Set a base volume level for all sound effects. Note that for each user, this value is combined with the user's \"Global: Interface\" volume setting (see the \"Playlists\" sidebar tab) to produce their final volume level.",
+        "Use Weapon Heuristic": "Use Weapon Heuristic",
+        "Use Weapon Heuristic Hint": "Use a heuristic to determine a suitable effect to play when using an unknown (homebrew/custom) weapon.",
+        "Debug: Play Miss Animations by Default": "Debug: Play Miss Animations by Default"
+    }
 }
diff --git a/scripts/effectResolver/weaponEffects.js b/scripts/effectResolver/weaponEffects.js
index 8040223..4f49cdb 100644
--- a/scripts/effectResolver/weaponEffects.js
+++ b/scripts/effectResolver/weaponEffects.js
@@ -199,6 +199,20 @@ const weaponEffects = {
     "npc_Tempest_NaniteMonsoonDispensers": "Nexus",
     "npc_Tempest_TyphoonNaniteCannon": "Nexus",
     "npc_PDCTurret": "Leviathan",
+    //HEURISTICS
+    "lwfx_heuristic_melee": "DefaultMelee",
+    "lwfx_heuristic_cqb_energy": "PPC",
+    "lwfx_heuristic_cqb_shotgun": "Shotgun",
+    "lwfx_heuristic_cqb_other": "Pistol",
+    "lwfx_heuristic_cannon_energy": "Tachyon Lance",
+    "lwfx_heuristic_cannon_mg": "HMG",
+    "lwfx_heuristic_cannon_other": "Mortar",
+    "lwfx_heuristic_launcher": "Missile",
+    "lwfx_heuristic_nexus": "Nexus",
+    "lwfx_heuristic_rifle_energy": "Thermal Rifle",
+    "lwfx_heuristic_rifle_mg": "HMG",
+    "lwfx_heuristic_rifle_ar": "Assault Rifle",
+    "lwfx_heuristic_rifle_other": "AMR",
 };
 
 export { weaponEffects };
diff --git a/scripts/flow/WeaponAttackFlow/heuristic.js b/scripts/flow/WeaponAttackFlow/heuristic.js
new file mode 100644
index 0000000..e1d7ea8
--- /dev/null
+++ b/scripts/flow/WeaponAttackFlow/heuristic.js
@@ -0,0 +1,68 @@
+import { MODULE_ID } from "../../consts.js";
+import { SETTING_IS_WEAPON_HEURISTIC_ACTIVE } from "../../settings.js";
+
+const getPrimaryDamageType = ({ activeProfile }) => {
+    return activeProfile.all_damage?.[0]?.type;
+};
+
+const getPrimaryRange = ({ activeProfile }) => {
+    return activeProfile.all_range?.[0]?.type;
+};
+
+const isShotgun = ({ name, activeProfile }) => {
+    if (getPrimaryRange({ activeProfile }) === "Cone") return true;
+    return /\bshotgun\b/i.test(name);
+};
+
+const isMachineGun = ({ name }) => {
+    return /\b(?:assault|lmg|hmg|machine gun|minigun)\b/i.test(name);
+};
+
+export const fallbackActionIdentifier = flow => {
+    if (!game.settings.get(MODULE_ID, SETTING_IS_WEAPON_HEURISTIC_ACTIVE)) return null;
+
+    const activeProfile = flow.state.item?.system?.active_profile;
+    if (!activeProfile) return null;
+
+    const {
+        name,
+        system: { size },
+    } = flow.state.item;
+
+    switch (flow.state.item.system.active_profile.type) {
+        case "Melee": {
+            return "lwfx_heuristic_melee";
+        }
+
+        case "CQB": {
+            if (getPrimaryDamageType({ activeProfile }) === "Energy") return "lwfx_heuristic_cqb_energy";
+            if (isShotgun({ name, activeProfile })) return "lwfx_heuristic_cqb_shotgun";
+            return "lwfx_heuristic_cqb_other";
+        }
+
+        case "Rifle": {
+            if (getPrimaryDamageType({ activeProfile }) === "Energy") return "lwfx_heuristic_rifle_energy";
+            if (isMachineGun({ name })) {
+                if (["Heavy", "Superheavy"].includes(size)) return "lwfx_heuristic_rifle_mg";
+                return "lwfx_heuristic_rifle_ar";
+            }
+            return "lwfx_heuristic_rifle_other";
+        }
+
+        case "Launcher": {
+            return "lwfx_heuristic_launcher";
+        }
+
+        case "Cannon": {
+            if (getPrimaryDamageType({ activeProfile }) === "Energy") return "lwfx_heuristic_cannon_energy";
+            if (isMachineGun({ name })) return "lwfx_heuristic_cannon_mg";
+            return "lwfx_heuristic_cannon_other";
+        }
+
+        case "Nexus": {
+            return "lwfx_heuristic_nexus";
+        }
+    }
+
+    return null;
+};
diff --git a/scripts/flow/flowListener.js b/scripts/flow/flowListener.js
index e3a9682..56c59ad 100644
--- a/scripts/flow/flowListener.js
+++ b/scripts/flow/flowListener.js
@@ -1,5 +1,6 @@
 import { FlowInfo, getTokenByIdOrActorId, processFlowInfo } from "./common.js";
 import { pGetMacroUuid } from "../effectResolver/effectResolver.js";
+import { fallbackActionIdentifier as fallbackActionIdentifier_WeaponAttackFlow } from "./WeaponAttackFlow/heuristic.js";
 
 /**
  * @param state
@@ -108,7 +109,10 @@ const _onReady = () => {
     if (!foundry.utils.isNewerVersion(game.version, "11")) return;
 
     // Weapon attacks
-    _bindFlowHook({ flowName: "WeaponAttackFlow" });
+    _bindFlowHook({
+        flowName: "WeaponAttackFlow",
+        fallbackActionIdentifier: fallbackActionIdentifier_WeaponAttackFlow,
+    });
     // Basic attacks
     _bindFlowHook({ flowName: "BasicAttackFlow", fallbackActionIdentifier: fallbackActionIdentifier_BasicAttackFlow });
 
diff --git a/scripts/settings.js b/scripts/settings.js
index 35065d7..475d31a 100644
--- a/scripts/settings.js
+++ b/scripts/settings.js
@@ -1,6 +1,7 @@
 import { MODULE_ID } from "./consts.js";
 
 export const SETTING_VOLUME = "volume";
+export const SETTING_IS_WEAPON_HEURISTIC_ACTIVE = "isWeaponHeuristicActive";
 
 export const SETTING_DEBUG_IS_DEFAULT_MISS = "debug-is-default-miss";
 
@@ -17,6 +18,15 @@ export const bindHooks = () => {
             default: 1.0,
         });
 
+        game.settings.register(MODULE_ID, SETTING_IS_WEAPON_HEURISTIC_ACTIVE, {
+            name: "lancer-weapon-fx.Use Weapon Heuristic",
+            hint: "lancer-weapon-fx.Use Weapon Heuristic Hint",
+            scope: "world",
+            config: true,
+            type: Boolean,
+            default: true,
+        });
+
         game.settings.register(MODULE_ID, SETTING_DEBUG_IS_DEFAULT_MISS, {
             name: "lancer-weapon-fx.Debug: Play Miss Animations by Default",
             scope: "client",