This is a really good deal if you don't already have an AR pistol and want to build one.

https://palmettostatearmory.com/psa-10-5-carbine-length-5-56-nato-1-7-phosphate-10-lightweight-m-lok-moe-ept-sba3-pistol-kit-w-mbus-sparc-ar-2-10-pmags.html