These stocks also carried a proof stamp, a P within a circle, applied after successful test-firing. These are the more standard sniper rifle variants of the M14. Like the M14, it was chambered for 7.62×51mm NATO. Army Special Forces ('Green Berets') have made some use of the M25 'spotter rifle'. A typical Chinese export M14 is Norinco serial number 9914. Important parts to watch for is the serial number on the receiver heel, the bolt, and the op rod mainly. A product of Troy Industries the CAR 14 (Carbine Assault Rifle 14) is a smaller and lighter tactical version of the M14. This Ruger Mini 14 serial number 180 should be used as a point of reference only. I am looking for the date of manufacture for a specific M16 (NFA) (9043575). infantry rifle, surpassing the Springfield M1903 rifle.
The M14 has remained in service longer than any other U.S.