3d printed Tikka 223 mags

[pods8 (Rugged Stitching)]

FYI, someone on makerworld posted up a model for a 3d printed tikka 223 mag. I've been messing around remixing it for personal use, I need to reach out to the person to see if they will allow a remix to be posted up on makerworld. If so I'm curious what features folks would want retained/deleted.

https://makerworld.com/en/models/863620-tikka-t3x-magazine-for-223#profileId-814364

Its designed based off a printed spring which is gonna have limited lifespan/durability rather than a factory spring or other metal spring. But it seemed like a good starting point to play with. I printed the original version and it snaps into my guns just fine, trying it with a factory spring is too spacious and allows the follower to nosedive cause the spring moves around. I did some basic edits on a mesh import of their file to capture the factory spring and it seemed to work fine in my limited playing.

I didn't see the point in having a removable bottom when using the factory spring (which can insert through the top) so I reworked the body to have a solid bottom and simplify the print. depending on what type of after market springs someone wanted to mess around with retaining the removable bottom would be useful though.

I printed out a solid bottom version with all the sidewall stippling and window removed. I could go either way on the stippling but don't see the point in having a window notched into a 4rd mag that you can clearing see down into.

If the original designer allows for remixes this could be a solid starting point for the community to figure out a reliable spring source to pair with DIY longer COAL mags.

Below are some dummy round 75eldm loaded at ~2.45". The seem to cycle just fine in the couple dozen cycles I've ran though so far. That is far from torture tested but so far so good on a fun free thing to play with.

Original file:

Solid bottom and follower remix, no stipling and no window:

Intent in bottom to help hold the spring in place, in addition to capturing it on the underside of the follower:

 

[ARK_Ginger]

Those look good. If there was a good source for factory magazine springs I’d be all over it

 

[pods8 (Rugged Stitching)]

Those look good. If there was a good source for factory magazine springs I’d be all over it

If you need a longer coal than your current factory mag it’s an option but my other thought is it’s a good starting point if folks wanted to try other spring sources/options.

 

[pods8 (Rugged Stitching)]

I've been having fun messing around with this further. I removed the tabs on the bottom and chamfered/radiused it (as much as feasible with printing in mind). I mirrored the stippling to both sides. I noticed on my long actions the bolt was clipping the back of the mag (when I tested for fit) which I don't think the original designer noticed on a 223 action/stop so I removed a channel of material at the rear of the mag to remove that contact as I presume the bolt body was rubbing there unnoticed previously.

I'm playing around with extending the feed lips inwards some to better address regular PLA flexing a bit and allowing the rounds to get out of position when that happens. I don't personally like PLA a ton but its stiffer than regular PETG, ASA, etc. I ordered a roll of glass fiber PETG to play around with which should be a bit stiffer yet hopefully still fairly easy to print (don't need to heat the enclosure, etc.).

Anyways, having fun messing around with this.