I have had my 2nd ar for a while now, but find myself yearning for a more traditional firing mechanism. my favorite mil surplus guns are chinese or old russian sks's. very solid and reliable firing mechanisms, very accurate, but not very ergonomic(easy to fix with aftermarket stock) and quick change, reliable 30 rd. last rd. hold open mags are not in existence yet. plus I'm talking 223/556. Anyone have any ideas for me other than the ones listed in the title?