Thingiverse
Tokyo Marui AA12/SGR12 M4 Mag Adaptor by malcolmnz
by Thingiverse
Last crawled date: 4 years, 3 months ago
Maybe this is a redundant piece model now that Tokyo Marui has released their high cap magazine for the AA12/SGR12, but I though I would release it still as most people have M4 mags.
Please note I have only used this with Lonex Flash Mags, and many other M4 mags will probably not fit. If you leave a comment telling me quite specifically what you need to change to fit your mags and would like an updated model, then please comment and I will try to help.
For maximum smooth feeding, this requires a feed spring inserted inside. For maximum durability it requires a short ~14mm section of old outer barrel for the spigot that pushes into the mag. I just cut a piece of an old barrel and rounded the end that pushes into the mag slightly with a file. You could of course print a 14mm long 8.5mm OD 6.5mm ID tube instead, but I think it will wear.
As with my M870 M4 mag adaptor, this requires a V3 motor height spring for the button, and an M3 screw around 35mm long.
You can buy the spring here: https://www.retroarms.com/other/bowden-spring-for-m249-m60-mags
I printed mine upside down.
You can buy the spring here: https://www.retroarms.com/other/bowden-spring-for-m249-m60-mags
Please note I have only used this with Lonex Flash Mags, and many other M4 mags will probably not fit. If you leave a comment telling me quite specifically what you need to change to fit your mags and would like an updated model, then please comment and I will try to help.
For maximum smooth feeding, this requires a feed spring inserted inside. For maximum durability it requires a short ~14mm section of old outer barrel for the spigot that pushes into the mag. I just cut a piece of an old barrel and rounded the end that pushes into the mag slightly with a file. You could of course print a 14mm long 8.5mm OD 6.5mm ID tube instead, but I think it will wear.
As with my M870 M4 mag adaptor, this requires a V3 motor height spring for the button, and an M3 screw around 35mm long.
You can buy the spring here: https://www.retroarms.com/other/bowden-spring-for-m249-m60-mags
I printed mine upside down.
You can buy the spring here: https://www.retroarms.com/other/bowden-spring-for-m249-m60-mags