I have a Bushmaster M4 and am looking for a second AR to have fun with at the range. I can pick up a Plinker Plus for $610 before shipping and FFL fee or order the standard 20" rifle kit from Del Ton for $615. What do you all consider the better value? The Plinker is a complete rifle and I would have to assemble the lower on the Del Ton. Again, I already have the Bushmaster for serious work and just want a second AR for fun. Thanks.