eyrenuest Ching, I dont know, i just insert the head from right to left when i re-assembled it.
Also I have found a rather annoying fact about the G36C mags. I can only insert 20-25 rounds into the mags, regardless what 'position' of inserting the BB.
I have emailed VFC but they just said i should follow the instruction and have no further follow up. Have anyone experiences this as well?