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Article 6 – 2015

person aiming shotgun at target range

Question: I recently purchased a Fabarm RS12 and hoped my choice would be validated by you. The gun is excellent and I currently use it for Trap shooting, but i would also like to branch out into Sporting Clays. I am also hoping that you can explain to me how the point of impact setting on the adjustable rib works for different shooting formats? It has not been moved from the factory setting as I didn’t want to touch it until I had some understanding of its use.

Larry Jenkinson, Brisbane QLD


Answer: One of the most innovative changes to the clay target shooting world this century has been the evolution of the adjustable rib. In essence this feature of the shotgun allows the user to move the sighting plane above the barrel (rib) up and down to alter where the firearm actually places its payload of shotgun pellets. Before the adjustable rib was invented the only practical way to achieve this variance was by either lowering or raising the comb on the shotguns stock or by moving the point of impact of the actual barrels.

The beauty of changing the rib instead of the stock is that the same face to stock relationship can be kept. This may not sound much, but a competitive shotgun shooter makes the stock to feel like an extension of their own body. Once the stock is raised or lowered it will alter how the stock feels against its owners face.

I have never actually held the model Fabarm you have purchased, but after looking at a photo of the adjustable rib on top of its barrels it seems very easy to explain what you will need to do to alter the shotguns point of impact.

Your shotgun’s rib can only be adjusted at the front of the barrel as it is completely fixed above the breach of the shotgun. Some brands offer adjustability at both ends. To make your shotgun shoot lower you simply adjust the rib by raising it higher. To make the shotgun shoot higher you lower the rib. This may sound completely back the front, but trust me it is correct. There will be an optical illusion form in your mind when you lower the front of the rib as you will all of a sudden start looking very flat along the sighting plane or rib. This I believe is the biggest advantage of this type of adjustable feature of your shotgun as you can maintain a very accurate sight picture for your eye if it remains close to flat along the entire length of the rib whilst having the shot pattern shoot high. Before the adjustable rib was invented the stock would have to be raised thus causing the competitor to look down upon the rib. Any change of face pressure on the stock would change where the shotgun actually shot, but looking down onto the rib becomes harder to pick up any changes as opposed to simply looking flat along the sighting plane.

It is good advice to adjust this rib whilst standing near a pattern plate at your local gun club. As a general rule your rib should be lowered for trap shooting and raised for sporting clays.

Good luck with it. Once you get it right please resist the temptation to change the rib in between misses. More often than not a miss is caused by a bad shot not by the way the shotgun is set up.

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