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DR-200 3D Printed Fixed Stock

acgeorge

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I'm at the point of ordering more Buttplates and wanted to get your feed back. CAV Mfg A1 or standard A2.

1. Is the Calvary Mfg acceptable?
2. Should I stick with the more expensive (+$10) A2?
3. Would an option without the buttplate be interesting?





 
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yushincho87

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Just received the package today and I love it!

One thing that concerns me is how tightly the screws should be tightened when assembling it + a little mismatch on the top side, but not a big deal for me.

tight fit, overall no major issue. planning to go to Range this weekend, any particular area you need comment, let me know.

also, I believe mines CAV version. it hesitates me use often due to durability.

smooth finish and not too aggressive, I like CAV version.

20230508_174458.jpg
20230508_174415.jpg
20230508_174728.jpg
 

acgeorge

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The only problem with the existing ones is the latch, which fails to keep the little hatch fully closed.

If the USGI one doesn't solve that, I doubt it's worth the extra ten bucks.
I really like the shape of the CAV Mfg A1 over the A2, but you have to push up on the tab until it clicks. Once latched, it seems to hold; haven't had it open up on me? However, the A2 is much sturdier, latching as you "wack" it closed. I'm out of A1's and only 4 A2's remaining, just enough to finish the (4) stocks I have in process.
 

acgeorge

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Working on the next batch of (4) all will be A2. These are vapor smoothed and sanded.

Wanted to share the fit of each as I test fit each stock to my receiver. It's becoming clear there is slight variation in the Daewoo receivers based on comments by members, especially the top right corner of the receiver (chamfer).

Also, this batch incorporates the Pronged T-Nut. I finally got a pocket right, allowing the T-nut to drop in during the paus in printing, even with all the variation of the stamped prongs. I'm now confident there is no chance of the nut coming loose and believe removable Loctite can be used if desired.

Just for perspective, I have been using a stock I printed over a year ago, prior to my new 300x300x350 printer, which was printed in 3 pieces and epoxied together. I've had this stock on and off dozens of times, including the buttplate, without either nut coming loose. In addition, I haven't had any issue of the stock coming loose at the range, with the receiver nut being hand tight and no Loctite.




 
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acgeorge

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Working on a slight variation of the fixed stock, while the Left Side Folder is in limbo. Let me know what you think.

1. Eliminate storage compartment
2. Eliminate A2 Buttplate, maintain profile.
3. Eliminate sling swivel.
4. Add hard rubber buttplate, printed from TPU (Shore A 90-95)
5. Shorten stock by 20mm (.78 in)

This should better resemble the original profile and length of pull. Shown below with (2) wood screws to secure the buttplate, however, I'm considering epoxy?

 
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jjjxlr8

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You might want to go with a softer shore TPU, although the softer you go the more difficult it is to print even with a modified print head. You can also go with non-solid fill areas to make it slightly more flexible with the stiffer material.

IMG_2404.JPG

Use a denser mesh around the fastener holes for strength...
localmesh.png
 
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acgeorge

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I've never printed with TPU, it's going to be a learning experience. Also concerned with supports, apparently using TPU to support itself is a no-go. My printer is IDEX however I've never printed with two different materials. Alot to figure out including which filament to use.

Curious, what is that part you show?
 

acgeorge

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Now that is cool. I love my Galil, iron sights only.

I have some Inland TPU coming in from Micro Center. Been watching a bunch of videos on printing with TPU. Should be interesting.

Had another guy suggest printing a mold (ABS or PLA) and pour the buttplate out of some rubber like resin. A field I know nothing about.
 
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jjjxlr8

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I was looking at that route for the cheek rest because I wanted to make the rests out of a dense urethane foam similar to the originals. Kind of like a firm Nerf football. The problem is that the resin for the foam is pretty pricey and not available locally. The nice thing about the 3D printing is you can adjust the fill to make certain areas more dense and others less so to make it more flexible. The TPU is pretty durable, too.

I made some buttstock extensions for the AK74 metal folding stock out of TPU and it works very well. There is a print mode where you can give it a texture, too, which I though might be more grippy.

4.png

Texture print
IMG_20220921_173719197.jpg
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1700681656648.png
 
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Hacksaw830

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Working on a slight variation of the fixed stock, while the Left Side Folder is in limbo. Let me know what you think.

1. Eliminate storage compartment
2. Eliminate A2 Buttplate, maintain profile.
3. Eliminate sling swivel.
4. Add hard rubber buttplate, printed from TPU (Shore A 90-95)
5. Shorten stock by 20mm (.78 in)

This should better resemble the original profile and length of pull. Shown below with (2) wood screws to secure the buttplate, however, I'm considering epoxy?

I really like this one better! I bought the first version and like it but I really like the slimmer profile and shape of this one is close to the OG.
 

acgeorge

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Just a quick update. I printed (4) stocks and both versions of the buttplate (glue and screw). Warpage with this version was less than the previous, but not zero. I was able to paint (2) during the warm weekend we had, the other two are unfinished (Vapor Smoothed only). I don't believe I will be able to paint the last two. I really need a small paint box in the basement that can be vented outside. Also ironed out printing TPU, really wasn't too bad. I tried several methods for smoothing the TPU, turns out this stuff is very chemical resistant. The only thing which worked was the heat gun. However, it was very sensitive. Trying to get the right amount of heat without "bubbling" was difficult. I tried lower temps/higher time, higher temp/lower time and even tried the oven with various temp and time. I think I will leave them as printed

I had a couple stock failures during printing which gave me a chance to test gluing vs screwing. I'm leaning towards screws; the glue was messy and required clamping to conform to the minimal warpage on the stock. Waiting on the proper screws to arrive and will test .

Anyway, here are some pics of the stock vapor smoothed and painted, along with both versions of the buttplate smoothed and as printed.


 

jjjxlr8

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On the subject of buttplate attachment. You might be able to undercut the hard plastic boss on the stock and then with the slightly flexible TPU, make it so it snaps over the boss and locks in place. Just a thought. Nice work on those stocks, by the way!!
 

TheMan556

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Just got done prepping and painting this new stock design and it's honestly great, I'm in love with it. I used the screw-on buttplate and it's on there good, using TPU for the buttplate is a nice touch that I like a lot. LOP feels really good to me, I'm 6' tall and have decent length arms and it's perfect. The comb is great, I can easily use irons with a deep cheek weld or the optic with ease, it's spot on. Sanded it smooth with 240 grit and painted with Krylon Fusion Matte Black and it turned out pretty nice.
Really excited to take it to the range and see how it feels after shooting for a few hours but from the time I've had with it this thing is awesome. Highly recommend grabbing one when Acgeorge gets done with his batch, they're very worth it.


Also I know my rail is purple. It's a stormwerkz rail and I guess sometimes the finish they use comes out purple. The pistol grip is from dickpierce on r/daewoo and his website is "pierceprecisioneng.com", he's sold out of these at the moment but he also sells a lot of other Daewoo stuff I recommend checking his page out if you want some neat Daewoo parts.
 
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TheMan556

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Finally got around to shooting my Daewoo with this new stock. Sadly, I'm out of town for work and had to go to this nearby indoor range so no pretty pictures of it outside in the sunlight for yall, just boring table and concrete. Anyways, stock is holding up great I probably shot around 500 rounds through her and it's fine, of course. Length of pull is great for me, comb and all is very good and overall I'm very happy with it. Still have a lot more shooting to do but thought I'd share with you all.


 

104thEngr

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Also I know my rail is purple. It's a stormwerkz rail and I guess sometimes the finish they use comes out purple. The pistol grip is from dickpierce on r/daewoo and his website is "pierceprecisioneng.com", he's sold out of these at the moment but he also sells a lot of other Daewoo stuff I recommend checking his page out if you want some neat Daewoo parts.
The stock looks great. 👍 Thanks for mentioning where you got the grip from. I’m hoping they come back in stock soon.
 

Nismou20

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Kudos to you sir for supporting this fine rifle. Had the Magpul collapsible stock which has been terrible for a good cheek weld. Love your recreation. I would be greatly interested in purchasing one as well.
 

TheMan556

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Here is a pic of one installed on the customers Woo, no fitting needed. I actually like this shorter version better.

View attachment 385935
It really does look and feel better IMO. I'm enjoying mine, took it out to the range again but didnt get any pictures. Havent been wanting to shoot from my stash of 5.56/.223 since the ammo prices shot up a few months back. It's coming back down so I might grab a few hundred rounds for some range time. Now all I need is the K2 style grip from s0b3 if he ever gets them in, hopefully some day his guy will finish them up...
 
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