08-23-2012, 02:28 PM
Shiv,
Im not sure, maybe someone will measure theirs (AA A3 upper) and post here what they get. My lo-pro after milling for a side charger is .498 at the inside(smallest measurement). All my A3's are .496-.500. IIRC, I measured the lo-pro when I first got it and decided that it would work with no machining unless extractor was bent or the extr. spring was too weak/strong. My cousin has the other lo-pro I finally sold him, Ill measure maybe this weekend. It hasnt been milled out at all.
Im not sure, maybe someone will measure theirs (AA A3 upper) and post here what they get. My lo-pro after milling for a side charger is .498 at the inside(smallest measurement). All my A3's are .496-.500. IIRC, I measured the lo-pro when I first got it and decided that it would work with no machining unless extractor was bent or the extr. spring was too weak/strong. My cousin has the other lo-pro I finally sold him, Ill measure maybe this weekend. It hasnt been milled out at all.