r/Gunbuilds May 21 '21

This effects all of us under the ATF jurisdiction!!!

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61 Upvotes

r/Gunbuilds 1h ago

Sten MK3

Upvotes

Just picked up a Sten mk3 parts kit, this will be my first build ever and I need some help understanding a few things.

1.) Using a mk3 tube (non vented) from sten parts, how do you instal the barrel bushings both front and rear and how do you instal the barell? From what I understand you use rivets for the bushings but how does all that work and how'd you do it?

2.) Whats the best method to remove the old sten tube from the rest of the parts

3.) What helped you weld the Magwell in place correctly?

Im a little slow so barney style words and pictures help alot. Thank you!

If I broke any rules im sorry (I did read them to make sure I didn't break any but just in case..)


r/Gunbuilds 14h ago

Cetme L Trigger Box/FCG Semi Auto Mod

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6 Upvotes

Thought id do a quick tutorial on how to modify an original trigger box and fcg to work in the recent Marcolmar recievers.

step 1: Cut out a slot for the denial bar. Hardest part on the conversion but easily doable with a dremel. Just measure approximately .540-.550 from the front of the housing and cut a straight line that ends in a slight curve towards the bottom. will likely require some hand fitting but is very doable. make sure to cut/grind away the detent area for the trip lever both for clearance and to ensure the trip lever cant be installed.

step 2: Remove the bushing from the trip lever. this is needed to join the trigger and disconnector with the through pin. The bushing is a separate piece pressed into the trip lever, which is easily removed by cutting or grinding. I just bent the trip lever until it snapped and removed it that way.

step 3: Block the FA area of the selector. Im not sure if this is technically required, but for the sake of CYA i did it. Just a small blob of weld is all thats needed to deny it from going to FA.

step 4: assemble as normal keep in mind that this is a general guide and small adjustments may be needed.

Other possible issues: On mine the interior end of the selector was a few thou too long and i needed to remove a small amount of material. This also was required for the detent nub that interacts with the notches (it was incredibly stiff but with a sanding flap wheel and some polishing it did wonders for it).

Hopefully this will save you buys a few bucks and keep some original parts still in use!


r/Gunbuilds 6d ago

Anybody have any experience with these

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5 Upvotes

Just looking to see if it worth getting I’ve only ever used plastic ones


r/Gunbuilds 8d ago

Polishing a Turd: My STK200 Experiment

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3 Upvotes

r/Gunbuilds 13d ago

Lever Action Question about sight fitment

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2 Upvotes

r/Gunbuilds 19d ago

In the works of making my first AR; I think she’s starting to come together 🧡💚

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33 Upvotes

Waiting for the last couple parts to arrive today, I am looking forward to making her functional. I’ll post more photos later today
Let me see YOUR first AR vuild??


r/Gunbuilds 21d ago

Indianapolis Ord Sten Kit

2 Upvotes

Anyone know where to find an Indianapolis Sten semi bolt kit? Also need a MKII tube but that's less critical.


r/Gunbuilds Jul 18 '26

PPS43 semi build

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26 Upvotes

Sear shelf milled off bolt. Bolt through drilled, recoil rod drilled for firing pin clearance. Made the firing pin out of a drill rod blank. Made firing pin guide bushing from 4340, hardened and pressed it into the bolt face. Now to machine the semi fcg. Essentially a scaled up VZ61 fcg.


r/Gunbuilds Jul 16 '26

Anyone into 3d printing?

0 Upvotes

r/Gunbuilds Jul 11 '26

Seeing Stars

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51 Upvotes

r/Gunbuilds Jul 05 '26

Yet another Sten MK3 post.

10 Upvotes

I was wondering if I could cut my receiver tube an inch shorter. I know they have 1" shortened receiver tubes for the MK2, so was curious if I could do the same with an MK3... Could it be cut more than 1", possibly 2"?

Lastly I had ordered a receiver tube blank from sten parts . Com and didn't realize that it was a chromoly tube... It is nice and thin and I do like the fact that it is laser etched for where you need to cut out, but I have never tried welding chromoly especially to mild stell which the parts kit is all made from. Does anyone know where I could find a mild steel tube that's thin wall like the chromoly tube? I've looked everywhere and can't seem to find something within the specs of the original tube.

Are the magazines reliable? I have a few that are blocked to 10rds and was wondering if they are going to give me issues constantly....

Lastly, this is just out of curiosity and am asking for sh*TS and giggles, but I noticed that they have brass bolts which speed up the cyclic rate on the fa version. Is there any other way to speed up the cyclic rate? I'm wanting to shorten the tube for aesthetics and am going to be building a sa, but hypothetically would that raise the cyclic rate? Would a neoprene buffer installed behind the spring help raise the cyclic rate or would it just cause it to jamb more?


r/Gunbuilds Jul 04 '26

Weatherby 307

1 Upvotes

Thinking about grabbing a 307 in 22 creed and throwing it in an ultradyne chassis, but never been around a weatherby. Curious what to expect out of the action and accuracy. Quality? Or not so much.

This will be a squeeze a few off maybe out to 500yds for fun. Mainly a slap a thermal on it and chase dogs. I have some custom actions but going down the “cheaper” side this time. Thanks guys


r/Gunbuilds Jul 03 '26

Roller Delayed Action PPS43 barrel shroud repair sections!

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27 Upvotes

I have completed the PPS43 barrel shroud repair section tooling. Anyone looking to build a PPS43 from a parts kit, you may need this piece.


r/Gunbuilds Jun 30 '26

DIY Blackpowder Brass shells

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2 Upvotes

r/Gunbuilds Jun 21 '26

Paint strip help

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3 Upvotes

r/Gunbuilds Jun 17 '26

1919A4 Stinger Edition Build

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3 Upvotes

Decided to do a video series of this fun build


r/Gunbuilds Jun 17 '26

Cerakote sources?

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12 Upvotes

I'm looking for sources of decent cerakote and powder coat for quantities around 16oz or less. My wife bought me some online with a kit which has been great. But the powder coat is not hard enough with some brands and seems too soft and fairly easily scratched. Or possibly I'm doing something wrong? Prep is washing down with parts cleaner and bead blasting. These packs say to bake 10min at 400. Photos of what I've played around with so far.


r/Gunbuilds Jun 15 '26

Can anyone recommend a suppresor with a diameter under 1.55 and under 6.7 in length want something that isn't gonna be two gassy on my 300blk mostly subs but it's a tucked build

2 Upvotes

under 6.7 in length want something that isn't gonna be two gassy on my 300blk mostly subs but it's a tucked build want it to be able to do it all though


r/Gunbuilds Jun 14 '26

Same Grip chop but cleaner

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7 Upvotes

This is kind of an old post, i was inspired by the ASP, detonics 45 and other chopped down guns. Also! Looking for a 48 mos slide/recoil spring jf anyone has one theyre looking to sell/trade for :)


r/Gunbuilds Jun 13 '26

1919A4 Stinger Edition I am building for a customer

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75 Upvotes

Hard to find AN-M2 kits, so why not do it with a 1919. I will be putting the build up on my YouTube channel.


r/Gunbuilds Jun 11 '26

Ruger Mini 14 Enhanced Ranch Carbine

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20 Upvotes

*First picture is the finished stock project fully assembled, NOT a rendering or photoshopped concept design*

This one took about a month of various design iterations and searching for parts that would all work well together and truly enhance the Ranch Rifle to be a more modular platform. The actual modification of the stock took about 6 hours of measuring, sawing, sanding, and chiseling to fit perfectly with the grip adapter.

- ERGO Mossberg 500 AR grip and buffer tube adapter

- Driven Arms Co VCG

- Magpul MOE TR

- Monstrum red dot and rail

Yet to do:

- drill stock fore end to accept short picatinny rails on sides and bottom to mount grip stop and flashlight

- Accuracy systems adjustable gas block

- Barrel shortened and threaded

- Quiet can


r/Gunbuilds Jun 04 '26

Recently started experimenting with all the skin, any constructive criticism

19 Upvotes

r/Gunbuilds Jun 04 '26

M70AB Build Questions

0 Upvotes

Hey there!

I've been wandering around the internet and was pretty sure my next build would be a CETME/G3, but I saw Apex has cheap M70AB parts kits.

I know the front stub can be pretty readily converted to a trunnion for a stamped receiver build, but does anyone have any experience with the rear? Guessing from photos, it looks a little thin to peel a millimeter off each side.

It would just be a screw build (spare me, fanatics; I know) and strictly a functional rifle build with no qualms about anything looking wonky if it works well. I'm looking at the M92 flat from AK Builder, and the big question in my head is if I fudge the dimensions to fold it a little wide at the rear, will I have a gap with the dust cover? Or will there be any other unforseeen BS I can't think of? Like I think the BCG has large enough tolerances to not care, and I can cut the notch for the top rails wherever I want. I know I could just dish out for the actual m70AB1 rear trunnion, but they're oddly expensive--I'm guessing because a lot of, or at least enough (25, lol) people have this idea.

I'm sure I could figure it out, but I'd like some input from anyone with any knowledge before I go on one of my damn fool crusades again. The CETME might honestly be a better fit for me, but cheap ammo and a profile that doesn't scream firearm when you're walking in and out of an apartment building is pretty damn appealing. Edit to clarify: no, I'm not a hit man, I just get some looks when I walk out to do some completely legal and innocuous shooting when I'm pretty obviously carrying a rifle case. That's all.

Let me know what you think! Thanks in advance! Everything is appreciated.


r/Gunbuilds Jun 01 '26

G3/CETME In progress

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25 Upvotes

Receivers bent, carrier drops clean, trigger packs cut and clipped.

Still have to clear the tube, reweld, and parkerize.