Thomas, I would contact Adams Arms since they should have/sell compatible hand guards or can direct you to a compatible hand guard at 1-877-461-2572 or by email inquiry here : adamsarms.net/contact-7?SID=6d7f95a7f779023fa3fb06949bb9d5a0

"With the new keymod and m-lok handguards available there has to be new designs that fit the Adams Arms standard piston system.
I would like to get an updated list going. Hands on and picture verification is best .
I called Seekins Precision and they said their MCSR V2 Keymod will work with Adams Arms, see the barrel nut has been drilled out for the op rod spring nut.
seekinsprecision.com/parts-and-accessories/handguards/mcsr-v2-mod-rail.html
RAINIER ARMS- Evolution keymod, works the same as the Samson Evolution with a different look.
rainierarms.com/rainier-arms-evolution-free-float-system-9-0-keymod
RAINIER ARMS -- FORCE RAIL - Keymod. As used on their Force piston upper.
rainierarms.com/rainier-arms-forcetm-free-float-system-9-0
FORTIS-- REV keymod - As listed in the Adams Arms faq.
http://fortismfg.com/index.php?route=product/category&path=59_71
FORTIS -- REV II keymod and mlok- Listed on the Fortis site as "piston Compatible.
http://fortismfg.com/index.php?route=product/category&path=59_75
SAMSON MANUFACTURING Evolution keymod
samson-mfg.com/category/EVOLUTION_KEYMOD.html" ar15.com/forums/ar-15/The_list_of_Adams_Arms_piston_compatible_hand_guards/126-677223/