This Harrington & Richardson manufactured third variation synthetic trigger guard is for the later model 750 Pioneer bolt action rimfire rifle and is in very good condition with normal wear.  The third variation trigger guard drops into a recessed cut out portion and is designed for the third variation stock which has hole spacing 2 9/16" apart. (file photo)

Note: Harrington & Richardson model 750 Pioneer bolt action single shot rimfire rifles with the following serial numbers have been observed with this part: N.S.N.