Why go to all this trouble of designing what looks to me like the best designed kit i have seen for an SKS,and NOT build it to accept AK or 858 mags,858 mags are cheap,got another 4 pack for 68.00 not too long ago..i was ready to jump on this,even at the high price until i noticed it uses the same old duckbill mags,seems to me,regular mags would have made this even bigger sell out,and now with more 858 coming in,these chassis are looking even more expensive,like i said,your chassis looks amazing,and the lowly SKS is reliable as can be,so a great chassis like your combined with the ability to use 858 or AK mags would definitely cut in to the 858 and type 81 market,