That gun was discussed over on Doublegunshop.com
Most agreed that it started life with a pistol grip and was converted to straight. I also noted a couple of anomalies. Here is my post from there.
Couple of out of period things for that CEO-Grade Remington. That is far and away the lowest serial number I've seen with the "P" inventory code prefix to the serial number. Normally I haven't recorded that until into the 132xxx range --
Also, haven't recorded a one-screw trigger guard that low. Normally the front screw which is also the rear tang screw, is present into the low 132xxx range when the new-style action was introduced changing the sear pin location. Also, don't normally see that style safety slide until much later, and with the concave (Remington called them hollow) rib.
That is some of the nicest engraving on the sides of a C-quality Remington I've seen. The bottom is quite standard.
C-Grade page 1903-04 Remington Arms Co. catalogue.jpg
Trap Gun, 1903-04 Remington Arms Co. catalog.jpg