diff --git a/mods/aircrafts.js b/mods/aircrafts.js
new file mode 100644
index 00000000..df5bb794
--- /dev/null
+++ b/mods/aircrafts.js
@@ -0,0 +1,225 @@
+//aircrafts
+elements.fast_bullet_left = {
+    color: "#4c4e42",
+    behavior: [
+        "XX|DL|XX",
+        "XX|XX|XX",
+        "XX|DL|XX",
+    ],
+tick: function(pixel) {
+        for (var i=0; i<3; i++) {
+            if (!tryMove(pixel, pixel.x-3, pixel.y)) {
+                if (!isEmpty(pixel.x-3, pixel.y,true)) {
+                    var newPixel = pixelMap[pixel.x-3][pixel.y];
+                    if (newPixel.element === "fast_bullet_left") { break; }
+                    if (elements[newPixel.element].state == "solid") {
+                        if (Math.random() > (elements[newPixel.element].hardness || 0)) {
+                            if (elements[newPixel.element].breakInto) {
+                                breakPixel(newPixel);
+                            }
+                            else {
+                                deletePixel(newPixel.x, newPixel.y);
+                            }}}}
+                deletePixel(pixel.x,pixel.y);
+                break;
+            }}},
+    category: "ammunition",
+    state: "solid",
+    insulate: true,
+},
+elements.fast_bullet_right = {
+    color: "#4c4e42",
+    behavior: [
+        "XX|DL|XX",
+        "XX|XX|XX",
+        "XX|DL|XX",
+    ],
+    tick: function(pixel) {
+        for (var i=0; i<3; i++) {
+            if (!tryMove(pixel, pixel.x+3, pixel.y)) {
+                if (!isEmpty(pixel.x+3, pixel.y,true)) {
+                    var newPixel = pixelMap[pixel.x+3][pixel.y];
+                    if (newPixel.element === "fast_bullet_right") { break; }
+                    if (elements[newPixel.element].state == "solid") {
+                        if (Math.random() > (elements[newPixel.element].hardness || 0)) {
+                            if (elements[newPixel.element].breakInto) {
+                                breakPixel(newPixel);
+                            }
+                            else {
+                                deletePixel(newPixel.x, newPixel.y);
+                            }}}}
+                deletePixel(pixel.x,pixel.y);
+                break;
+            }}},
+    category: "ammunition",
+    state: "solid",
+    insulate: true,
+},
+elements.flak_cannon = {
+    color: "#C0C0C0",
+    behavior: behaviors.WALL,
+    behaviorOn: [
+        "XX|CR:flak|XX",
+        "XX|XX|XX",
+        "XX|XX|XX",
+    ],
+    category: "weapons",
+    state: "solid",
+    density: 1300,
+    conduct: 1,
+},
+    elements.flak = {
+    color: "#f0f0f0",
+    tick: function(pixel) {
+        if ((pixel.temp > 10 || pixel.charge) && !pixel.burning) {
+            pixel.burning = true;
+            pixel.burnStart = pixelTicks;
+        }
+        if (pixel.burning) {
+            if (!tryMove(pixel, pixel.x, pixel.y-1)) {
+                // tryMove again to the top left or top right
+                tryMove(pixel, pixel.x+(Math.random() < 0.5 ? -1 : 1), pixel.y-1);
+            }
+            if (pixelTicks-pixel.burnStart > 50 && Math.random() < 0.005) {
+                explodeAt(pixel.x, pixel.y, 10, "flak_shrapnel");
+            }
+        }
+        else {
+            if (!tryMove(pixel, pixel.x, pixel.y+1)) {
+                // tryMove again to the bottom left or bottom right
+                tryMove(pixel, pixel.x+(Math.random() < 0.5 ? -1 : 1), pixel.y+1);
+            }
+        }
+        doDefaults(pixel);
+    },
+    burn: 90,
+    burnTime: 100,
+    density: 2000,
+    conduct: 1,
+    state: "solid",
+    category: "ammunition"
+},
+    elements.flak_shrapnel = {
+    color: "#71797E",
+       behavior: [
+        "XX|XX|XX",
+        "XX|EX:5 %10|XX",
+        "M2|M1|M2",
+    ],
+    burn: 90,
+    burnTime: 100,
+    density: 2000,
+    conduct: 1,
+    state: "solid",
+    category: "ammunition"
+},
+elements.fighter_jet_left = {
+    color: "#bcc6cc",
+    behavior: [
+        "M1%0.2|M2%0.005 AND EX:5>metal_scrap|M2%0.005 AND EX:5>metal_scrap",
+        "M1 AND CR:fast_bullet_left|XX|CR:smoke AND EX:5>metal_scrap",
+        "M1%0.2|M2%0.005 AND EX:5>metal_scrap|M2%0.005 AND EX:5>metal_scrap",
+    ],
+tick: function(pixel) {
+    for (var i=0; i<2; i++) {
+            if (!tryMove(pixel, pixel.x-1, pixel.y)) {
+                if (!isEmpty(pixel.x-1, pixel.y,true)) {
+                    var newPixel = pixelMap[pixel.x-1][pixel.y];
+                    if (newPixel.element === "fast_bullet_left") { break; }
+                    if (elements[newPixel.element].state == "solid") {
+                        if (Math.random() > (elements[newPixel.element].hardness || 0)) {
+                            if (elements[newPixel.element].breakInto) {
+                                breakPixel(newPixel);
+                            }
+                            else {
+                                deletePixel(newPixel.x, newPixel.y);
+                            }}}}
+                deletePixel(pixel.x,pixel.y);
+                break;
+            }}},
+    category: "aircrafts",
+    breakInto: "metal_scrap"
+ },
+elements.fighter_jet_right = {
+    color: "#bcc6cc",
+    behavior: [
+        "M2%0.005 AND EX:5>metal_scrap|M2%0.005 AND EX:5>metal_scrap|M1%0.2",
+        "CR:smoke AND EX:5>metal_scrap|XX|M1 AND CR:fast_bullet_right",
+        "M2%0.005 AND EX:5>metal_scrap|M2%0.005 AND EX:5>metal_scrap|M1%0.2",
+    ],
+tick: function(pixel) {
+    for (var i=0; i<2; i++) {
+            if (!tryMove(pixel, pixel.x+1, pixel.y)) {
+                if (!isEmpty(pixel.x+1, pixel.y,true)) {
+                    var newPixel = pixelMap[pixel.x+1][pixel.y];
+                    if (newPixel.element === "fast_bullet_right") { break; }
+                    if (elements[newPixel.element].state == "solid") {
+                        if (Math.random() > (elements[newPixel.element].hardness || 0)) {
+                            if (elements[newPixel.element].breakInto) {
+                                breakPixel(newPixel);
+                            }
+                            else {
+                                deletePixel(newPixel.x, newPixel.y);
+                            }}}}
+                deletePixel(pixel.x,pixel.y);
+                break;
+            }}},
+    category: "aircrafts",
+    breakInto: "metal_scrap"
+ },
+elements.airliner_left = {
+    color: "#fafafa",
+    category: "aircrafts",
+    behavior: [
+        "M1%3 AND EX:7>fire,fire,fire,metal_scrap|XX|XX",
+        "M1 AND EX:7>fire,fire,fire,metal_scrap|XX|XX",
+        "M1%3 AND EX:7>fire,fire,fire,metal_scrap|XX|CR:smoke%10",
+    ],
+    burnTime: 1000,
+    burn: 40,
+    burnInto: "metal_scrap",
+    breakInto: "metal_scrap",
+    conduct: 1
+},
+elements.airliner_right = {
+    color: "#fafafa",
+    category: "aircrafts",
+    behavior: [
+        "XX|XX|M1%3 AND EX:7>fire,fire,fire,metal_scrap",
+        "XX|XX|M1 AND EX:7>fire,fire,fire,metal_scrap",
+        "CR:smoke%10|XX|M1%3 AND EX:7>fire,fire,fire,metal_scrap",
+    ],
+    burnTime: 1000,
+    burn: 40,
+    burnInto: "metal_scrap",
+    breakInto: "metal_scrap",
+    conduct: 1
+},
+elements.bomber_left = {
+    color: "#fafafa",
+    category: "aircrafts",
+    behavior: [
+        "M1%3 AND EX:7>fire,fire,fire,metal_scrap|XX|XX",
+        "M1 AND EX:7>fire,fire,fire,metal_scrap|XX|XX",
+        "M1%3 AND EX:7>fire,fire,fire,metal_scrap|XX|CR:smoke%10 AND CR:bomb",
+    ],
+    burnTime: 1000,
+    burn: 40,
+    burnInto: "metal_scrap",
+    breakInto: "metal_scrap",
+    conduct: 1
+},
+elements.bomber_right = {
+    color: "#fafafa",
+    category: "aircrafts",
+    behavior: [
+        "XX|XX|M1%3 AND EX:7>fire,fire,fire,metal_scrap",
+        "XX|XX|M1 AND EX:7>fire,fire,fire,metal_scrap",
+        "CR:smoke%10 AND CR:bomb|XX|M1%3 AND EX:7>fire,fire,fire,metal_scrap",
+    ],
+    burnTime: 1000,
+    burn: 40,
+    burnInto: "metal_scrap",
+    breakInto: "metal_scrap",
+    conduct: 1
+}
\ No newline at end of file
diff --git a/mods/weapons.js b/mods/weapons.js
index 99831ad9..3eef74c2 100644
--- a/mods/weapons.js
+++ b/mods/weapons.js
@@ -345,11 +345,11 @@ elements.gaster_blast_right = {
 elements.fast_bullet_left = {
     color: "#4c4e42",
     behavior: [
-        "DL|DL|XX",
-        "DL|XX|XX",
-        "DL|DL|XX",
+        "XX|DL|XX",
+        "XX|XX|XX",
+        "XX|DL|XX",
     ],
-    tick: function(pixel) {
+tick: function(pixel) {
         for (var i=0; i<3; i++) {
             if (!tryMove(pixel, pixel.x-3, pixel.y)) {
                 if (!isEmpty(pixel.x-3, pixel.y,true)) {
@@ -373,9 +373,9 @@ elements.fast_bullet_left = {
 elements.fast_bullet_right = {
     color: "#4c4e42",
     behavior: [
-        "XX|DL|DL",
-        "XX|XX|DL",
-        "XX|DL|DL",
+        "XX|DL|XX",
+        "XX|XX|XX",
+        "XX|DL|XX",
     ],
     tick: function(pixel) {
         for (var i=0; i<3; i++) {
@@ -414,7 +414,7 @@ elements.flak_cannon = {
     elements.flak = {
     color: "#f0f0f0",
     tick: function(pixel) {
-        if ((pixel.temp > 1000 || pixel.charge) && !pixel.burning) {
+        if ((pixel.temp > 10 || pixel.charge) && !pixel.burning) {
             pixel.burning = true;
             pixel.burnStart = pixelTicks;
         }
@@ -455,4 +455,58 @@ elements.flak_cannon = {
     conduct: 1,
     state: "solid",
     category: "ammunition"
-}
\ No newline at end of file
+},
+elements.fighter_jet_left = {
+    color: "#bcc6cc",
+    behavior: [
+        "M1%0.2|M2%0.005 AND EX:5>metal_scrap|M2%0.005 AND EX:5>metal_scrap",
+        "M1 AND CR:fast_bullet_left|XX|CR:smoke AND EX:5>metal_scrap",
+        "M1%0.2|M2%0.005 AND EX:5>metal_scrap|M2%0.005 AND EX:5>metal_scrap",
+    ],
+tick: function(pixel) {
+    for (var i=0; i<2; i++) {
+            if (!tryMove(pixel, pixel.x-1, pixel.y)) {
+                if (!isEmpty(pixel.x-1, pixel.y,true)) {
+                    var newPixel = pixelMap[pixel.x-1][pixel.y];
+                    if (newPixel.element === "fast_bullet_left") { break; }
+                    if (elements[newPixel.element].state == "solid") {
+                        if (Math.random() > (elements[newPixel.element].hardness || 0)) {
+                            if (elements[newPixel.element].breakInto) {
+                                breakPixel(newPixel);
+                            }
+                            else {
+                                deletePixel(newPixel.x, newPixel.y);
+                            }}}}
+                deletePixel(pixel.x,pixel.y);
+                break;
+            }}},
+    category: "aircrafts",
+    breakInto: "metal_scrap"
+ },
+elements.fighter_jet_right = {
+    color: "#bcc6cc",
+    behavior: [
+        "M2%0.005 AND EX:5>metal_scrap|M2%0.005 AND EX:5>metal_scrap|M1%0.2",
+        "CR:smoke AND EX:5>metal_scrap|XX|M1 AND CR:fast_bullet_right",
+        "M2%0.005 AND EX:5>metal_scrap|M2%0.005 AND EX:5>metal_scrap|M1%0.2",
+    ],
+tick: function(pixel) {
+    for (var i=0; i<2; i++) {
+            if (!tryMove(pixel, pixel.x+1, pixel.y)) {
+                if (!isEmpty(pixel.x+1, pixel.y,true)) {
+                    var newPixel = pixelMap[pixel.x+1][pixel.y];
+                    if (newPixel.element === "fast_bullet_right") { break; }
+                    if (elements[newPixel.element].state == "solid") {
+                        if (Math.random() > (elements[newPixel.element].hardness || 0)) {
+                            if (elements[newPixel.element].breakInto) {
+                                breakPixel(newPixel);
+                            }
+                            else {
+                                deletePixel(newPixel.x, newPixel.y);
+                            }}}}
+                deletePixel(pixel.x,pixel.y);
+                break;
+            }}},
+    category: "aircrafts",
+    breakInto: "metal_scrap"
+ }
\ No newline at end of file