Fab m4 foregrip - FAB Defense Black Polymer Quad Rail Handguards for Benelli M4 Shotgun

It is relatively affordable, looks and feels good and the light mount rail is perfectly positioned for my setup. I also had to do some plastic smithing to get it to fit. At the muzzle side where the sides meet, rounding the corners a tiny bit makes it easier to insert into the barrel flange. Most work was done on the inside of the flanges where the go into the frame. I whent very slowly as to not take too much polymer off and make it loose. It has stayed very snug. I like the grip comfort particularly with the PTK angled grip. The top rail is not even with or level with the M4's rail which is not a deal breaker for me as my scope mounts to the main rail and M4 has iron sights built in.