Tag Archives: BIY

Pandora’s Box Is Open: 3D Printing Of Firearms

You may be thinking I am kind of late to the game with a post about the 3D printing of firearms but you’d be a bit wrong yourself. This domain is alive and exploding with designs that range from almost entirely 3D printed to sophisticated hybrid designs where some parts are printed and some key parts are leveraged from off the shelf suppliers such as Glock slide assemblies and AR uppers.

Just look at these examples:

This is a rendering of the FMDA DD17 Glock 17 compatible frame STL file.
This is a rendering of the FMDA DD19 Glock 19 compatible frame v1.2 STL file.
This is a rendering of the Mac Daddy frame STL file.
The authors of the Mac Daddy project provide the above photo in their Zip file as an example of the finished weapon. Note, this is not mine – I don’t even own a 3D printer!

There are just tons and tons of designs – AR receivers, AK receivers, vz Scorpion receivers, modern polymer pistol lowers … the list goes on and on.

It’s interesting to look at this vibrant community as a one step removed observer. I am intrigued by the innovation and the designs but I also have zero time to learn 3D printing at this point. Between my day job, Ronin’s Grips, family and the need to sleep at least a few hours every night, there is no free time. My wife also made it clear to me in no uncertain terms that I am not to buy a 3D printer — which really doesn’t phase me because I have no time as I mentioned.

The reason I wanted to take a moment and write this post is so that those of you who are curious can dig into the many how-to guides and access the tons of designs that are accessible at this time. It’s hard to say what way the winds of regulation will blow in the United States or a given state for that matter. In some countries, even the possession of these 3D design files would get you in huge trouble.

With that said, the following links are provided for educational purposes only. Please understand the laws and regulations in your area before you download anything or try to build a weapon. You assume all liability.

Getting Started

The first place you will want to visit is CTRL+Pew. They also have their own getting started guide online that you will want to read plus links to other guides and tutorials.

Where to find the files?

In addition to CTRL+Pew mentioned above, there are tons of download links where people are sharing/replicating a huge “Print2a” repository plus have photos and links to individual designs:

Don’t ask me questions!!

Honestly folks, I am not kidding. I find this topic fascinating from an engineering perspective but I have no plans to get into it. Consider this blog post as an introduction and you will need to take it from here.

For all the authors cranking out these amazing designs – rock on! I seriously enjoy seeing them.

Lastly, why did I mention Pandora’s Box in the title? Because I highly doubt the proponents of gun control will ever be able to close the box again.


Again, the above links and information is provided for educational purposes only. Please understand the laws and regulations in your area before you download anything or try to build anything. You assume all liability.

All renderings and the photos of the Mac Daddy are from files that claim to be in the public domain. I do not own them.

If you find this post useful, please share the link on Facebook, with your friends, etc. Your support is much appreciated and if you have any feedback, please email me at info@roninsgrips.com. Please note that for links to other websites, I may be paid via an affiliate program such as Avantlink, Impact, Amazon and eBay.


Simplify The Installation of AK Triggers With Our Slave Pin

The typical semi-auto AK trigger has four parts – the trigger body, disconnector, disconnector spring and pin. Installing it can be a challenge because you need to properly align the disconnector while sliding the pin through from one side of the receiver to another. For me, with big hands, this task takes more effort than I want.

This is your typical semi-automatic AK trigger group. On the left is the trigger body, top right is the disconnector, under the disconnector is its spring and at the bottom right is the trigger pin. The challenge is getting this all assembled inside of the AK receiver as the pin needs to pass from one side of the receiver, through one side of the trigger, through the disconnector to capture it, out the other side of the trigger and finally out the other side of the receiver. Trying to get it all to align inside of the trigger takes some patience.

The Solution – Use A Slave Pin

There is an easier approach. We can slide a properly sized dowel pin to serve as a “slave pin” during assembly to secure and properly align the disconnector and trigger outside of the receiver. This simplifies life tremendously. The unit is assembled outside where you can see what is going on, is lowered into the receiver and then the actual trigger pin is pushed through and it displaces the slave pin – the slave just exits the other side of the receiver.

This is the slave pin. Note how one side is beveled more than the other. That is the side that is inserted first. The bevel helps move things around during insertion and then the 5mm body provides the actual alignment for the trigger pin.
This is the assembled trigger group with the slave pin holding it all together.
Normally this would be in the receiver but I want you to see what is going on. As the trigger pin is inserted, it pushes the slave pin out of the way and it exits via the opposite receiver hole.
This photo shows how when the trigger pin is fully inserted, the slave simply drops out.
This is an ALG semi-auto trigger and you can see how slave pin is exiting the receiver as the trigger pin is installed.
So there’s the end result. A slave pin makes a world of difference. Note, that is one if our fire control group plates retaining the trigger and hammer pins.

Click here to order one of our AK Trigger Slave Pins

Click here if you are interested in one of our Fire Control Group Retainer Plates

In Conclusion

If you’re like me and want an easier way to install AK triggers, these new slave pins are the way to go!


If you find this post useful, please share the link on Facebook, with your friends, etc. Your support is much appreciated and if you have any feedback, please email me at info@roninsgrips.com. Please note that for links to other websites, I may be paid via an affiliate program such as Avantlink, Impact, Amazon and eBay.


Check out Gunstreamer for Firearms Videos

Folks, if you are like me and are sick and tired of the assault by liberals on our second amendment freedoms, you are always looking for sources of firearms advice. Youtube used to be a great source for videos on firearms – everything from reviews, to gunsmithing to build-it-yourself (BIY) guidance. Unfortunately, that is no longer the case – Youtube has turned anti-gun also and I resent it.

So, where can you see videos about firearms? One promising source is Gunstreamer – http://www.gunstreamer.com. I’ve watched a few videos there now and find the site easy to navigate and there are definitely some quality videos showing up there. Definitely check them out and consider supporting them – I am.


If you find this post useful, please share the link on Facebook, with your friends, etc. Your support is much appreciated and if you have any feedback, please email me at info@roninsgrips.com. Please note that for links to other websites, I may be paid via an affiliate program such as Avantlink, Impact, Amazon and eBay.