Martin of Hong Kong Off The Grid (HKOTG) is the special guest of Tim in this episode from RWTV where they test the Gas Stock Adapters for the Tokyo Marui M870 Tactical Gas Shotgun from G&P and Angry Gun... "Special guest, Martin, from HKOTG has brought in his Tokyo Marui M870 fitted with the Angry Gun Gas stock tube adapter for comparison against Tim's Tokyo Marui M870 which has the G&P Gas Stock tube adapter installed. Find out the pros and cons of each version in this episode."

You can find the stock adapters at RedWolf Airsoft.