I have received both my Lage uppers for my incoming M10/45. I need to get a set of "iron" sights. Any reason I can't use an inexpensive set like Magpul's folding sights, or other lesser sights? Not sure I'm going to use optical sights but I do have a red dot to try on it. I tried to order Lages's sight set, $125+-, but they are back ordered, and my stimulus check is almost gone.