I have an ar-15 carbine that im turning into a simple shtf rifle (nothing added but a light) but I was wondering if a light mounted to a barrel affects the gun in any way compared to a light mounted to the bottom of a standard handguard. I have a bolt on rail that fits on the bottom of a regular handguard from when I thought I was gonna hang just about everything I could find off it (lesson learned) anyways what do you guys think?