Extending a grizzly mag?

[rob350]

To start, i dont have a grizzly, but plan on purchasing on soon.

From what im gathering, a extended mag (over 5 rounds)would be legal seeing how they are a pump action shotgun.

Assuming the mag body's are metal, could a guy carefully weld (probably have to tig?)together two mag body's, then possibly tac together 2 of the springs?
(this is coming from a guy with a bit of fab experience, but 0 magazine experience)

I realize the weld may be a bit messy trying to deal with metal that thin, but could ya coat it with some box liner/ rubber coating to hide the weld job and give it a cool look?

 

[Canuck223]

The problem is one of curvature and transition. To extend a magazine where the rounds stack over a rim, the mag body has to have some curve as the length increases. Adding a section to the Grizzly mag might create a problem for the follower if there is any change in the curvature.

A possible solution is to make a hollow basepad to accept the spring, allowing the stock follower to travel right to the bottom of the existing sheet metal.

 

[rob350]

I see what your saying, I looked over the mag from pics, it appears to be straight (no angle), am i wrong?

 

[Canuck223]

I see what your saying, I looked over the mag from pics, it appears to be straight (no angle), am i wrong?

Probably not, but the problem is as the length increases, there is a need for a curve, otherwise the bottom rounds get progressively canted front to back and you run into feeding of jamming problems.

Take a look at the 20 round AR-15 mags, and compare to the 30. A bad example as the .223 is just tapered, not rimmed, but you get the idea.

 

[rob350]

Probably not, but the problem is as the length increases, there is a need for a curve, otherwise the bottom rounds get progressively canted front to back and you run into feeding of jamming problems.

Take a look at the 20 round AR-15 mags, and compare to the 30. A bad example as the .223 is just tapered, not rimmed, but you get the idea.

Yeah i get what your saying, sounds like a guy would have to try duck taping some together to play around with first and see if ya can make something work.

Im just looking for alternatives to waiting for what might possibly never happen.

 

[supernova]

Rob, Ive dabbled a bit with welding sheetmetal and find thin stuff isnt too bad if youre careful. It heats and cools very rapidly so stitch welding is the best method for heat control. Ive used 1/16" E6013 rods with a little DC arc welder to tack 2 AK mag floorplates together, and they are VERY thin. A small sanding disc on a die grinder would be able to make it nice and smooth to where painting would cover it up, but a rubberized coating would be nice too. But as far as welding the springs together, I wouldnt bother trying. They should be made of spring steel which is not weldable, the heat severely weakens the steel around the weld causing it to fail very easily. This is why youre not supposed to weld semi truck frames. I would try to find a mag spring from another mag that will fit, maybe a saiga shotgun mag spring? or even an AR or AK spring may work. If you really want to weld the grizz springs, stack them on top of each other so both long parallels are directly on top of each other and tack between them. Id say just try it, cut and weld the mag bodies up straight and see if it jams. If it does, you can try adding some curvature like Canuck suggested. Maybe just an angle in the lower half like an AR mag. But post pics, or else

 

[lmar]

Just thinking out loud:

Don't have a Grizzly with box magazine but how difficult would it be to adapt Saiga-12 magazines to fit a Grizzly?

L

 

[Canuck223]

Just thinking out loud:

Don't have a Grizzly with box magazine but how difficult would it be to adapt Saiga-12 magazines to fit a Grizzly?

L

Not practical. The Saiga mags rock in to lock, so they won't fit the magwell properly. And since they are designed for a semi-auto, they are limited to 5 rounds.

 

[Parabelum]

here are some detail pictures of my grizzly magazine maybe someone can figure something out.

Just to show the little curve I used a ruler against it.

 

[rob350]

Yeah I got my grizz mag's a couple days ago. I forgot that the feeding lips are one piece, meaning I would have to cut them off in order to even test it.
I just dont feel like cutting up a $35 magazine and possibly wreck it (normally i would, but moneys getting tight during school now).

Unless someone had a worn out one/ wrecked feeding lips for me to try with?




btw I like the idea of rubberizing them. Either like spray on or I know of guys dipping metal stuff into some sort of a rubber coating product they were getting at i think napa in the states(probably would not be textured though).

 

[Parabelum]

ya its called plasti dip by performix got some at my hardware store i used it dip my bare metal tool handles in this stuff to make them brand new handles . Kinda cool now that i think i could dip my mag in it .