URGI / MK-16 / MK-18, MCX-Virtus, KAC URX-4 / URX-6, KRG Enclosed Forend
M-RAC Upgrade Kit (2.0/3.0 to 3.1)
M-RAC Gen 3.1 Upgrade Kit includes the following parts to make your Gen 2.0 or Gen 3.0 M-RAC Suppressor Shield compatible with other standard M-LOK accessories that have 20mm hole spacing.
2x M-RAC Tabs
1x Pic Rail
1x Low Pro Plate
All necessary Hardware & Allan Keys