Milsig Magazine Square Head.
Replacement head (complete) for 20rd Milsig magazines. Will fit both 20rd magazines with round head (MG-001 K-Series Magazine 20rd. Round Mag Head) and square head (MG-006 M17 Magazine 20rd, PB Use Only) as well.
Formely sold as MCK-003 K-Series 20rd Mag to Para 20rd Mag Con'v Kit.