Originally Posted by mrbirdguy
How does it effect accuracy and optics when u change uppers I assume I would have to change barrels also
The barrel is a fixed part of the upper assembly, optics mount to the top rail and usually stay with the upper they are sighted on. At least mine do.
Accuracy is usually not a problem unless you bump the optics or sights. One lower easily handles a number of different uppers. This is one of the facts that make the ar so attractive to shooters. A 22lr for practice, 223 for some tactical workouts and a 6.5/6.8 for deer sized game and longer ranges. Add a 458 SOCOM or 50 beowulf for hog and you can use it on anything in north America.
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