I am the lucky recipient of an all expenses paid trip to a foreign country where the targets are shootings back. I will be carrying a standard M4 1/7 twist 16in barreled rifle with and Aimpoint Comp M4 and BUIS. I am looking for any suggestions on a personally bought quick release mount that has repeatability when taking off, putting back on and an scope with magnification for such a setup. Any info on the issued ammo whether it will be the M855, SS109 or something else would help to for a practice setup.