Hey everyone, I started my first build recently. And it is the definition of a franken gun. I started with a lower from a company called X Mad and it seems decent, a cmmg lower parts kit, no idea what brand buffer tube, smith and Wesson m4 stock, a2 pistol grip, spikes stt2 buffer. I just picked up a YHM upper reciever and it was a realy tight fit to the lower to the point I had to filed down the back locking lug a tiny bit to get it to where I can push the pins in and out easily. But I am now looking for a decent barrel for a decent price I'm not against spending a bit more money on the barrel but if I don't have to break the bank, why should I. I'm looking for a 16 inch mid length gas system for a decent all around build, something that I guess is decent in accuracy, decent longevity of life. Idk if I should try to find a barrel with a gas block already pinned in place or if I should try to mount a clamp on one myself. Any input would be greatly appreciated. Thanks everyone!