M 261 Military conversion Magazine

[bob smith]

Does anyone know which conversion kits currently made work with the original AR 15/M16 Military Mags with the military adapters to 22 cal ?

[Jim McCoin]

From what I have read on this forum, the M261 mags only work with the M261 kit. Black dog M261 mags work with the Kit very well. I bought a Atchinson conversion kit in the early 80's and the mags don't work with the M261 kit.

I have a couple M16 30 round mags that I use with the 10 round M261 inserts, the work very well and you can pop them in and out with no trouble.

Jim

[38super]

Avoid using the polymer mags, the insert will tip.

[brassburnz]

I have a M261 marked Conversion and one without marks. They are identical. I think the unmarked unit may be a CMMG conversion but I'm not sure. Both use the mag inserts. Bdm mags don't work.

[CHS]

I believe that Olympic Arms makes an M261-compatible conversion kit.

Also, you might want to check out Sarco. I know they had some M261 bits a while back. Maybe you could retro-fit a current kit with the parts to make it work with M261 mags. Who knows.

If you have M261 hi-caps, you can rebuild them with BDM's, as they make an M261-compatible mag.

[Seesm]

BDM for the win... Or BDM FTW

[brassburnz]

I have a M261 marked Conversion and one without marks. They are identical. I think the unmarked unit may be a CMMG conversion but I'm not sure. Both use the mag inserts. Bdm mags don't work.

BDM makes a mag that works but it's not the same one that works with the Spike conversion or dedicated upper.

[veterosa]

Here is the link for M261

http://blackdogmachinellc.net/olympic-m261.aspx

http://www.sarcoinc.com/m261.html

[bob smith]

You Guys are Great, thanks for the information.