Not sure if this will help. http://www.stevespages.com/pdf/browning_bar.pdf http://www.gunsworld.com/exploded/brngbar.htm
With the serial number that you supplied,your Browning Safari bolt action rifle was produced by FN of Belguim for Browning in the year 1963.
The prefix of L70 indicates that your Browning safari bolt action rifle was made in the year 1970.
Your browning safari bolt action rifle was made by FN for browning in 1963.
The prefix of L70 indicates that your Browning safari bolt action rifle was made in the year 1970.
You will need to call Browning.
With the 5L prefix to your serial number indicates that your Browning model safari bolt action rifle was produced by FN of belguim for Browning in 1965.
Check the receiver.
Best left to a trained gunsmith.
http://www.browning.com/customerservice/dategun
By including the serial number in your question.
Your browning safari bolt action rifle was made in 1970.
You will have to call Browning with the serial number or go to their website and look it up.