Aero precision black upper, no forward assist - Aero Precision AR15 Assembled Upper Receiver, No Forward Assist

This was tight, maybe too tight. Had to bang in the barrel and use barrel nut to seat it. Seemed like alignment slot was interference fit with pin on barrel. Probably should have filed it a little. Used wood block to protect barrel as I 'tapped' it in far enough to use barrel nut. Torqued to lower end of range to 'time' the gas tube, didn't want push my luck trying to go higher, but tight fit so not worried. Upper was also tight on lower, have to press it down a bit to get takedown pin to push in or out, but I'm good with a tight fit there, feels almost like it has an accurizer wedge in it.