Magpul MAG803-BLK Tactile Lock-Plate Type 1 Made of Polymer w/ Black Finish & 1/8" Single Ridge for PMAG 10/20/30 AR/M4 GEN M3/300 B GEN M3 Floor Plates/5 Per Pack
Magpul MAG804-BLK Tactile Lock-Plate Type 2 Made of Polymer w/ Black Finish & 1/8" Double Ridge for PMAG 10/20/30 AR/M4 GEN M3/AR 300 B GEN M3 Floor Plates/5 Per Pack