I thought chrome lined bores were standard modern manufacturing methods used on all rifles made since WW2. Early AR-15 were reputed to not have chrome lined bores (Eugene Stoner didn't call for them, armorers in Viet Nam did...supposedly). Thus the call for the creation of the forward assist. Is this true ?. I like chrome lined barrels & forward assists. I would hate to find out in the middle of a firefight that my bore was not chrome lined. Am I blowing that out of proportion ?