Category Archives: AK Smithing / BIY

For posts about building, repairing and tuning AK Rifles and Pistols

What are rear stock options for SDS Lynx 12 Gauge shotguns?

A fellow messaged me the other day and asked what options he had to replace the light fixed stock on his SDS 12 gauge shotgun. I told him that he has a lot. The rear of an SDS is very similar to an AKM or AK-74.

The rear piece that holds the stock in is called a “trunnion” they are what provide the real strength in the sheet metal receiver. The stock is held in place by the two screws you see. Be sure to use a blade screw driver bit that completely fills the slot. You can see that whomever installed the screws at the factor did not do this and slightly deformed both slots by using an undersized screwdriver or blade bit.
You may need to use a wood dowel, or whatever you have handy, to tap the stock out. I like using a hardwood dowel because it doesn’t bend or scratch things all up.
I used a Rifle Dynamics adapter that lets you convert from the AK-rear to an AR/M4 buffer tube. Both the Rifle Dynamics adapter and the one sold by PSA are very well made.

With the rear stock removed, you can use any AKM/AK-74 traditional wood or polymer stock that you want or adapter to use an AR-style stock. Read up online before you buy because there are tons and tons of options and combinations for you.

I hope this helps you out and here are a few examples for your consideration:


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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!


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Introducing 1/2″ and 3/4″ Pull Rings For Our Quick Takedown Pins

When I originally designed our Quick Takedown Pins for the Yugo M85/M92 and then also the Bulgy/Tula Krinks, PSA AK-V and Vepr 12 shotgun, I used my hand size as a gauge for making a pull ring big enough. Guys have asked me repeatedly over the years for smaller pins but I could never find them made well enough that I felt good about carrying them — until now!

This is my AK-V with its quick takedown pin with the standard size 1″ ring installed.

This last time when I placed an order with the machine shop that makes my pins, I asked if they could do custom heavy duty 1/2″ and 3/4″ pull rings from stainless steel with a black oxide finish and they said they could! It cost a fair penny because I needed to order a boatload of each but here they are as an accessory if you want to purchase them … please purchase some 🙂

Here are the three rings side by side. The pins all come with the 1″ standard ring installed.

The 1″ and 3/4″ rings are very beefy. We had to go to smaller gauge wire to do the 1/2″ rings but they should work just fine – it’s really the pin itself that does all the work.

Click here to go to the page with all of the pins and rings if you would like to place an order.


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Palmetto Sells A Very Solid 36″ Tactical Rifle Case At A Very Affordable Price

For a number of years now, Palmetto State Armory (PSA) has sold a solid 36″ tactical rifle carrying case that you don’t hear about! I’ve owned a number of them over the years. When I bought my AK-E and needed a case, the PSA unit immediately sprang to mind. Yes, I really did buy the AK-E and this case. Nobody paid me to write this so I’m telling you my honest opinion.

One reason I wrote this post is that there are a ton of junk cases for sale on Amazon and eBay. I plan to write up some of the other good brands like Savior, Voodoo, 5.11, US Peacekeeper and what have you when I get some time. By the way, some Amazon reviews of cases are useless – “Looks good when I got it out of box” and they give it five stars when the POS obviously will not hold up but that buyer lacks the experience to know better.

Do you want to separate the cheap bags from the good ones real quick? Look at the material, the stitching (at least double stitched around the zipper and even better in high stress areas such as box stitches), the main carry handle straps should go around the bottom vs. ending on the sides. Guys, these rifles weigh a ton when you are carrying loaded mags with them. I’ve watched cheap cases fall apart.

One other comment – these bags really need a robust zipper. My preference are YKK zippers but whatever PSA uses is pretty good. I’ve only had one break out of the 4-6 that I have owned over the years. If you ever see a case with a zipper that looks like it came off light-weight clothing or a spring coat, don’t buy it. It’ll probably fail pretty quick with real world loads (not airsoft).

With my Magpul ACS stock collapsed, my AK-E is almost 36-1/4″ long and it fits nice and secure at a slight angle – you will not get anything longer in this case unless maybe if you force it but anyone looking for 36-1/4 or shorter will be happy.

There are tons of pockets and straps for tailoring the bag to your needs. I’m using a RS Regulate optic mount and a Vortex Crossfire red dot and everything is nice and protected by the ample padding.

Click here to go to the PSA website if you’d like to order one or read more.

In the following photos, the Secret Squirrel morale patch is something I added. The give you a velcro attachment point to do whatever you want with it.

30 round AK and AR magazines will fit in the provided pouches. You can get two mags each in the end pouches and four in the middle. Yes, a Chinese style 75 round drum will fit in the middle no problem.
You’re pushing some weight at this point and that is why you need good stitching and carry straps that go around the whole bag. Note how the mag pouches have both velcro as well as clips if you need to securely close the flaps. The bungee cords are for increasing the tension on the mags in the pouches.
There are MOLLE loops on both ends plus a small zippered poclet.
There is another compartment with even more storage areas directly behind the magazines. It will unzip and lie flat but it does not detach – not that I think it needs to. I’m just pointing open it is wide open in this photo.
My AK-E is packed in there. This is the only way it will fit and the ACS stock is firmly in one corner and the muzzle in the other. 36-1/4″ is as big as I think you can fit in here. That main compartment is 36″ long and about 10″ tall. It’s kind of hard to tell the exact height will the flexible padding – it’s somewhere around 10-11″ though.
The stitching and the zippers look good. FYI, if you ever see a case with a zipper that looks like it came off light-weight clothing or a spring coat, don’t buy it. It’ll probably fail pretty quick. I’ve seen some real crap import cases with ridiculously fragile zippers and light stitching.
The case has a flap to join the two carry handles together plus a full set of backpack straps. Everything looks solid – I’ve never had a problem with a strap but also need to point out I just sling it over my right shoulder and don’t use both straps — don’t think I ever will for that matter.

So the PSA cases are solid. They routinely go on sale and if you see one, I’d recommend snagging it for your AK or AR.

I hope this helps you out!


PSA AK Webstore Links

Interested in an American made AK? Consider Palmetto State Armory (PSA) as a source. Click on the following links for the associated webstore categories for AK-related rifles, pistols and parts at PSA:

PSA Has Both Yugo M70B1 and M70AB2 Parts Kits On Sale!

Hi folks, I’m a fan of Yugo AKs and have been for some time. I wanted to do a quick post to let you know that both fixed stock (M70B1) and underfolder (M70AB2) kits have hit the market at a good price. You will need to build/buy a receiver, barrel and 922r parts to complete them.

Here’s a photo from PSA of one of the M70B1 kits. Click on the image to go to the order page.
This is a photo of one of the PSA M70AB2 underfolder kits.

If you are interested in building a Yugo AK, you might want to consider snagging one of these. I suspect they will sell pretty quick.


As a reminder, PSA has their own line of AK rifles and accessories in case you want to check them out.

4/24/2020 Update: I received my M70B1 and it was in pretty good shape and the numbers matched. In other words – it’s not all rusted together. All the parts are in one bag and the wood is dinged up but it’s buildable. I hope to get some photos later — let me put it this way, I’m debating whether to buy a second or not.

PSA AK Webstore Links

Interested in an American made AK? Consider Palmetto State Armory (PSA) as a source. Click on the following links for the associated webstore categories for AK-related rifles, pistols and parts at PSA:


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.