Sightline Extension Tube

(SGHTEXT) Sightline Extension Tube (SGHTEXT) Sightline Extension Tube
(SGHTEXT) Sightline Extension Tube
(SGHTEXT) Sightline Extension Tube
Price: $39.95
SKU: SGHTEXT
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    • Our Recommendations

After years of going back and forth with sight extension tubes, I finally decided to design my own to overcome the problems. This tube becomes an integral part of the barrel, in function and concept, and has zero ill effect on accuracy. It will take ten years off your eyes!

The perfect solution to a big problem. Increasing the sight radius of a target rifle allows the shooter to more easily, accurately, and comfortably see the front sight. And seeing the front sight is the key to shooting good groups. Putting the front sight farther forward is the most simple and effective means to improve the shooter's ability to attain, and retain, an X-ring sight picture. Unlike lenses and other compensations, a sight extension tube is a "natural" enhancement that exhibits far fewer drawbacks.

That's all the good. The bad is that aluminum extension tubes produced by others have too many parts: barrel clamp, tube clamp, tube. Even if perfectly machined, these multiple-link attaching arrangements make it all but impossible to mount, or re-mount, a conventional tube with concentric orientation to the bore. There's also the stress on the barrel from clamping.

The Tubb Precision SightLine tube is one piece. It is also stainless steel so its behavior is more similar to that of the barrel itself. It is glued in position so there's no additional stress to the barrel. The result is no accuracy penalty and perfect mounting consistency and alignment. The tube may be easily (with heat) removed for installation on another barrel.

The Tubb Precision SightLine tube is 6.25 inches long (adds approximately 5 inches sight-to-sight distance) and fits the standard 0.750 diameter turned section on most target rifles. It works best when there is at least one inch of mounting surface on the rifle barrel. The SightLine itself is turned to 0.749 at its front to accept common size barrel band sight mounts. Mounting the sight on this stress-free tube also relieves muzzle constriction, which may enhance accuracy. The tube may be shortened one inch if desired. The exterior is a bead blasted matte finish and the entire piece is held to exacting dimensions.

Comes with detailed instructions.

    Number of Ratings: 3
    Rated:
     3.0/5.0 Stars
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    Number of Reviews: 3

    • ROY
    • 2012-04-02
    I have used these extensions on many barrels, and have never had any problem with them coming off. I have also reused them without problem when changing barrels. I rate them 5 stars. Roy

    • Rodrigo
    • 2011-11-20
    I used this sight extension tube for over 2 years and never had any problems. It connects to a standard .750 barrel tenon very firmly with the use of Devcon plastic steel glue. I shot strings of fire that heated the barrel so much that I couldn't even touch the forehand stock with my bare hands - the tube remained firmly attached and I never experienced a zero shift.

    • john
    • 2011-07-23
    This tube is a great concept. However, since this tube is held in place with epoxy, I have yet to find a heat resistant epoxy to bare the heat of the barrel. I have worked with epoxy's for better than 30 years and epoxy's that are heat resistant to 600 degrees don't work. The devcon epoxy that is reccomended is only resistant to 250 degrees. After my 600 prone slow fire, the epoxy had softened up and the tube had slid off 1/4".They need a better fastening system.



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