How many times have you ordered a gas block, just to have it come in and be IMPOSSIBLE to accept a gas tube? Well, we're tired of it and here's our solution: Introducing the 'Stress Free' line of gas blocks, which are hand fitted with our gas tubes--after coating--and before going out to our clients. The gas tubes aren't included, we're just guaranteeing your build experience will be 'Stress Free!' Our Nitrided gas block features: