I have four of these. New, never used. Looking for $25 each shipped. Will only ship where legal to own.
Factory original magazine
Made for Armalite Type "B" lowers only
Will NOT fit Type "A" lowers
Will NOT fit LR/SR style AR10 Rifles
Stainless steel, type 17-7 pre-hardened ASTM A313
10 for $6 shipped. Keep some in your parts bag, or inside your grip with the spare batteries.
Viton, high temp, O-rings to keep your extractor working slick.