I suggest you contact Umarex Customer Service at the link below and send it back for repairs.
Yes, they are the airsoft division of HK, a weapons manufacturing company.
500 USD
More than likely a problem with the magazine.
The HK Stadium.
HK
The wifi+3g: 16 Gigabytes: 6,100$HK 32 Gigabytes: 7,100$HK 64 Gigabytes: 8,100$HK The Wifi Only: 16 Gigabytes: 5,280$HK 32 Gigabytes: 5,280$HK 64 Gigabytes 7,300$HK
THey shop in Hong Kong. Because they in HK, the Taxes are low.
Hong Kong = HK
HK Magazine was created in 1991.
HK Drott was created in 1936.
HK Trnava was created in 1957.
HK Vojvodina was created in 1957.