AR 15 upper receiver and barrel assembly is the main mount for all other parts of the firearms - sights are attached to it, the bolt moves along its guides, and most importantly, it also contains a barrel with a chamber.
Since the halves are fastened together on two pins, the layout of the rifle has an obvious advantage - modularity. This does not mean that by replacing the ar-15 upper and lower assembly blocks it is possible to turn a submachine gun into a large-caliber rifle. However, it is this feature, which coincides well with US gun laws, that allowed the AR system to achieve such popularity. Countless companies are currently developing and releasing something new for an easily upgradeable platform, and this ar 15 upper assembly with stainless steel barrel is no exception and it will help to reach the heights in the sport. Build your dream rifle with our parts and accessories!