They are either on the right side of the receiver OR barrel.
It depends on which sight is mounted. Recommend you check the manual and consult your local gunsmith use the link below
Browning's web site has a sn search function you can use.
You need to take it to a gunsmith.
Browning has sn tables on their web site located under customer service.
Since you did not provide the serial number, you will need to call Browning or check their sn references on thier web site.
The Browning BL-22 has been manufactured since 1970. I do not have any serialization for this series, but if it follows the same pattern as other models, it was made in 1968. I can't locate any Browning Lever action .22 that was made before 1970. Try this web site for info on Browning rifles: http://www.browning.com/services/dategun/detail.asp?id=5
This is a Browning .22 auto rifle made in 1968.
Take it to a gunsmith. Remove cylinder - remove firing pin pin located under rear site - use finishing nail/small center punch ,place against back of firing pin and tap lightly driving pin toward "removed" cylinder
Your browning lever action 22 was made in 1976.
No such model in the Browning line.
Contact Browning or visit their website at Browning.com