This Ruger manufactured early variation piston measures .630" in length and features a recessed section on one end. This early variation pistol is for the earlier model 44 semi-auto carbine and is in very good condition with light wear. (file photo)

Note: Ruger model 44 semi-auto carbines with the following serial numbers have been observed with this early variation piston:

No Prefix: 61450, 64382, 66427 & 95121