A while back I posed concerns about my Redfield International which is a bit loose.   A recomendation I'm following it to make a tube sight.  I now have a set of suitable Stevens Target Scope bases and a piece of 0.750" x 0.035" wall drawn over mandrel (DOW) steel tubing (could be a bit straighter).   The question is should I make a more or less standard length tube (24") and use the 7.2" scope base spacing with the standard front globe sight or go for a 36" tube with the front base on the front sight mount and the front sight disc mounted in the tube.  I can imagine that the forward sight base at the muzzle will really make it difficult to have enought adjustment with the rear sight base.   I thought about a full length tube with the 7.2 sight spacing but having a huge overhang at the muzzle doesn't sound right.  The vibrations might be interesting.  

The rifle is a CPA in 32-40 with # 4 barrel...wonderful rifle.   In any case I'm in only $20 for the tubing so this is just an experiment.  

Dave

UtahDave,

Send me a PM if you're interested in how I built my full length tube sight.

Jerry H

Dave I have concerns with your thin wall tubing not having enough mass to keep it stationary under recoil. A friend built one using the same wall thickness as yours and it bings him in the head each time he squeezes the trigger. He has to obtain the sight picture then move his head out of the way prior to firing the shot and wishes he would have went with a thicker wall thickness to gain the necessary mass. 

J.Louis

Here's my tube sight, made with a lot of help and advice from folks on this site. It's made from a stout 36" piece of thickwall stainless tube. I think the mass issue is one you want to pay attention to. A poke in the eye isn't much fun, especially when it's going to happen with every shot.

Is the overhang you are concerned about the length of the sight ahead of the front mount? My mounts are actually a little less than 7.2" because that's where the barrel was drilled for a previous scope. So far this is working. It's mounted on my roundball bench rifle.

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Thanks, J-Lou, but I have to credit the hand that really made it possible. Westerner did the machine work and changed some of my original guesses to make it happen.

David someone just recently posted the below base height chart for the different distances that should be of a big help to you.

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J.Louis