Convert 30 cap mags to 10 cap mags

[Lefty1911]

Hey there I'm new here and am not familiar with the forum and couldn't find exactly what I'm looking for.

I'm about to move to CA and I really trying to make sure I am complying with all of the laws and I found this instructable for making 30 cap mags into 10 cap mags. Is it legit?

https://www.instructables.com/id/How-to-Convert-a-30-Round-PMAG-M3-AR-15-Magazine-f/

if this has been posted before I'm sorry, just point me in the right direction and delete this thread.

[TMB 1]

[4x4Trooper]

http://www.magazineblocks.com/magento/gen-m3-pmag-mcl-10-30-block-in-stock.html

Do yourself a favor and just buy this part that's already made.

[Cokebottle]

The problem is, we can't really give a *legal* honest answer.
All anyone can do is offer what they are comfortable with.
The issue is that California law requires "permanence", but they do not define "permanence"
Does permanence mean that you need to drill out a rivet to reverse the modification, or does it mean that you have to destroy the item?
We don't know, and we can't tell you.
All we can tell you is that there have been no *known* prosecutions for magazines blocked to 10rds in the described manner.

[Cokebottle]

thanks 4x4. do you know of any items like this that can be used for steel or aluminium mags?

Pop rivets in the narrow side (front and back) block the follower from going too low.


Just as legal (or questionable) as the Magpul mods.

[4x4Trooper]

thanks 4x4. do you know of any items like this that can be used for steel or aluminium mags?

You'll need a USGI block for that.

http://www.magazineblocks.com/magento/products/magblock-kits/ar15-magblocks/10-round-ar15-limiters/usgi-mcl-10-30-block.html

[Lefty1911]

Pop rivets in the narrow side (front and back) block the follower from going too low.


Just as legal (or questionable) as the Magpul mods.

do you know how far down to drill? you also wouldn't be able to disassemble the mag after that right?

[Lefty1911]

You'll need a USGI block for that.

http://www.magazineblocks.com/magent...-30-block.html

I found it right after I made my post. tried deleting my post but you beat me to it.

[Cokebottle]

do you know how far down to drill? you also wouldn't be able to disassemble the mag after that right?

It will vary depending on your follower.
Remove the floorplate and spring.
Use a stick to push the follower to the top. Make sure the stick is on the low part of the follower that rides against the front/rear.
Holding tension on the stick, push 10 rounds into the mag.
Mark the stick at the bottom.
Push follower back in and make sure it remains near the feedlips.
Remove stick.
Place stick on the outside, lining the mark up with the bottom of the body. Mark the body at the top of the stick.
Drill and install pop rivet against the bottom of the line.
Reinstall spring and floorplate, confirm thet only 10rds will fit.

Personally, I just took my large bodies AND modified mags to a free state and only use factory 10rd mags here... but that's not a cheap option if you have a bunch of mags.

[Lefty1911]

It will vary depending on your follower.
Remove the floorplate and spring.
Use a stick to push the follower to the top. Make sure the stick is on the low part of the follower that rides against the front/rear.
Holding tension on the stick, push 10 rounds into the mag.
Mark the stick at the bottom.
Push follower back in and make sure it remains near the feedlips.
Remove stick.
Place stick on the outside, lining the mark up with the bottom of the body. Mark the body at the top of the stick.
Drill and install pop rivet against the bottom of the line.
Reinstall spring and floorplate, confirm thet only 10rds will fit.

Personally, I just took my large bodies AND modified mags to a free state and only use factory 10rd mags here... but that's not a cheap option if you have a bunch of mags.

I mean my father and I plan on doing some 80% in UT so I could leave them there with him. I was just hoping there was something I could do that allowed me to be compliant in CA but when I go out of state to shoot I could remove said mag blocks and still have 30+ mags.

[Cokebottle]

I mean my father and I plan on doing some 80% in UT so I could leave them there with him. I was just hoping there was something I could do that allowed me to be compliant in CA but when I go out of state to shoot I could remove said mag blocks and still have 30+ mags.

The problem is the "permanence" requirement, and the reason for the epoxy and pop rivets in the first link.
If the blocks can be removed by simply dropping the floorplates for easy use out of state, then they do not meet any definition of "permanent".
Needing to drill out a rivet at least provides for some measure of permanence... but we simply don't know how far the law extends without a legal definition.

[Lefty1911]

The problem is the "permanence" requirement, and the reason for the epoxy and pop rivets in the first link.
If the blocks can be removed by simply dropping the floorplates for easy use out of state, then they do not meet any definition of "permanent".
Needing to drill out a rivet at least provides for some measure of permanence... but we simply don't know how far the law extends without a legal definition.

it feels like they are trying to incriminate citizens, who are trying to be law abiding, by not defining laws so it can be left up to the interpretation of the persecutor.

[Cokebottle]

it feels like they are trying to incriminate citizens, who are trying to be law abiding, by not defining laws so it can be left up to the interpretation of the persecutor.

Welcome to California.
You're beginning to see the light.

The goal of the leadership of this state is to eliminate all private gun ownership, private vehicle ownership, and ultimately, private home ownership.

[comifornia:(]

I put my pop rivets on the front/side of AR mags to avoid the spring binding on it. 1/8 drill bit with a 1/8 pop rivet.

You can also pop rivet your Glock 9mm mags, but on those you can only put the rivet in halfway before you pop it( To avoid spring binding). Then you have file the head off the rivet so it can fit in your mag well. The 14/15 mark will block it to 10rounds.

[Milsurp1]

When I lived there I ordered these 10 round metal magazines for use in my 2016 BBRAWs: https://www.brownells.com/magazines/...rod122034.aspx