TacStar extension broke :(

I fail to comprehend how adding steel shavings could increase the bond strength of any glue. Care to enlighten me on how that works?
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You insinuated JB Weld wouldn't work well for this particular application and I know from experience it will.

I didn't say anything about bond strength those are your words. The metal shavings will make it harder and increase tensile strength.



GC
 
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I fail to comprehend how adding steel shavings could increase the bond strength of any glue.
Care to enlighten me on how that works?
Click to expand...
The same way fiberglass is used in fiberglass reinforced plastics.
 
Seems that if both parts are steel it could be spot welded. It seems silly that they would not weld it or otherwise pin it in place.
 
I fail to comprehend how adding steel shavings could increase the bond strength of any glue.
Care to enlighten me on how that works?
Click to expand...
Well, here's how I understand the principle of JB Weld (could be wrong, but what the hell). One wants JBWeld or any other epoxy, and I imagine most adhesives, to bond to a rough surface instead of a smooth one, to give it something to "grab" onto. By adding small particles of metal to the mix, they've allowed the epoxy to maintain a higher strength across a larger gap.

Think of the epoxy itself as a smooth surface, so the thicker the epoxy layer, the weaker it gets in the middle, because it can't grab onto itself as well as something rough. Adding the metal shavings gives it something rough to bond to in between the surfaces you're trying to stick together.

So it doesn't increase its bond strength, per se, just increases its ability to hold in larger gaps.
 
Seems that if both parts are steel it could be spot welded. It seems silly that they would not weld it or otherwise pin it in place.
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Since I'll have two of these soon enough, I'm going to go ahead and just machine the annular groove I mentioned above into the original unit, fill it with LocTite 680 Large Gap and send TacStar a picture of how they should be doing it :p

As long as it has to be two pieces, there's no reason to not have some sort of adhesive in there, LocTite and others make products specifically for this.
 
I suggest NOT using it on a "business" gun.
The tube is under tremendous stress from the spring pressure, plus the shock of firing.

The reason to use a barrel clamp is so if you give the tube a good bump, it won't break off the magazine threads.
In the case of a bonded extension, the stresses might allow the tube to "blow off" just like a clamp-less extension can blow off if bumped.

In a "real situation" this is more than just embarrassing.

Epoxy is good, but trusting your life to it in this case might not be the best choice.
 
Don't forget that the mag spring absorbs some of the shock. Also ATI makes a 100% polymer tube extension that has problem holding up to the recoil of a 12Ga.


GC
 
Threw both personal experience and anecdotal evidence, I've concluded that Tacstar and ATI are the cheapest crap on the market for a reason.

I won't buy anything from either company and I've ended up trashing everything I've ever purchased from either company.

Experience is costly sometimes. At least you know now.
 
This thread's about a month old at this point, I've only put 7 #8 rounds through the gun since this happened, which at this point is an improvement, but I've not yet had the time to really see how it holds up.

Needless to say I won't be buying a TacStar again, it's merely what's on the gun for now, Choate will be the first people I call if it pops out again. Turned out I was simply too lazy to machine a groove into the old one, I may do that tomorrow or Friday, just for giggles.
 
It can happen with any tube extension that is silver solder. I had the very same thing happen with a Choate tube extension. I used JB Weld to repair it because I didn't want to have to refinish it. The JB Weld has held up well.

I seen a picture of a aluminum Nordic Components Tube extension that was ripped away from the threaded base under recoil. It happens even with more expensive tube extensions also.


GC
 
How much does the do all of these mag extentions cost compare to the Benelli factory mag extention ? I was curious because I bought a factory mag extention for my SNT back in January for @ $60.00 out the door. I guess I'm just curious why people choose to go with the aftermarkets.
 
Factory tube extensions can have problems also. Some have had problems with the Remington factory tube extensions. There are many parts that go into making some firearms that are not actually made by the factory: magazines, bolt handles, springs, sights, Tube Extensions, barrels, choke tubes, stocks....ect


Some aftermarket parts are much better than what is offered by the factory.


GC
 
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