the RSA trigger is 75-90$ alone. bulgarian AK74 side folder kit runs around 500$ now days, no idea what that receiver brings/cost. I know the DCI one is 105$+, compliance parts minus FCG listed 30$ (?). labor $250.00 and finish 75$
$1000.00 give or take 50 bucks.
my numbers could be off i have no idea what in range charges for labor. and im not the local expert either lol