Impossible to answer without a detalied description of condition.
on the bottom of the receiver
on the bottom of the receiver
by the serial number on the bottom of the receiver
Check the receiver sides and bottom and the barrel
On the bottom of the receiver
ojn the bottom of the receiver
on the bottom of the receiver
On the bottom of the receiver just forward of the magazine port. American A5s are on the left hand side of the receiver
On the bottom of the receiver forward of the carrier port and trigger
The number before the "V"
You will need to supply a serial number to get the correct answer to your question.
By the serial number located on the bottom of the receiver. Check the number and re-ask on Wiki