Originally Posted by
RHINOWSO
LE901 has a monolithic upper and an integral folding front sight on the gas block. Some of the uppers are quad rails, then later on had some sort of slim mono upper with propriety rail attachments. Later they made an AR901 with a tube rail instead of monolith upper. Early versions came with the 5.56 conversion magwell and spring/buffer.
CM762 is a 16” (762x51) or 18” (6.5CM) barreled with a MLOK rail (15/17”). Same lower but doesn’t come with a conversion kit, although both can take it and a milspec upper.
Lowers are the same.