Does anyone know of somewhere I can get the little brass cap containers for 7mm pfc caps or an alternative I can fashion into. I've got a CMC Remington navy and a MGC Colt navy, both of which I think would benefit from them. 7mm caps actually stay quite reliably on the Remington but the colt nipples are way too small. I could file them down to fit 5mm caps but would rather see if I can get it working with 7mm first and the cap containers should give the extra security.