Also, I have received various long-guns with MLOK fore-ends/handguards. On these, I have connected a Picatinny rail piece and basically additional on either a Surefire X300 series gentle or even a Streamlight TLR-1 series gentle, which can be done with a Mossberg 590.I've a 500 and bought a mini shell adapter. Nevertheless need to set up it. Yes, t