About 600.00.You can get stripped lowers for about 100.00 at gun shows.Some times actually ones you may have heard of...These guys called "coffin arms " would build the rest of it for as little as 500.00 while you wait on it at the show.I think they use shaw barrels and everything else DPMS.
I have a Pentax 4-12 x40 gameseaker on my flattop Ar with bushmaster risers and I Hate it ! I will probably end up with a lower end Leupold or nikon and change risers to one that mounts scope more forward. On 12 x the pentax has no eye relief and the crosshairs fade.I'm really...