I want to put an extended mag tube on a 12ga 870. It has the dimples inside the mag tube that must be removed. Does anybody have a mandrile to iron out the dimples. I don't feel right about drilling them out.

I want to put an extended mag tube on a 12ga 870. It has the dimples inside the mag tube that must be removed. Does anybody have a mandrile to iron out the dimples. I don't feel right about drilling them out.

 

Frank, no need If you have a deep socket set. You just use a little oil and keep turning the socket until the dimples smooth themselves out. Works like a charm. No drilling, and you could punch the dimples back in if you ever feel compelled to.

 

Unfortunately I don't remember the socket size. I believe it is US (i.e. not metric) and fairly common size. Some people use the smaller socket first to get it started, then move to the larger socket once the small one can turn freely.

If you don't want to ruin any good sockets, hit up Harbor Freight for some cheap ones

If you don't want to ruin any good sockets, hit up Harbor Freight for some cheap ones

 

Craftsman = lifetime warranty

Frank, no need If you have a deep socket set. You just use a little oil and keep turning the socket until the dimples smooth themselves out. Works like a charm. No drilling, and you could punch the dimples back in if you ever feel compelled to.

 

Unfortunately I don't remember the socket size. I believe it is US (i.e. not metric) and fairly common size. Some people use the smaller socket first to get it started, then move to the larger socket once the small one can turn freely.

 

Great minds think alike. I was doing that Chris. I have about 100 different sockets here and believe it or not I don't have one that will give me full diameter on the tube...Believe it or not.

Great minds think alike. I was doing that Chris. I have about 100 different sockets here and believe it or not I don't have one that will give me full diameter on the tube...Believe it or not.

 

Well, you can always use one more socket. The hard part is going to the hardware store with a shotgun to check the fit.

Well, you can always use one more socket. The hard part is going to the hardware store with a shotgun to check the fit.

 

 

And the damned tube is siver soldered in.

Do you have calipers?

Do you have calipers?

 

 

Of course... That's why you guys do so good in school... Smart!

Guess I'm going to Sears.

Do you have calipers?

 

Frank. Head over to your reloading bench and pick up the calipers. I always knew those tabs on mine for measuring internal diameters would be useful for something some day.

Frank. Head over to your reloading bench. I always knew those tabs on mine for measuring internal diameters would be useful for something some day.

 

 

Of course... That's why you guys do so good in school... Smart!

 

"What do you mean, you people?!"

"What do you mean, you people?!"

New Brunswickans

Can't wait to see "you people " at Cabelas

I have the same issue. I am going to dremel the dimpels out of mine. I have heard horror stories of sockets getting stuck and then having large expense to have the mag tube brazed back on. even with drilling they will be covered with the barrel band.

http://www.midwayusa.com/viewproduct/?productnumber=154173

 

I have a old ammo spam can full of reamers you might get lucky

http://www.midwayusa.com/viewproduct/?productnumber=154173

 

I have a old ammo spam can full of reamers you might get lucky

 

Thanks! will see ya

I dremeled the dimples off and installed the extension. Seems to work well and only took about 15 minutes.

I don't understand this thread, what dimples are you talking about?

 

These have to be removed to put a mag tube extension on.

Okay wait a sec, I have an 870 with a 6+1. But the barrel and magazine tube are the same length. So am I maxed out?

Not necessarily. A lot of 3 gun guys rock the mag tube out past the barrels end.

bayonet mag extension!