User Panel
I kinda lost all ambition after mine mildly blew up
I may return to it one of these days I was working on a thump n grind at the time too... haven't touched it since I'm working on a bidens bane upper and a scarlot now... I just went back to regular guns |
|
Quoted: LOL, I use 3D builder more than I'd like to admit. It's really good for jamming stuff together and hollowing stuff out, which is the bulk of how I design.... I'm using Polymaker and I like it a lot. I'm printing at 160/100 - which is all my i3 Mega S will do. My mega X will do 150/90 - and it's... okay? It's in an improvised welding blanket enclosure and I still get some warping and bed adhesion issues. I haven't had significant issues with layer adhesion, but I also try to be conscious of that when I design stuff - you'll note in my reinforced receiver for this I stuck a screw through straight down through the top- it holds the unlock lever in place but also reinforces the whole top section across the layer grain. I've been in some development groups for hi-low shells and am working on my own based on purple ramsets, which is exposing some other weak links in this design. I'm working on a MAJOR overhaul right now that converts the hammer system to a beefy inline spring contained in the stock instead of an AR hammer spring, which requires a lot reinforcement and a redesign of the stock lockup system. I'm also working on making the stock connection joints a dovetail system across the axis of recoil. Give me a few weeks to prototype and test and I'll drop the files. View Quote View All Quotes View All Quotes Quoted: Quoted: Nice to see someone else getting use from ms 3d builder! How are you finding ASA? I did some form futura apollox and it was ok but the layer adhesion was really bad to the point that layers would break off so cleanly they looked like top layers. LOL, I use 3D builder more than I'd like to admit. It's really good for jamming stuff together and hollowing stuff out, which is the bulk of how I design.... I'm using Polymaker and I like it a lot. I'm printing at 160/100 - which is all my i3 Mega S will do. My mega X will do 150/90 - and it's... okay? It's in an improvised welding blanket enclosure and I still get some warping and bed adhesion issues. I haven't had significant issues with layer adhesion, but I also try to be conscious of that when I design stuff - you'll note in my reinforced receiver for this I stuck a screw through straight down through the top- it holds the unlock lever in place but also reinforces the whole top section across the layer grain. I've been in some development groups for hi-low shells and am working on my own based on purple ramsets, which is exposing some other weak links in this design. I'm working on a MAJOR overhaul right now that converts the hammer system to a beefy inline spring contained in the stock instead of an AR hammer spring, which requires a lot reinforcement and a redesign of the stock lockup system. I'm also working on making the stock connection joints a dovetail system across the axis of recoil. Give me a few weeks to prototype and test and I'll drop the files. |
|
|
|
Quoted: That's true, but make sure it's above looking cool. View Quote View All Quotes View All Quotes Quoted: Quoted: Quoted: This sounds really sketchy, guys. Y'all be careful. Safety 3rd ! That's true, but make sure it's above looking cool. Have Fun Look Cool Be Safe |
|
Mine is still in one piece, but haven't had much time to mess with it lately.
|
|
|
Quoted: Update: getting there. Need to trim the barrel tube and buy hardware. I think I'm getting somewhere! https://i.ibb.co/z2hGGgP/20221129-103307.jpg View Quote That's looking good!! |
|
Quoted: That's looking good!! View Quote Man I went and downloaded your new parts pack too, if this receiver breaks on me I'm going to upgrade to that. I just don't feel like tying my printer up for 2 days to print another one when I feel like I'm getting close to being able to use this one. |
|
I actually was planning to use ramsets out of the gate, probably red instead of purple until I see how it holds up.
|
|
Quoted: I actually was planning to use ramsets out of the gate, probably red instead of purple until I see how it holds up. View Quote I just dropped the shell design that I'm currently working with on the sea (NPTShells) . I took a screw apart shell and set it up to accept a 1/4" automotive NPT fitting, chamber the NPT stem for the ramsets and epoxy it into the shell base. Then either use the standalone shell body, or epoxy the female hybrid portion into your 1-1/2 brass tube. I've put close to 100 rounds through one of my bases with no issues at all and no discernible wear to it or the main shell body. There are a few of us developing these as hi-low setups, with 1/4" NPT plugs with various vents, burst disks, etc. NPT Female Automotive fittings: NPT Automotive Fittings Brass for hybrid shell body - you'll want a way to trim to length, I like to use a pipe cutter and chamfer after: Brass for Hybrid Shells Plugs - not fully developed territory so use your own judgement: Hex Plug Solid Extended Plug |
|
This may be a dumb question, but what is a "hi-low" round/projectile?
|
|
Quoted: This may be a dumb question, but what is a "hi-low" round/projectile? View Quote The case of the round essentially has a chamber built into the base of the case, in which the charge is ignited by the primer. The pressure in the chamber rapidly exceeds the burst pressure of a plug in the chamber, rupturing the plug and allowing the High pressure gas rush into the empty Low pressure void behind the round. This kicks the projectile out of the bbl w/o requiring high pressure gun bbls, so you can use aluminum, what have you. |
|
how do you add the washer to prevent primer blow out to the breach face ? its listed in the PDF but never is addressed thank you in advance
|
|
Quoted: how do you add the washer to prevent primer blow out to the breach face ? its listed in the PDF but never is addressed thank you in advance View Quote I think most folks are epoxying them. I didn't use one at all and didn't have much trouble with black powder loads - but when I started getting into higher charges, smokeless, and hi-low I did away with the plastic breech face altogether and started making them out of 6061 AL. |
|
Ugh looks like my new "good" receiver is warped in the trigger area in a way which doesn't allow the trigger to function.
I might be printing the Inline Ignition receiver after all, not that it's a bad thing (other than the use of an entire spool to finally get a good receiver). I think I have my ducks in a row now so hopefully it won't lift and fail like the other 2. Going to print on a raft and probably slow print speed way down so this one actually turns out. |
|
I have this almost complete. does anyone a link to how to load the shells ? https://link.shutterfly.com/HbFWxWbWAvb |
|
Can't link to it here, but in the same place you got the print files there should be a 37mm ammo how-to.
|
|
There's also a couple youtube videos about how to make 37mm loads.
|
|
What epoxy do you guys recommend for the barrel? Preferably something available at Ace/Menards/HD
|
|
I need to dust mine off and do some more playing.
As for epoxy... Failed To Load Product Data |
|
I'm really excited because I'm so close. I just need to finish cut the barrel and actually assemble everything.
|
|
@arr199
What spring do you recommend to use with the Inline Ignition hammer? I just realized the hammer doesn't work with the standard AR spring. |
|
Bump.
Dusted mine off today and fired a round or two, then the firing pin washer popped out, and I started getting light strikes again. It would be nice to reach a point where it just worked, even 90% of the time would be awesome. Seems I get a round or two fired, then something craps out. |
|
Yeah I can't wait to actually FIRE mine, I've gotten it to the point that it is reliable with rimfire blanks (.22LR with bullet removed) but I don't really have anywhere to actually fire off a chalk round with the Ramset.
|
|
Quoted: @arr199 What spring do you recommend to use with the Inline Ignition hammer? I just realized the hammer doesn't work with the standard AR spring. View Quote Sorry for the delay on this! It'll take a regular hammer and AR spring, and that's honestly what I recommend unless you're using small rifle primers or ramsets and not getting enough power from that. The inline system is powerful, but it can be finicky, and I ended up cranking mine up too strong and breaking a bunch of stuff. I still recommend that receiver and stock setup - it's backwards compatible and a lot tougher in every dimension. Gorgeous build btw! I used 1 and a half of these: https://www.amazon.com/gp/product/B000BQWOLG/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 With a screw/nut arrangement in the bottom of the cavity to fine tune spring pretension like this: |
|
Quoted: Sorry for the delay on this! It'll take a regular hammer and AR spring, and that's honestly what I recommend unless you're using small rifle primers or ramsets and not getting enough power from that. The inline system is powerful, but it can be finicky, and I ended up cranking mine up too strong and breaking a bunch of stuff. I still recommend that receiver and stock setup - it's backwards compatible and a lot tougher in every dimension. Gorgeous build btw! I used 1 and a half of these: https://www.amazon.com/gp/product/B000BQWOLG/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 With a screw/nut arrangement in the bottom of the cavity to fine tune spring pretension like this: https://i.imgur.com/PzDfzC1.png View Quote |
|
Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. One new winner* is announced every week!
You will receive an email every Friday morning featuring the latest chatter from the hottest topics, breaking news surrounding legislation, as well as exclusive deals only available to ARFCOM email subscribers.
AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types.
From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm.
Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more.
Copyright © 1996-2024 AR15.COM LLC. All Rights Reserved.
Any use of this content without express written consent is prohibited.
AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own.