Shop › SANTAN AR15 GAS TUBE NTRD INT LNGTH SANTAN AR15 GAS TUBE NTRD INT LNGTH $20.00 San Tan Tactical Gas Tube Intermediate Length, Black Nitride Coated, Gas Tube Kit with Pin STT-GT-I Quantity: Add To Cart Added! San Tan Tactical Gas Tube Intermediate Length, Black Nitride Coated, Gas Tube Kit with Pin STT-GT-I