Ar 15 atlas s-one - Aero Precision AR15 ATLAS S-ONE KeyMod Handguard

The Aero Precision AR 15 ATLAS S-ONE KeyMod Handguards are very nice well made Handguards but they DO NOT match up to the mil-spec upper receiver like the literature says. It will fit the mil-spec upper but the pic rail doesn't line up. The rail spacing is off and lower on the Handguard. I contacted aero precision about the problem and to be honest they could care less so aero precision is off my list of reputable companies. So make sure if you decide to use this Handguard match it with the M4E1 Threaded receiver because that's the only receiver it mates with.