https://palmettostatearmory.com/psa-16-m4-carbine-length-5-56-nato-1-8-phosphate-classic-rifle-kit-black.html

$500 + a lower.

Edit:oh, and rear sight... Kit doesn't have one.

https://palmettostatearmory.com/psa-16-m4-carbine-length-5-56-nato-1-8-phosphate-classic-rifle-kit-black.html

$500 + a lower.