Its very OK! I heard from some insiders said in the short comming future, Marui would have a licensed enhance quality (very light weight and tough) magazines for this Hi-Cap 5.1, the Magazine can withstand a very high air pressure volume of gas or air and yet it would not leak easily even repeatedly throw and drop onto hard floor ground! The new magazine can use all types of gases and HPA without problem. But it export only to USA and Europe for those who can shoot around 6J pressure and for those use all steel parts guns. BUT NOT FOR US.....
