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Old 06-24-2019, 05:30 PM   #1
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Revision 4 of my Halo SMG

Edit: I totally put this in general instead of project guns... can someone move the thread for me?

Revision 3 and below... (https://www.airsoftsniperforum.com/3...niper-but.html)

Album: https://imgur.com/a/wF644V6



Full redesign from my previous M7 builds. Used a model that was pulled out of the actual game to create the body, though the stock tube that houses the HPA unit and mounting block for the magazine were made from scratch. Washed out some details during all the file conversions, but the general shape, form, and functionality are all there.

Like the actual game model, it's a side loader, though unlike the game model this is actually a bullpup. The hop up "chamber" is directly built into the stock of the gun, and uses two angled screws to apply pressure on the bucking. The design is one that I took inspiration off of the silverback SRS. While a lot of people dislike the double screw hop up design, it's actually 100% necessary for this build due to the side loading nature of the platform. Let me explain.

In a traditional rifle, the BB's are loaded up the feed tube, putting them directly in line with the hop up bucking. Any bb's pushing upwards from the magazine simply push the round in the chamber along the same axis which causes no issues. However, since this is a side loader, the bb's in the magazine actually push it against the right wall of the hop up chamber. When that round is loaded and fired, it's often loaded offset to the right and causes curving issues. With the double screw design, you can counteract the offset by applying more pressure to one side of the bucking. Basically, it's offsetting the offset if that makes any sense at all.

Compared to the previous versions, I also ditched the 100 round cyma AEP magazines. There were two main issues with these old 100 round aep mags, one being that they had terribly poor QC, and the other being that you couldn't reload the gun while there were still BB's in the magazine due to how they stacked up in the feed tube. At the time I built the original version of this platform, these AEP mags were pretty much the only option, but now that action army came out with these spiffy 50 rounders, I now have access to better feeding, better quality, and more realistic while still being usable, magazines. There's also a benefit of having much more compact magazines that won't ruin the proportions of the gun...

Performance wise, this thing is pretty great, if I'm allowed to humble-brag a little. It'll feed flawlessly through any weight BB, and even do upwards of 30 rounds per second. For realism's sake, I keep it at 20ish, but it's nice to know the platform can handle it. I can't give exact groupings and numbers, but it's a solid hitter out at those 200 feet distances with standard aeg limits. It'll definitely shoot farther than 200 feet, but anything beyond 210ish is a lob or overhop even if it's reasonably consistent. The suppressor is functional, and brings the gun down to a nice muted level. All in all, the gun's about the length of a SBR styled AR. It's a very fun gun to run, though if there's one downside, it's the fact that it's near impossible to reload off handed. Sorry lefties!

Specs:
Wolverine Gen 2 Inferno
Action Army 6.03 300mm VSR G-spec barrel
Maple leaf hybrid bucking
Action Army 50 round VSR-10 magazines
330 fps with 0.3G BBs @ 90 psi
3.1 pounds loaded weight

Function Demo:
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Last edited by whalesmash; 06-28-2019 at 02:39 PM.
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Old 06-25-2019, 04:59 PM   #2
wyz2285   wyz2285 is offline
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Cool!! I'm making also a 3D printed rifle but using a fusion engine.
What's the infill density you're using? I'm planning on using a main aluminium extrusion as "spine", inspired by the L96.
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Old 06-25-2019, 06:15 PM   #3
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I'm either using 10 or 15%. I don't think it's necessary to go higher than that. It's more important to have enough wall thickness such that a stray BB impact doesn't rupture the body. I'd love to see your build whenever it's done :)
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Old 06-27-2019, 05:21 AM   #4
wyz2285   wyz2285 is offline
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Still need to model the body and trigger group, but it already shoots (mag and barrel/hop unit already done) if I connect the wires.
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Old 06-27-2019, 12:15 PM   #5
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BTW I saw you video of the MP7 adapter. Consider insert a arrow shaft (normally 8mm OD 7mm ID, thin aluminium tube, should fit snugly) through the gas mag so the bbs ride in one line. It will make full auto 100% reliable. For me it was necessary because I short stroke.
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Last edited by wyz2285; 06-27-2019 at 12:17 PM.
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Old 08-29-2020, 02:17 AM   #6
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Not to necro an old build thread, but here's a one year update along with a soft refresh of the platform. Per usual, pictures first:









The one year refresh for this gun didn't change much from the aesthetics side of things, but does have some pretty big internal overhauls. The most notable change is the integration of the wraith CO2 system directly integrated into the grip of the gun. This is the same wraith co2 you would usually stick on a wolverine bolt, except I've replaced the pressure gauge with a plug and changed the 3.2mm macro line with a standard 6mm line. The stock was also updated with a dual source kit to allow both CO2 from the grip or HPA via remote line. I also updated the magazine latch mechanism to use a sliding catch instead of a spring actuated lever. There were some issues with the magazine popping out under the pressure of BB's feeding from the mag/nozzle cycling. Switches for safety/fire and semi/full auto were shifted forwards to make space for the in grip co2 layout. They were also changed to flatter laying electronic switches and shifted from vertical movement to horizontal movement for easier use while wearing gloves.

It's kind of hard to believe that it's already been a year since I first built this thing, and it's even more surprising to see it hold up so well. Perhaps it's time to start tooling up those aesthetics...
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Old 08-29-2020, 04:27 AM   #7
 
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Looks swank.
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Old 08-29-2020, 07:15 AM   #8
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That’s insane. I love it!! Do you ever have issues with the puncture point of the co2 adapter? Every now and then mine won’t fully puncture a cartridge and I have to re adjust it. I’m wondering if it’s just the cartridges I use.
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Old 08-29-2020, 09:33 AM   #9
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That looks super nice! I saw someone did something similar on reddit, but it was nowhere near as cool (they used some funky green plastic instead of black). Keep gracing us with your spectacular builds!
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Old 08-29-2020, 12:41 PM   #10
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Quote:
Originally Posted by Blind Sniper View Post
Thatís insane. I love it!! Do you ever have issues with the puncture point of the co2 adapter? Every now and then mine wonít fully puncture a cartridge and I have to re adjust it. Iím wondering if itís just the cartridges I use.
I've been sticking with the same brand of CO2 so I have not had any puncture issues just yet. I did notice that different cartridges differ in length by a few millimetres which can cause puncture problems though...
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Old 08-29-2020, 02:39 PM   #11
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Yea that’s what I figured. I thought about taking my spare cap and gluing a dime or some form of spacer in it. Then, if it doesn’t want to puncture I can just swap caps
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