diff --git a/megamek/src/megamek/common/weapons/ACCaselessHandler.java b/megamek/src/megamek/common/weapons/ACCaselessHandler.java
index db4314f7acb..b791f422f94 100644
--- a/megamek/src/megamek/common/weapons/ACCaselessHandler.java
+++ b/megamek/src/megamek/common/weapons/ACCaselessHandler.java
@@ -48,7 +48,7 @@ protected boolean doChecks(Vector<Report> vPhaseReport) {
             return true;
         }
         
-        if ((roll.getIntValue() <= 2) && !(ae instanceof Infantry)) {
+        if ((roll.getIntValue() <= 2) && !ae.isConventionalInfantry()) {
             Roll diceRoll = Compute.rollD6(2);
 
             Report r = new Report(3164);
diff --git a/megamek/src/megamek/common/weapons/AmmoWeaponHandler.java b/megamek/src/megamek/common/weapons/AmmoWeaponHandler.java
index eeebc23ae34..2b89ee47d18 100644
--- a/megamek/src/megamek/common/weapons/AmmoWeaponHandler.java
+++ b/megamek/src/megamek/common/weapons/AmmoWeaponHandler.java
@@ -112,8 +112,8 @@ protected boolean doAmmoFeedProblemCheck(Vector<Report> vPhaseReport) {
         // don't have neg ammo feed problem quirk
         if (!weapon.hasQuirk(OptionsConstants.QUIRK_WEAP_NEG_AMMO_FEED_PROBLEMS)) {
             return false;
+        } else if ((roll.getIntValue() <= 2) && !ae.isConventionalInfantry()) {
             // attack roll was a 2, may explode
-        } else if (roll.getIntValue() <= 2) {
             Roll diceRoll = Compute.rollD6(2);
 
             Report r = new Report(3173);
@@ -142,8 +142,8 @@ protected boolean doAmmoFeedProblemCheck(Vector<Report> vPhaseReport) {
                 vPhaseReport.addElement(r);
                 return false;
             }
-            // attack roll was not 2, won't explode
         } else {
+            // attack roll was not 2, won't explode
             return false;
         }
 
diff --git a/megamek/src/megamek/common/weapons/HVACWeaponHandler.java b/megamek/src/megamek/common/weapons/HVACWeaponHandler.java
index 45383ce3c43..84dc7b927a7 100644
--- a/megamek/src/megamek/common/weapons/HVACWeaponHandler.java
+++ b/megamek/src/megamek/common/weapons/HVACWeaponHandler.java
@@ -91,7 +91,7 @@ protected boolean doChecks(Vector<Report> vPhaseReport) {
             return true;
         }
 
-        if (roll.getIntValue() == 2) {
+        if ((roll.getIntValue() == 2) && !ae.isConventionalInfantry()) {
             Report r = new Report(3162);
             r.subject = subjectId;
             weapon.setJammed(true);
diff --git a/megamek/src/megamek/common/weapons/PrimitiveACWeaponHandler.java b/megamek/src/megamek/common/weapons/PrimitiveACWeaponHandler.java
index 1a27128453b..78507b95922 100644
--- a/megamek/src/megamek/common/weapons/PrimitiveACWeaponHandler.java
+++ b/megamek/src/megamek/common/weapons/PrimitiveACWeaponHandler.java
@@ -43,7 +43,7 @@ protected boolean doChecks(Vector<Report> vPhaseReport) {
             return true;
         }
         
-        if (roll.getIntValue() == 2) {
+        if ((roll.getIntValue() == 2) && !ae.isConventionalInfantry()) {
             Report r = new Report(3161);
             r.subject = subjectId;
             r.newlines = 0;
diff --git a/megamek/src/megamek/common/weapons/PrototypeACWeaponHandler.java b/megamek/src/megamek/common/weapons/PrototypeACWeaponHandler.java
index 1ad1058684a..d24390c1c3b 100644
--- a/megamek/src/megamek/common/weapons/PrototypeACWeaponHandler.java
+++ b/megamek/src/megamek/common/weapons/PrototypeACWeaponHandler.java
@@ -42,8 +42,8 @@ protected boolean doChecks(Vector<Report> vPhaseReport) {
         if (doAmmoFeedProblemCheck(vPhaseReport)) {
             return true;
         }
-        
-        if (roll.getIntValue() == 2) {
+
+        if ((roll.getIntValue() == 2) && !ae.isConventionalInfantry()) {
             Report r = new Report(3165);
             r.subject = subjectId;
             weapon.setJammed(true);
diff --git a/megamek/src/megamek/common/weapons/PrototypeCLUltraWeaponHandler.java b/megamek/src/megamek/common/weapons/PrototypeCLUltraWeaponHandler.java
index 729617e28c1..f19fc27e1fa 100644
--- a/megamek/src/megamek/common/weapons/PrototypeCLUltraWeaponHandler.java
+++ b/megamek/src/megamek/common/weapons/PrototypeCLUltraWeaponHandler.java
@@ -46,6 +46,8 @@ public PrototypeCLUltraWeaponHandler(ToHitData t, WeaponAttackAction w, Game g,
     protected boolean doChecks(Vector<Report> vPhaseReport) {
         if (doAmmoFeedProblemCheck(vPhaseReport)) {
             return true;
+        } else if (ae.isConventionalInfantry()) {
+            return false;
         }
         
         if ((roll.getIntValue() <= 3) && (howManyShots == 2)) {
diff --git a/megamek/src/megamek/common/weapons/PrototypeGaussHandler.java b/megamek/src/megamek/common/weapons/PrototypeGaussHandler.java
index 329a1278eeb..69b98a970f5 100644
--- a/megamek/src/megamek/common/weapons/PrototypeGaussHandler.java
+++ b/megamek/src/megamek/common/weapons/PrototypeGaussHandler.java
@@ -53,8 +53,8 @@ protected boolean doChecks(Vector<Report> vPhaseReport) {
         if (doAmmoFeedProblemCheck(vPhaseReport)) {
             return true;
         }
-        
-        if (roll.getIntValue() == 2) {
+
+        if ((roll.getIntValue() == 2) && !ae.isConventionalInfantry()) {
             Report r = new Report(3165);
             r.subject = subjectId;
             weapon.setJammed(true);
diff --git a/megamek/src/megamek/common/weapons/PrototypeISUltraWeaponHandler.java b/megamek/src/megamek/common/weapons/PrototypeISUltraWeaponHandler.java
index 0f58d2ee4ea..92ae4249cae 100644
--- a/megamek/src/megamek/common/weapons/PrototypeISUltraWeaponHandler.java
+++ b/megamek/src/megamek/common/weapons/PrototypeISUltraWeaponHandler.java
@@ -47,6 +47,8 @@ public PrototypeISUltraWeaponHandler(ToHitData t, WeaponAttackAction w, Game g,
     protected boolean doChecks(Vector<Report> vPhaseReport) {
         if (doAmmoFeedProblemCheck(vPhaseReport)) {
             return true;
+        } else if (ae.isConventionalInfantry()) {
+            return false;
         }
         
         if (((roll.getIntValue() <= 4) && (howManyShots == 2))
diff --git a/megamek/src/megamek/common/weapons/PrototypeLBXHandler.java b/megamek/src/megamek/common/weapons/PrototypeLBXHandler.java
index eb7cff9063d..14fe0d020c6 100644
--- a/megamek/src/megamek/common/weapons/PrototypeLBXHandler.java
+++ b/megamek/src/megamek/common/weapons/PrototypeLBXHandler.java
@@ -84,7 +84,7 @@ protected boolean doChecks(Vector<Report> vPhaseReport) {
             return true;
         }
         
-        if (roll.getIntValue() == 2) {
+        if ((roll.getIntValue() == 2) && !ae.isConventionalInfantry()) {
             Report r = new Report(3165);
             r.subject = subjectId;
             weapon.setJammed(true);
diff --git a/megamek/src/megamek/common/weapons/RACHandler.java b/megamek/src/megamek/common/weapons/RACHandler.java
index a484bedfb5e..d53ea81d73d 100644
--- a/megamek/src/megamek/common/weapons/RACHandler.java
+++ b/megamek/src/megamek/common/weapons/RACHandler.java
@@ -49,9 +49,7 @@ public RACHandler(ToHitData t, WeaponAttackAction w, Game g, TWGameManager m) {
     protected boolean doChecks(Vector<Report> vPhaseReport) {
         if (doAmmoFeedProblemCheck(vPhaseReport)) {
             return true;
-        }
-
-        if (ae instanceof Infantry) {
+        } else if (ae.isConventionalInfantry()) {
             return false;
         }
         boolean jams = false;
diff --git a/megamek/src/megamek/common/weapons/RapidfireACWeaponHandler.java b/megamek/src/megamek/common/weapons/RapidfireACWeaponHandler.java
index 00684ffbd75..8d64e0c3d92 100644
--- a/megamek/src/megamek/common/weapons/RapidfireACWeaponHandler.java
+++ b/megamek/src/megamek/common/weapons/RapidfireACWeaponHandler.java
@@ -55,7 +55,7 @@ protected boolean doChecks(Vector<Report> vPhaseReport) {
         if (kindRapidFire) {
             jamLevel = 2;
         }
-        if ((roll.getIntValue() <= jamLevel) && (howManyShots == 2) && !(ae instanceof Infantry)) {
+        if ((roll.getIntValue() <= jamLevel) && (howManyShots == 2) && !ae.isConventionalInfantry()) {
             if (roll.getIntValue() > 2 || kindRapidFire) {
                 Report r = new Report(3161);
                 r.subject = subjectId;
diff --git a/megamek/src/megamek/common/weapons/RapidfireHVACWeaponHandler.java b/megamek/src/megamek/common/weapons/RapidfireHVACWeaponHandler.java
index d1ef20b2a0c..5bfbf6047d1 100644
--- a/megamek/src/megamek/common/weapons/RapidfireHVACWeaponHandler.java
+++ b/megamek/src/megamek/common/weapons/RapidfireHVACWeaponHandler.java
@@ -77,7 +77,7 @@ protected boolean doChecks(Vector<Report> vPhaseReport) {
             return true;
         }
 
-        if (roll.getIntValue() == 2) {
+        if ((roll.getIntValue() == 2) && !ae.isConventionalInfantry()) {
             Report r = new Report(3162);
             r.subject = subjectId;
             weapon.setJammed(true);
diff --git a/megamek/src/megamek/common/weapons/UltraWeaponHandler.java b/megamek/src/megamek/common/weapons/UltraWeaponHandler.java
index f755b3ec82f..56b9a973d0d 100644
--- a/megamek/src/megamek/common/weapons/UltraWeaponHandler.java
+++ b/megamek/src/megamek/common/weapons/UltraWeaponHandler.java
@@ -155,7 +155,7 @@ protected boolean doChecks(Vector<Report> vPhaseReport) {
             return true;
         }
 
-        if ((roll.getIntValue() == 2) && (howManyShots == 2) && !(ae instanceof Infantry)) {
+        if ((roll.getIntValue() == 2) && (howManyShots == 2) && !ae.isConventionalInfantry()) {
             Report r = new Report();
             r.subject = subjectId;
             weapon.setJammed(true);