Hey guys. I havent been against them just not a huge fan maybe due to my dad always having wwII rifles but i somehow always wanted one. I prefer the look of wood or synthetic grain stock and steel but i have to admit the ARs look cool too. My question is what are things i need to look for? I know im better off with one that will handle both .556 and .223 but any advantages to either? Ammo seems plentiful and decently priced. How reliable is the gas operation? I know i dont want to go over $800 ish if i can help it. I was looking at the ruger 556 and the m&p 15 sport II for starters. Reasonably priced and both name brands. If anyone has other suggestions im open to them. Im leaning more towards the ruger as it has iron sights with both its standard and magpul moe furniture model. It would most likely get a red dot or reflex sight but i always like iron sights for back up. Anyone have experience with either?