...has me reminiscing about the AR varmint rig build the Son&Heir and I did last spring as a High School grad gift.
Lower completed. Kaiser Defense lower with Rock River 2 stage National Match trigger
Build completed. DPMS flattop upper with a 20" full floated varmint barrel, 1:9 twist.
The flip up sights were for his familiarization with iron sight install and zeroing. They came off after he learned the drill.
A Leopold VXIII 3.5x10 sits on it now. A 4x12 would prolly be a wee bit betta suited for this rigs intended use (P'dogs and 'yotes).