Much as others have suggested, glue and pin. I would use Titebond III. Over the long haul much stronger than epoxy which hardens and can crack. But TBIII does leave a glue line. To avoid that, use Titebond II. 90% as effective as TBIII and my favorite. Then use brass screws all the way through secured with glue (epoxy OK here). The ends can be filed and sanded smooth. They will show, but, to me they just tell part of the story of the gun.