I have up for sale is a heavy barrel 24" with heavy fluted from bushmaster. 1/9 twist. fixed a2 handle, super low round count approx 300. needs nothing, comes with a metal mag. may trade for another ar15 with shorter barrel. if interested I have the crimson trace ar15 with the a2 carry handle. installed. but will be available for additional if interested. looking for $800 barrel is $375 by it self. here is what bushmaster says about the barrel Machined from finest Chrome Moly Vanadium Steel; fluted for light weight, and Manganese Phosphate finished. This non-chrome lined barrel is button rifled 1 x 9"; has a hybrid SAAMI Spec. chamber with longer throat or "Leade" to accommodate 5.56mm ammunition and is 1" diam. out to the gas block with an 11� competition muzzle crown; V Match Sight Base/Gas Block and Varminter Vented Forend. We recommend assembly onto your Upper Receiver by anexperienced AR15 gunsmith to achieve full accuracy as parts are shipped unassembled.