Took me 2 years to collect all the pieces, barrel was the final piece this week. Bartered a bunch of laser engraving to collect bits and pieces. Barrel I ended up paying for but I am sure my gun dealer will order more engraving down the road so I will get that cash back. DPMS lower via barter, no name slick side upper that someone had here cheap last year I think it was. DelTon BCG I bartered for, buffer parts were barter, hand guard I ended up buying with a gift certificate. Barrel is a heavier profile from DEX, it is a match grade 1:9 fluted. http://www.shop.dezarms.com/product....&categoryId=27 my gun dealer uses them for all his custom builds. It has been a long project and a good learning experience in AR assembly.