This will not work with an M-LOK handguard, as it utilizes Picatinny or MIL-STD-1913 rails for mounting.
No, it is picatinny.
Yes, the Stark SE-5 Express Forward Grip will be compatible with your Mossberg 715P.
Yes, the Stark SE-5 Express Forward Grip will fit the ATI Bull-Dog SGA 12g Bullpup Shotgun as well as any rifle/shotgun with a picatinny forend.
We cannot provide legal advice. However, this is an angled grip not a vertical grip.
We cannot provide legal advice. Although, this is not a straight grip (vertical), meaning it would not convert a pistol to an SBR. Ensure you check local, state, and federal laws before purchasing.
The Stark SE-5 Express Forward Grip mounts to picatinny rail on the underside of various handguards. From what information I could find the VR80 does not have any picatinny rail on the underside of the handguard. It also seems that the VR80 has no available mounting slots of any sort on the underside of the handguard for a forward grip.
Yes, the Stark SE-5 Express Forward Grip will mount to the picatinny rail on the bottom of a Scorpion Evo. You should have enough room to mount it without interfering with a PMAG Drum.
You would need at least a 4 slot picatinny rail attachment for this Stark SE-5 Express Forward Grip.
The actual shade may vary on the Stark SE-5 Express Forward Grip but I would contact the manufacturer to see if they could confirm the shade of FDE.