Giving a cash heap plus a surplus P-83 handgun today for a Mak 90. Already own three other 'AK deriv' rifles. A friend let me try his a few months ago. The trigger was (factory) polished and really nice. Were Mak 90s--both stamped and milled--sold in the US with matching numbers? Being produced as sporters for US regulations, they should Not have required US parts to be installed under ATF reg. 922r. The seller said that nothing was replaced. Are all original triggers on all 90s known to be smoother than on most AK derivatives?