Geissele Automatics MK14, Super Modular Rail, Handguard, 9.3", M-LOK, Barrel Nut Wrench Sold Separately (GEI-02-243), Gas Block Not Included, Black 05-578B
GG&G, Inc. Side Saddle Shell Holder, Fits Mossberg 500, 590 12 Gauge, Angle Facilitates Bottom Loading of the Magazine Tube and Top Loading of the Chamber, Black Finish GGG-1515