MoCo Acquired a rifle that can take AICS mags. It arrived w/ 1 PMAG10 AC. Thats pretty long if employing prone (TIL AICS mags are one stack.) I would like to obtain a number of 5rd versions. Searching online I discover magpul has new 'Sig Cross' versions w/ a follower that has a bit feed lip within the entrance that can help if loading singles thro