THIS WILL NOT WORK ON SLANT CUT REAR RECEIVER MAK-90, YOU WILL NEED M4-MAK-S THIS WILL NOT WORK ON MILLED RECEIVER MAK-90 FITS MOST SQUARE CUT CHINESE AKs Attach most M16/M4 style braces or stocks to your favorite MAK-90 rifle! JMAC's M4-MAK Stock/Brace adapter is very unique in the way it mounts to the rifle! JMAC completely replaces the factory T-Nut with their proprietary mount and is INCREDIBLY STRONG! Because it replaces the T-Nut you dont need any special adapters for the various fixed stock trunnions. Why buy JMAC's? Its incredibly strong, machined from 7075 and hardcoat anodized, offers an optimal cheek wield for irons and red dots, has Mfg: Jmac Customs Llc