Some rifles are built to withstand hand to hand combat, but only if done correctly. Using said weapons like a bat will likely damage the components and the frame. Now a spread two handed control ed swing can be both deadly and may not cause as much damage to the firearm. That is if done correctly. In simple terms Pivoting the rifle so the stock gets an up close swing is the best approach for using a long fire arm for hand to hand combat.

Now I am not the expert to use as a source for information but I have confidence in the areas I am familiar with. This does not mean I am always right in these areas but my lacking social life has made it so I had time to do more research then I am proud to admit.