Can you modify a 15 round M1 Carbine Mag to a 10 rounder?

[Winchester69]

Hi all:

I just bought an M1 Carbine from out of state. It's being shipped here sans the magazines since they are 15 round versions. Other than buying a 10 round magazine, can you modify a 15 round mag so it only holds 10 rounds? I don't know where to look for any regulations (if there are any) relative to doing this. I don't want to mess around attempting a mod, and then find-out the hard way you can't do that. I've seen 10 round magazines offered for sale, but don't know if they are physically the same size as a 15 rounder with a block inserted to prevent loading more than 10 rounds or if they are physically different sizes. Any information on this would be appreciated. As far as any 10 round magazines, any that I should steer away from?

Thanks!

Jim

[bohoki]

i can but i am not sure of your skill set

10 rounders are shorter than 15 rounders but it is close in size

[IrishPirate]

if they come apart, you can block them...

[ShooterDave1]

First, this is in the wrong section. This is the marketplace section for selling and buying things. The section you want is this.... http://www.calguns.net/calgunforum/f...splay.php?f=67

Its the Centerfire Rifle section.

Second... Yes you can. To stay legal it must not be convertible back to accepting more than ten round. So if you insert a block, you have to seal the bottom so it can't come off.

There are a few ways to do it. One is to simply make a block for the inside that will prevent the follower from going down past ten rounds. The second is to insert a pop rivet in the back that will keep the follower from going past ten rounds. There are thousands of 10/20's and 10/30 mags floating around here in California. These are all 20 or 30 round mags that have been pinned to only accept ten rounds. It doesn't matter if the mag is a mile long and can hold 5,000 rounds. If its pinned and can only accept ten round, its a legal ten round mag.

My advise..... To stay legal with it, either block the 15 round mags, or disassemble them and store them for a future day and buy some ten round ones. As long as the mag is disassembled it is legal because it is a "repair kit". If it is assembled and capable of accepting more than ten rounds, its illegal.

[GeeDog]

I bought fabricated blocks for all my 15 round mags at a gun show and took my mags apart and insatalled them. they were a bit expensive for pieces of fabricated plastic but they work perfectly and can be removed easily if / when I move to a place where I don't need them any more. I think they were around $8.00 to $10.00 buck each. I also bought 2 10 round "CA Legal" mags. They aren't nearly as good as the USGI 15 rounders, but I did test them and and they do work.

[Winchester69]

Thanks all!

Appreciate the info. I like the idea of an insertable block. My impression was that aftermarket magazines weren't up to par with USGI magazines. Since the M1 is a 100% correct Inland, I wanted to stay with an original Inland magazine as well. Will remember to post any similar question in the right section next time!