This has happened to my reflex sights as well. I was using the SMR + predator sight and it kept switching back to the default one. Back and forth. I was so flabbergasted, I wasn't even upset when I died because of it. --- "You can't predict baseball. You just can't." - John Sterling R.I.P., Andy Whitfield. Forever our Champion.
Yeah it happened to me as we'll. I was using hybrid sight and I had the pyramid sight and kept changing to the default one. It was distracting --- Xbox 360 GT: WhiteAngel50 Trying to get at least 5000 karma. It will be done!!!
Get on. And tell steven to get on too --- http://www.twitch.tv/vraage || GT: v Raage 3770K@4.7GHz || GTX680 FTW 4GB || 8GB 2133MHz || Maximus V Extreme || 250GB SSD || 2TB HDD || H100i (CPU) + H55 (GPU)