AIM Sports Inc Remington 870 M-LOK Modular Rail System Black Medium. Specifications for AIM Sports Inc Remington 870 M-Lok Modular Rail System: Product Color: Black Features of AIM Sports Inc Remington 870 M-Lok Modular Rail System Compatible with most 870 shotguns 7 rows of M-LOK mounting surface No gunsmithing required bolt-on design Front Mag-tube barrel clamp Removable 6 shell holder Wide ejection port opening 1913 Mil-Spec Picatinny top rail Drilled and tapped for aftermarket front bead sight Package Contents: AIM Sports Inc Remington 870 M-Lok Modular Rail System What firearm models does the manufacturer say AIM Sports Inc Remington 870 M-LOK Modular Rail System is compatible with? The manufacturer says that AIM Sports Inc Remington 870 M-LOK Modular Rail System is compatible with Remington Model 870AIM Sports Inc MTMSG870: Remington 870 M-LOK Modular Rail System Black Medium