Do you know if the hole is threaded? If so, maybe some sort of attachment was put on the gun. Just say no!
To let the water drain out.....
It's a modification by the Mexican Drug Cartels ...
After wading across the river ... the hole lets your gun drain out the crossing water ... then a shot of WD40 in the hole and they are Good to Go !
Holes can be very functional !
Gary
Is the side plate so buggered up it doesn't sit flush anymore? Bubba had 1 to many 6pacs?