2A Armament

2A Armament: lightweight components for AR-15

2A Armament is a US manufacturer based in Boise, Idaho, known for lightweight AR rifles and components machined from aluminum, titanium, and carbon fiber. On Planet Shooters you can find .875 Internal Bore gas blocks in 4140 steel and titanium, 5 and 8-position buffer tubes with castle nuts, and gas tubes for AR-15s.

How to choose

• Gas block diameter: the .875 measurement must match the barrel diameter at that section.
• Material: steel is more affordable, titanium weighs less and has better heat resistance.
• Gas system length: pistol, carbine, mid, or rifle, which must be respected when choosing the tube.