No, Wilson makes most of his own barrels start to finish, Ive heard some say the less popular calibers may be from other manufacturers but have seen no proof. They have a video of them making barrels from bar stock on their site.
Yeah, it could be the buffer, Its hard to tell with home builds since there are so many parts variations. Ive noticed a vast difference in carbine spring power between manufacturers, I try to stick with aero buffer/extension part kits but right now they are hard to find. The only reason I ended up with that no name faulty bcg was because it was all I could find at the time. At least its fixable I guess. I usually buy Aim BCGs, they are made by tool craft and Ive always had really good luck with them.
Yeah, it could be the buffer, Its hard to tell with home builds since there are so many parts variations. Ive noticed a vast difference in carbine spring power between manufacturers, I try to stick with aero buffer/extension part kits but right now they are hard to find. The only reason I ended up with that no name faulty bcg was because it was all I could find at the time. At least its fixable I guess. I usually buy Aim BCGs, they are made by tool craft and Ive always had really good luck with them.