This Remington manufactured early variation walnut fore-end with vertical grooves is for the early model 760 Gamemaster slide action rifle (NOT the carbine) with the externally threaded action bar which is retained by a nut. This early fore-end is in good condition with multiple light dings and handling marks.  (file photos)

Note: 760 Gamemaster slide action rifles with the following serial numbers have been observed with this part: 43582, 133383 & 226135.