ProMag PM017 USGI Mag Loader Made of Polymer with Black Finish for 223 Rem, 5.56x45mm NATO AR-15, M16 Holds up to 5rds $12.74
ProMag RM20 Standard 20rd Detachable w/Roller Follower 5.56x45mm Fits AR-15 Black DuPont Zytel Polymer $15.20