I have a Rock River flat top upper w/ 16" Wilson 1/8 SS bull barrel. Upper is in very good condition, with very few rounds down the pipe (less than 100). Aluminum free float forend, whcih does have small scratch (merely cosmetic). Averages 3/4" with Wally World value-pack 45gr HP's, and does better with quality ammo and handloads (a few groups with 4 shots in one ragged hole w/ flyer opening group to 3/4"). I would like to trade the upper for a 20-24" flat top upper (similar to the Bushmaster Varminter uppers). I prefer a standard weight full length barrel, but will consider bull barrels. Upper must be in very good condition, and must have verifiable accuracy comparable to my upper. Thanks!
Pics available upon request