Here are the logs
Sep 14, 2012 7:02:45 PM com.heuristix.guns.Mod getHDTextureCompatibleClass
FINE: TextureHDFX not found; Optifine is not installed or is missing files -- Optifine crashes when installed
Sep 14, 2012 7:02:45 PM com.heuristix.guns.util.Log log Tried MCPatcher, didn't fix it.
FINE: Gun loaded 44 Magnum
Sep 14, 2012 7:02:45 PM com.heuristix.guns.util.Log log
FINE: Gun loaded AK47
Sep 14, 2012 7:02:46 PM com.heuristix.guns.util.Log log
FINE: Updated gun file BK.gun2 from version 0.9.62 to 1.0.3
Sep 14, 2012 7:02:46 PM com.heuristix.guns.util.Log log
FINE: Gun loaded Ballistic Knife
Sep 14, 2012 7:02:46 PM com.heuristix.guns.util.Log log
FINE: Gun loaded FAL
Sep 14, 2012 7:02:46 PM com.heuristix.guns.util.Log log
FINE: Updated gun file G17.gun2 from version 0.9.62 to 1.0.3
Sep 14, 2012 7:02:46 PM com.heuristix.guns.util.Log log
FINE: Gun loaded G-17
Sep 14, 2012 7:02:46 PM com.heuristix.guns.util.Log log
FINE: Gun loaded Intervention
Sep 14, 2012 7:02:46 PM com.heuristix.guns.util.Log log
FINE: Gun loaded L118A
Sep 14, 2012 7:02:46 PM com.heuristix.guns.util.Log log
FINE: Gun loaded M16
Sep 14, 2012 7:02:46 PM com.heuristix.guns.util.Log log
FINE: Gun loaded M1911
Sep 14, 2012 7:02:46 PM com.heuristix.guns.util.Log log
FINE: Gun loaded M2-2
Sep 14, 2012 7:02:46 PM com.heuristix.guns.util.Log log
FINE: Gun loaded M203
Sep 14, 2012 7:02:46 PM com.heuristix.guns.util.Log log
FINE: Updated gun file M24.gun2 from version 0.9.62 to 1.0.3
Sep 14, 2012 7:02:46 PM com.heuristix.guns.util.Log log
FINE: Gun loaded M24
Sep 14, 2012 7:02:46 PM com.heuristix.guns.util.Log log
FINE: Updated gun file M250K PR.gun2 from version 0.9.62 to 1.0.3
Sep 14, 2012 7:02:46 PM com.heuristix.guns.util.Log log
FINE: Gun loaded M250K Pulse Rifle
Sep 14, 2012 7:02:46 PM com.heuristix.guns.util.Log log
FINE: Gun loaded M4A1
Sep 14, 2012 7:02:46 PM com.heuristix.guns.util.Log log
FINE: Gun loaded M60
Sep 14, 2012 7:02:46 PM com.heuristix.guns.util.Log log
FINE: Gun loaded MAC10
Sep 14, 2012 7:02:46 PM com.heuristix.guns.util.Log log
FINE: Gun loaded MP5
Sep 14, 2012 7:02:46 PM com.heuristix.guns.util.Log log
FINE: Gun loaded SMAW
Sep 14, 2012 7:02:46 PM com.heuristix.guns.util.Log log
FINE: Gun loaded SPAS12
Sep 14, 2012 7:02:46 PM com.heuristix.guns.util.ReflectionFacade invokeMethod
FINE: Could not invoke java.lang.ClassLoader+defineClass
Sep 14, 2012 7:02:46 PM com.heuristix.guns.util.ReflectionFacade invokeMethod(Class clazz, Class[] paramTypes, Object... params
FINER: THROW
java.lang.reflect.InvocationTargetException
at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.heuristix.guns.util.ReflectionFacade.invokeMethod(ReflectionFacade.java:71)
at com.heuristix.guns.Util.defineClass(Util.java:350)
at com.heuristix.guns.AbstractGunBridge.read(AbstractGunBridge.java:77)
at mod_Guns.initItems(mod_Guns.java:188)
at mod_Guns.init(mod_Guns.java:117)
at com.heuristix.guns.Mod.load(Mod.java:68)
at ModLoader.init(ModLoader.java:938)
at ModLoader.addAllRenderers(ModLoader.java:185)
at avy.<init>(RenderManager.java:87)
at avy.<clinit>(RenderManager.java:14)
at net.minecraft.client.Minecraft.a(SourceFile:260)
at net.minecraft.client.Minecraft.run(SourceFile:516)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.LinkageError: loader (instance of net/minecraft/GameUpdater$2): attempted duplicate class definition for name: "Item762x51mm0"
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.lang.ClassLoader.defineClass(Unknown Source)
... 16 more
Sep 14, 2012 7:02:46 PM com.heuristix.guns.util.Log log
FINE: Updated gun file SVD.gun2 from version 0.9.62 to 1.0.3
Sep 14, 2012 7:02:46 PM com.heuristix.guns.util.Log log
FINE: Gun loaded SVD