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