This thing is built like a tank - Aero Precision Mod 4 AR Handguard

This handguard is definitely shtf worthy . U can feel how much thicker the aluminum is with ZERO FLEX in it . I feel like i could run it over with a bulldozer and wont have to worry about it even scratching nevermind bending …… and YES it does work with the riflespeed adjustable gas block . Only thing you have to do to make it fit is pop out the 2 qd sling attachment points and it will slide right through . It has a VERY SOLID lock up . Love that it has the anti rotation tabs and also has 1 adjustment screw one each of the tabs to screw down to touch the upper receiver to make it that much more solid . Dont even think about buying this just do it n i promise you wont be disappointed . Best handguard on the market as far as duribilitt even over the geiselle mk rails