Grizzly Drum/Box Magazine Input

Please pick 1 choice from 1-3, 1 choice from 4-7, or 8 if you have no interest.

  • Make it hold ~15 rounds

    Votes: 98 14.5%

  • Make it hold ~20 rounds

    Votes: 108 16.0%

  • Make it hold >20 rounds

    Votes: 113 16.7%

  • I'd pay <$80

    Votes: 33 4.9%

  • I'd pay ~$80

    Votes: 68 10.1%

  • I'd Pay ~$100

    Votes: 92 13.6%

  • I'd pay >$100

    Votes: 65 9.6%

  • I don't have a grizzly magfed shotgun and dont want one but just like voting :)

    Votes: 98 14.5%
  • Total voters
    675
Gas Can said:
Had a bit of time to work on the tower. A little mock up pic to check clearances.

MkupTwr.jpg


GC
Click to expand...

nice job
 
wood800 said:
What you using for a spring? Looks cool!
Click to expand...

There is a torsion spring on the inside of the drive gear thingy riding on the alum shaft. Its a little too small for now, but I had it lying around and it works for bench testing. There is some extra clearance for a larger spring when the time comes.

AxilSprgRearGuideAssm.jpg


GC
 
this is probably a stupid question, but how do the last few rounds get up into the reciever? I understand the first lot of them would be pushed up by the ones following them, but what about when all the rounds in the "ring" section are gone? How do the last 2 or 3 "climb" into the reciever?

Sorry if this is a really dumb question lol, I've just never seen one of these taken apart before.
 
Hmmm, I just had the sudden urge to buy a Grizzly mag shotgun.

Send me the drawings and I'll make you a set of the prototype parts out of aluminum for free. Aluminum is often cheaper than plastic.


Edit: hold on a tick, how will it feed the tower shells once the drum is empty?
 
The drum holds 10 shells and the tower looks like it'll hold 3. Maybe use 2 or 3 dummy rounds permanently linked to the mag follower. IIRC the .22 mag tower conversions listed at places like Questar use a similar system. Ending up with a net 10 round drum.
 
aftermidnight said:
The drum holds 10 shells and the tower looks like it'll hold 3. Maybe use 2 or 3 dummy rounds permanently linked to the mag follower. IIRC the .22 mag tower conversions listed at places like Questar use a similar system. Ending up with a net 10 round drum.
Click to expand...

Pretty much bang on. Im gonna try to use a little arm to push the last couple of rounds up the tower so I only need 2 dummy rounds.

GC
 
Gas Can said:
Pretty much bang on. Im gonna try to use a little arm to push the last couple of rounds up the tower so I only need 2 dummy rounds.

GC
Click to expand...
That's what I was thinking, some sort of follower on a spring that could stow inside the rotary cog part and come out to push the last 3 rounds up.

Maybe make the dummy rounds short enough so they can go between the toothed plates as they leave the tower, that way you won't loose capacity.
 
Armedsask said:
That's what I was thinking, some sort of follower on a spring that could stow inside the rotary cog part and come out to push the last 3 rounds up.

Maybe make the dummy rounds short enough so they can go between the toothed plates as they leave the tower, that way you won't loose capacity.
Click to expand...

Sask, That a good idea, and a very nice offer. I may take you up on that.

CycleMK.jpg


Cycle testing has started.:D

Initial results are.....gaurded.

GC
 
Perhaps if one 'scallop' of the spider was left out of the milling design and this spot used as an anchor point for a follower linakge which would only need to be cylinders of whatever material shell sized on pivoting links. They should feed smoothly onto the spider like shells would.
 
You should make one for the Valtro.... The normal box mags are like 100 dollars a piece. I would buy 2 or 3 drum mags if they were under 100 dollars...
 
aftermidnight said:
Perhaps if one 'scallop' of the spider was left out of the milling design and this spot used as an anchor point for a follower linakge which would only need to be cylinders of whatever material shell sized on pivoting links. They should feed smoothly onto the spider like shells would.
Click to expand...
That's what I had in mind, but have them right inside the circle of the live shells, thus not losing any capacity.

Don't know if it will work. I'm going to start modeling some stuff in Solidworks to test function.
 
Armedsask said:
That's what I had in mind, but have them right inside the circle of the live shells, thus not losing any capacity.

Don't know if it will work. I'm going to start modeling some stuff in Solidworks to test function.
Click to expand...

This is one thing I need to do. I bought the motors and controllers to upgrade my mill to CNC but I have fallen flat in the CAD/CAM dept. I have had the equiment for over a year but still havn't used it.

Any recommendations for a CAD/CAM software for the novice that will not break the bank?

GC
 
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