I normally do my research first before I buy anything, but I didn't before I bought my AR a few months ago. It functions 100% and is very accurate. After finding this board, I'm reading a lot of negative posts on Investment Cast Receivers which mine has. I'm pretty anal when it comes to firearms and the wheels start turning. These boards are full of great information, and also makes me think. My question is should I swap out my lower receiver for a forged one, or just keep the cast since it's a great AR except for the lower? After reading, I'm just waiting for my lower to turn to dust while I'm holding it, or I'm affraid if I bang it on anything it will instantly crack in to. Does anyone have any good experiences with cast lowers? Will they last for the normal Joe?