Also, I have got a variety of long-guns with MLOK fore-finishes/handguards. On these, I've hooked up a Picatinny rail piece and merely additional on possibly a Surefire X300 series light or maybe a Streamlight TLR-one series light, which can be finished on the Mossberg 590.I might be ready to guess that 870s have the degree of recognition in Regula