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Old December 20, 2006, 09:04 PM   #1
Narcoleptic Warrior
Join Date: September 16, 2006
Posts: 79
Barrel clamps and shell sticking

1st question:

I recently installed a tac star barrel clamp and mag extention on my gun. I notice that after running two magazine tubes full of shells through the gun, the barrel extention comes loose and starts to move forward toward the sighting bead. I'm pretty sure that I firmly tightened the barrel clamp when I first put it on. What else can I do to ensure that it stays put?

2nd question (for pump guns):

Any of you guys ever experienced shells sticking in the mag tube? What I mean is that you chamber a shell, fire and pump the forend, positively extract the spent shell but find that the new round is still stuck in the magazine? An extra pump is then required to chamber the stuck shell. This often happens on a full magazine load or with heavy recoiling shells.
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Old December 20, 2006, 09:54 PM   #2
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1) Loctite
2) Get a spring designed for extended tubes. Wilson Combat sells them, probably Brownells and a multitude of others as well.
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Old December 21, 2006, 12:18 AM   #3
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First order of business owuld be to get a qaulity magazine extension. The TacStar certainly does not qualify. If I had to guess, the issue you are having is due to the shody and cheap constructon of the tube.

The quality tubes, such as those from Remington, Vang, and Tank's, really arent that much more expensive, and are well worth the cost.
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Old December 21, 2006, 12:29 AM   #4
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1. What's happening is your extension is simply coming unscrewed from the vibration.
I'm assuming you have an Express gun which lacks the spring-loaded detent in the front face of the barrel support ring.
This plunger is what prevents the magazine cap or extension from unscrewing, and when you install an extension on an Express which doesn't have the plunger, the extension comes loose.
To fix this, tighten the extension down tightly, then install and tighten the barrel clamp tightly.
This should keep it from vibrating loose, but if it doesn't, put some plumber's Teflon pipe tape on the threads to help hold it in place.

2. There are several reasons why a gun will fail to feed a shell.
A. You have a problem with the shell stops. These are the two long bar-like springs in the bottom edges of the receiver.
If there's a problem with one of these, the gun will fail to feed a shell, or will feed two at a time.

B. Your magazine spring is too short or is weak. The extension should have come with a longer spring.
This often causes heavy loads to fail to feed, since inertia is pulling the shells forward in the magazine tube away from the shell stops.

C. There's a gap between the extension and the gun's magazine tube that's catching the shell or the follower and causing it to fail to feed.
Since you're having a problem with the extension coming loose, this may be the problem.
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Old December 21, 2006, 12:43 AM   #5
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Listen to what Dfariswheel said. He actually knows what he's talking about.
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