The Firing Line Forums

Go Back   The Firing Line Forums > The Hide > The Dave McCracken Memorial Shotgun Forum

Closed Thread
 
Thread Tools
Old July 11, 2011, 07:32 PM   #26
Gehrhard
Junior member
 
Join Date: July 15, 2009
Location: East of the Missississippippi
Posts: 675
Deputy, my pic shows the complete Remington Military and Police extension setup with FACTORY clamp. I will admit it is better than a TacStar. But Dave is correct. And it is simple physics -- those long extensions put ALOT of leverage on those thin tubes. So some manufacturers sell them without clamps. OK So what? You have to be extra careful! Doesn't mean that's a great idea or always possible. In fact, when not giving out a quota of parking tickets, for HD you ESPECIALLY want a clamp -- tight spaces under duress is exactly where you're gonna have challenges. But as a retired member of service you know that...

If you don't know what you are gonna be using your gun for I'd urge that you have a clamp on it even if that means using a barrel that'll get scratches from it -- it goes with the territory.

In fact, I am thinking seriously of keeping the two-round extension off of my short 590 A1 and keeping the single-round Vang-Comp on the for those very reasons -- the latter is really not much longer than the standard cap.
Gehrhard is offline  
Old July 12, 2011, 10:00 AM   #27
Deputy276
Senior Member
 
Join Date: October 6, 2010
Location: Silver City, New Mexico
Posts: 102
I have made my decision and am sticking with it. Again, I reference the two FACTORY shotguns with NO barrel clamps at all. Especially the Mossberg 930 SPX, which appears to be identical to what I have installed Look, if bent extensions were happening with these guns, don't you think there would be numerous reports of it a well as complaints to the factory? There aren't. The "leverage" put in these tubes is in a straight line. I do not keep my shotgun loaded 24 hours a day, so the only time any "leverage" would be on it is when I am ready to shoot it. The clamps I have seen so far are cheap POS clamps. Unless and until I find a clamp off an 870 Mark 1...NO CLAMPS. Period.

TheKlawMan: Dimples are gone. If I left them on it would still be a 5 shot as the follower would stop at the dimples. Good ol' Dremel took care of those little suckers I don't know everything. But I know what I want and don't want. The search continues for the Mark 1 clamp.
Deputy276 is offline  
Old July 12, 2011, 08:04 PM   #28
Gehrhard
Junior member
 
Join Date: July 15, 2009
Location: East of the Missississippippi
Posts: 675
"The "leverage" put in these tubes is in a straight line. I do not keep my shotgun loaded 24 hours a day, so the only time any "leverage" would be on it is when I am ready to shoot it."

Deputy, I won't say you have no idea what you're talking about, but it is obvious you have absolutely no idea what WE'RE talking about and readers can judge the rest for themselves... Good luck.
Gehrhard is offline  
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...
chack is offline  
Old July 12, 2011, 09:57 PM   #30
Dave McC
Staff In Memoriam
 
Join Date: October 13, 1999
Location: Columbia, Md, USA
Posts: 8,812
Those folks worried about marring finishes can do as I did. Place a strip of old fashioned electrical tape inside the part that contacts the barrel. Trim as needed.....
Dave McC is offline  
Old July 13, 2011, 08:45 AM   #31
Deputy276
Senior Member
 
Join Date: October 6, 2010
Location: Silver City, New Mexico
Posts: 102
Two more examples of shotguns WITHOUT any clamps on the extensions. And these are from companies that specialize in the 870. They don't even offer an extension clamp as an option. Of course, everyone else knows better than these folks...

Wilson/Scattergun Technologies Standard Model. ALL models come without an extension clamp. Price: $1,325.



Vang Comp System



List of mods:
18" VCS Barrel with porting **
VCS Front and Rear Sights
Hogue Black Synthetic Stock
VCS Big Dome Safety
VCS Stainless Steel Follower
VCS 1 or 2 Shot Magazine Tube Extension
Refinished to a Matte Black Finish

Price: $1,495

And here is a letter from Remington stating that the mods do NOT void the Remington warranty:
https://www.vangcomp.com/Remington_Letter.html

Of course, THEY have no idea what they are talking about either.
Deputy276 is offline  
Old July 13, 2011, 01:52 PM   #32
Dave McC
Staff In Memoriam
 
Join Date: October 13, 1999
Location: Columbia, Md, USA
Posts: 8,812
I just got tired of the belittling going on in this thread.

Thread closed.
Dave McC is offline  
Closed Thread

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 08:09 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
This site and contents, including all posts, Copyright © 1998-2014 S.W.A.T. Magazine
Copyright Complaints: Please direct DMCA Takedown Notices to the registered agent: thefiringline.com
Contact Us
Page generated in 0.07686 seconds with 10 queries