That looks like some of the stuff FJ Vollmer sold back the day. I remember seeing a box like that in one of those old shotgun news adverts.
Either him or larry wolf possibly stuff sold by Dan Hoodenpyle.
If you have no idea who im referencing dont feel bad , only the oldtimers on here and younger people as sick as me would know. Hkparts.net did not exist in the 80s 90s and first few years of the 00's .