The MOE M-LOK Forend is a drop-in polymer replacement for the Mossberg 590/590A1* 12ga shotguns, featuring an extended length and front/rear hand stops for improved weapon manipulation. Now with M-LOK slots for compatibility with all M-LOK accessories, this Forend adds modularity to the proven Mossberg platform for sporting use, home defense or on duty .Does not overlap receiver for sidesaddle compatibility. Includes installation wrench. *Note- not compatible with the optional Mossberg heatshield, removal is required before use. Also not compatible with 14" 590 Shockwave, 500, 535, Maverick 88 and AOW models. Made in USA.