Ok guys Im new to pretty much everything in the gun world but I think I got a good start. Got a LMT 16 mrp cqb piston, one 10.5 mrp cqb upper(waiting on paperwork) and a smith&wesson M&p15X. Bought an Eotech XPS3 with a larue QD mount. I just got the eotech the other day but am curious at how to zero it(I know Im stupid but this is all new to me). I consider myself lucky to be hitting anything with the iron sights and Im not even sure Im zeroed correctly on them. And is it a bad idea to move the eotech from one weapon to the next? Sorry for the newb question but I could really use some help. Thanks
Bore sight it at a spot on the back fence or whatever to get it in the ballpark; zero it at 50 Yds for a close starting point; then tweak at 100 or 200 actual for the final.
If you want a 200M zero, it will be about 2" high at 100 and fairly close at 50. Some people prefer a 100 Yd zero. Shifting between guns means you will have to re-zero each time you move it. Sometimes only a little, but don’t count on it.
Have you taken a look at this thread?
https://www.m4carbine.net/showthread.php?t=22
I’d make sure your irons were sited in incase you need them. It will build your confidence knowing you can take care of business with your irons when necessary. I had two sights go down last week because of batteries because I left the power setting maxed out instead of at 8 as recommended. I had spare batteries but would not have been able to change them out if I’d needed either gun in a hurry.
Zero your sights at 50 yards. This gives you a 50 yard/200 yard zero, meaning that you are dead center at 50 yards and again at 200 yards with only about a 4-inch differential between 0 yards out to 200. This means at contact distances you will be about 2.5 inches low, at 25 yards you’ll be about 1.12 inches low, dead on at 50 yards, 1.5 inches high at 100 yards, 1.7 inches high at 150, and nearly dead on again at 200. Its the among the most practical zeros for most applications, its also what our department zeros our patrol rifles.
Other folks are right, practice with your irons first, then add an optic. Its kind of like learning to drive stick before an automatic; if you can shoot irons well, you can shoot an optic well, unfortunately the reverse is not true.