Many were rebuilt to A2 status.Originally Posted by browningautorifle
I understand that most of the m16 based "precision" SPR rifles have early XM and M16A1 lowers.
The federal "aid to law enforcement" programs has resulted in distribution of various obsolescent equipment from armoured vehicles to rifles and machine guns.
Various early AR15 and XM16 variants have surfaced from the very first experimental and trials rifles, sometimes in original parts condition (buffers, charging handles ect).