Magpul AICS Dasher/BR Kit

[Stray8]

I recently read the popular thread about modifying a Magpul AICS mag to make it more reliable with 6BR and improved cartridges. I believed that it could be done without modifying the magazine body or geometry of the spring. Many people have no issues with magpul and BR rounds, but as I am building a dasher repeater it seemed like a fun project.

Follower and baseplate were modeled and modified to work with a spacer in the front of the magazine instead of the back. This allows the spring to operate as it would normally without extra pressure on it. Spacer has a slight ramp to it that does not interfere with loading, and the ramp is held in place at the bottom by a press fit wedge on the new baseplate. Spacer is ~0.3" thick. This kit can be removed and original parts reinstalled without issue.

Follower modifications
- follower shortened to allow room for spacer
- catch to keep follower from tipping was moved rearward
- bump to keep first shell rearward was moved further back

Parts were printed in PETG and appear to be very strong. They also have not had any binding issues and appear to feed well out of my bighorn origin with both 6BR and dasher. With the extra length basically removed from the magazine the shells do not have room to scoot around much.

I would appreciate input from anybody who had feeding issues with magpul AICS magazines. I would also be willing to ship a set for someone to field test in a rifle that previously had issues. They may work fantastic, or they may have unforeseen issues.

 

[Stray8]

Created a 2rd extension and elongated the spacer to work, seems to work well with dummy rounds. Extension has enough space so that with a full 12 rds it can still be loaded with a closed bolt. Extension is captured by 30mm M3 screw that requires removal of baseplate to remove.

 

[Dgd6mm]

Usually in my Magpul 10 rounder it will tilt the follower at the 7th or 8th round. Once I was able to get 8 rounds in, cycle and fire all 8. I'm also using a Origin action, barrel has only 207 rounds down it. I have a 12 round 6br MDT that is a champ. I'm thinking of modifying my magpul.

Don Dunlap

 

[boltfluter]

Very cool stuff! Looking forward to seeing your results.

Paul

 

[Badsalad]

I'd be eager to try one. Currently have a 6BR with a Tikka action. The MDT mags seem to work okay. The magpulls work with the shorter bullets but not great with the 105s.

 

[Cuando]

Very nice.

I'd buy a few.

 

[NealC]

Here is a picture of an MDT ACIS mag made for 6mmBR. The spacer is in the rear which should make it easer to load the magazine, at least that is my experience. Did you make the 3D models yourself? If you did, what CAD program did you use? I have made a few things with Autocad Fusion 360 which is free if you do not use if for commercial use. I like plastic magazines better than the steel ones since they are cheaper and easier to modify. I don't have a 3D printer but have been sending my models to Shapeways to get printed. They have a good selection of more sophisiticated materials. I do like what you done but would like the spacer in the rear.

BTW, I can get the 6mmBR to load just fine with an unmodified PMAG ACIS magazine. They are just a pain to load. I was thinging of making the follower and modified base spring holder but with the spacer in the rear.

 

[Stray8]

Here is a picture of an MDT ACIS mag made for 6mmBR. The spacer is in the rear which should make it easer to load the magazine, at least that is my experience. Did you make the 3D models yourself? If you did, what CAD program did you use? I have made a few things with Autocad Fusion 360 which is free if you do not use if for commercial use. I like plastic magazines better than the steel ones since they are cheaper and easier to modify. I don't have a 3D printer but have been sending my models to Shapeways to get printed. They have a good selection of more sophisiticated materials. I do like what you done but would like the spacer in the rear.

BTW, I can get the 6mmBR to load just fine with an unmodified PMAG ACIS magazine. They are just a pain to load. I was thinging of making the follower and modified base spring holder but with the spacer in the rear.


View attachment 1144127 View attachment 1144128 View attachment 1144129

The models were designed in fusion 360 with a small business license. I put the spacer in the front as it keeps the magazine from needing to be modified. Also with my origin action it keeps the shell captive in the magazine longer with the spacer in the front and this allows the shell to be settled behind the extractor and not turn my controlled feed into a push feed. In the magpul mags there is a plastic ridge that helps keep the follower in place on both sides and keeps the spring rearward. The spring takes up almost all of the free room and moves well. By adding a spacer in the rear it pushes the spring against the plastic ridge and increases friction.

Take one of the magpuls apart and try putting a spacer in the back. I have seen in other threads it has been done. There is more than one way to skin this cat, this is just my solution and appears to work well so far. Although I will say I needs more real world testing.

Also, by the time you send a bunch of crap to shapeways you could already be knee deep in the 3d printing hobby. Just buy a printer already.

 

[VA_XTC_Shooter]

Do you mind sharing the STL?

 

[rrwildlife]

Following. I have an Origin inbound and plan to pick up a BR/Dasher barrel in the future.

Good stuff!

 

[rijndael]

This is a 5 year old necro-post ...

 

[VA_XTC_Shooter]

This is a 5 year old necro-post ...

I know it was old, I posted in the thread on purpose instead of creating a new thread. I don't understand the complaints about posting in relevant threads just because they are old. Instead, you would prefer hundreds of the same topic over and over?

 

[Stray8]

Do you mind sharing the STL?

Shoot me a message with your email and I’ll send them to you

 

[VA_XTC_Shooter]

Shoot me a message with your email and I’ll send them to you

My PMs are messed up, I can't start a new one. Mind sending me a PM and I can reply?

 

[762willdo]

Where does one find these kits I could use a few for my dasher?

 

[Edward_Stussy]

Shoot me a message with your email and I’ll send them to you

Any chance I could get an STL too? I’m working on my own design and want to compare them once I’m finished.

 

[Stray8]

Where does one find these kits I could use a few for my dasher?

I don’t sell them but will send you the stl files and you can have a printing service make them. They are so cheap to make and I don’t really want to deal with shipping. All I ask is the files, printed products, and derivatives aren’t sold. Also, I request updates if you use them. They are optimally designed to balance the follower on the neck of 6mm rounds. If you shoot a 25 or 22 caliber they may not work as well.

Any chance I could get an STL too? I’m working on my own design and want to compare them once I’m finished.

Send me a message with an email. See above for my requests.

 

[Jakesm]

I don’t sell them but will send you the stl files and you can have a printing service make them. They are so cheap to make and I don’t really want to deal with shipping. All I ask is the files, printed products, and derivatives aren’t sold. Also, I request updates if you use them. They are optimally designed to balance the follower on the neck of 6mm rounds. If you shoot a 25 or 22 caliber they may not work as well.



Send me a message with an email. See above for my requests.

Hi,

Can you please send me the STL also. This is awesome! I have sent you a pm.

 

[oneshot 66]

I would also like you to send me the STL. PM with email incoming.
Thank you,
Scott

 

[95GTSpeedDemon]

I don’t sell them but will send you the stl files and you can have a printing service make them. They are so cheap to make and I don’t really want to deal with shipping. All I ask is the files, printed products, and derivatives aren’t sold. Also, I request updates if you use them. They are optimally designed to balance the follower on the neck of 6mm rounds. If you shoot a 25 or 22 caliber they may not work as well.



Send me a message with an email. See above for my requests.

pm sent, thanks!