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Old July 12, 2011, 09:29 PM   #29
chack
Junior member
 
Join Date: May 24, 2011
Location: dixie
Posts: 477
I cut the barrel last night and installed the firesights. After reading this thread I've decided that I need to get a barrel clamp as added protection against brakage. Its too easyto drop a gun from a rack or storage place and I worry that if it fell against the tube it could easily bend the mag tube. I noticed centerfire has some for $8 that's cheap insurance. I figure the fact that its a polymer will keep it from scratching up the barrel too, not that I'm worried about that.

Leverage works both ways. The force exerted on an 8" extension on the 1/2" of threads is multiplied by 16 times. If the gun gets hit with 50 lbf from an impact, that means 800 lbf on the threads. The flip side is that even if the clamp only absorbs 1/2 the force, that reduces the stress on the threads by 400 lbs.

I'll be posting a new thread about my project HD shotgun when I can take pictures of it...
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