Different guns different joint or hinge pins .
Most Italian guns use the bifurcated style ie. a pin on either side that locates in a recess on either side of the barrel .
Browning and older Merkels had a through pin with a hook below the barrel .The screw head on a side by side that you see on the sides of the action is not a pin at all but a cover plate that would give access to the joint pin .Assuming we are talking about Holland pattern side locks , Purdey's and hammer guns or guns like the Parker not included .
All three have their advantages and disadvantages dependent on the style or type of action . Your point about the new Merkel is that it will have a shallower action than the older guns as is noticeable in the depths of actions between Browning and Beretta
Last edited by gunman; 01/07/16 03:53 PM.
