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GundamGPO3 — RAR-556 Final

Published: 2010-04-11 06:01:26 +0000 UTC; Views: 3091; Favourites: 36; Downloads: 58
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Description Alright here it is guys. The final designation of this rifle is the RAR-556 (Reverse Action Rifle: Caliber 5.56mm). The number designation will change with caliber. As you can see I have shortened the rifle quite a bit, which gives it a much better profile and length. I took 67mm off the upper receiver length, and the barrel is 2 inches shorter at 16 inches.

For a rough comparison in weight and size, it would compare to the SIG 551. I will be rendering this in a few days with some accessories after I am done modeling some for it, but this is a nice profile screen shot so you guys can see the Final phase of this project.

The rifle is 100% complete as far as mechanical operation is concerned, however I have gone back and done some revisions on parts, and I am now thinking about modeling alternative accessories for it. Anyway, let me know what you guys think, as this will be the "official" model
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Comments: 21

primnull [2015-07-06 00:05:21 +0000 UTC]

sig 556?

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LoricTheMad [2010-08-12 16:21:04 +0000 UTC]

I came across this rifle entirely by accident, while searching dA for SG 55x series rifle pics. I've looked at a few of the pictures, and I like this very much. I would be interested in seeing what this looks like on the inside, as it seems that you've put a lot of time and effort into the design.

Couple questions though. I may be blind, but I can't see a magazine release. Is it in the same location as on the SG 551? My second question is kind of a two parter. With the charging handle; is it non-reciprocating, and is it ambidextrous (as in on both sides)?

Thanks for sharing a great rifle.

Cheers,

Loric

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GundamGPO3 In reply to LoricTheMad [2010-08-12 18:12:21 +0000 UTC]

Thanks, glad you like it I have a render of the fire control group visible, but the other internals are being patented, so I cannot show those off until I have them under full patent protection. The magazine release is a double paddle, contoured next to the trigger guard, so that the trigger finger may be extended to drop the mags while the other hand is grabbing a fresh one. The charging handle is nonreciprocating, and the entire rifle is 100% ambidextrous. Everything a right-handed shooter can do with this rifle, a left-handed shooter can mirror completely.

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LoricTheMad In reply to GundamGPO3 [2010-08-12 18:30:25 +0000 UTC]

I'm liking the ability to be fully abmidextrous, as I am left-handed in just about everything I do. Do the magazines rock in as with the SG55x series, FAL and AK?

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GundamGPO3 In reply to LoricTheMad [2010-08-12 20:26:13 +0000 UTC]

Nope, they slip in like an AR. this way they drop out quick for the new one to be thrown in.

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LoricTheMad In reply to GundamGPO3 [2010-08-12 21:26:58 +0000 UTC]

Neat, overall well thought out. I'd say this works favourably as a NATO answer to the AK-107/108 and AEK rifles.

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GundamGPO3 In reply to LoricTheMad [2010-08-13 02:52:24 +0000 UTC]

I would recommend going through the rest of my gallery and looking at the improvements since this pic. It's actually just called the RAR now. I've made it multi-caliber, and shortened the receiver by another 2.5 inches, so it can now accept down to a 13 inch barrel. And funny you mention they AK107/108 because that design principle is the main inspiration to this project

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Nolo84 [2010-04-12 16:26:33 +0000 UTC]

Stock looks less flimsy than the actual 556's.

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GundamGPO3 In reply to Nolo84 [2010-04-12 19:04:11 +0000 UTC]

I think the SIG 556 is an abomination personally.

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Nolo84 In reply to GundamGPO3 [2010-04-12 19:58:00 +0000 UTC]

Oh God yes.

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Seth45 [2010-04-11 12:03:30 +0000 UTC]

Really good work. But some info on the stock would be good, right or left folding, lenght adjustable?

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GundamGPO3 In reply to Seth45 [2010-04-11 14:32:59 +0000 UTC]

Well Seth, not to be a complete wise ass, but the picture itself gives away exactly what the stock does haha. It is hinged on the right, which means it will fold right, the length adjustment tab is just forward of the comb slider which elevates the comb for high mounted optics. The stem is made out of Aluminum alloy, and the "plastic" components are made out of high-density acrylic. Despite having "screws" on the outside that you an see in the 3 corners of the hollow area, they are actually rivets to strengthen the arcs from falling or bashing someone. So the stock is 100% solid acrylic, and the rivets go straight through to the other side.

If you're wondering how it locks, there is a little system I invented for it because I didn't want it to snap to an anchoring point on the receiver or fore-grip at all. If you look directly on the hinge, you'll notice a rectangular notch. When you close the stock, a tab flows into the notch and blocks off swinging motion to the stock. To release the stock, you slide the tab with a thumb plate and it swings free, back to the extended position.

Hope this answers all your questions regarding the stock

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Seth45 In reply to GundamGPO3 [2010-04-11 15:09:07 +0000 UTC]

The problem was that on the to of the joint between stock and receiver is a screw or bolt that looks similar to the hinge on the right so I thought it might be on the other side. And the lenght adjustment tab could have also been part of the cheek piece. I just wasn't completely sure.

But now that I've got all the fact one problem pops up in my mind: you can't fire the gun with the stock folded because the ejection port is blocked. I would think about a solution for this if you haven't already or else a foldable stock wouldn't be very useful. I'd suggest either a change of the stock design or a diffrent angle for the hinge that it folds under the ejection port.

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GundamGPO3 In reply to Seth45 [2010-04-11 15:34:32 +0000 UTC]

OOh!! I see what you're talking about now. That is actually a sling mount on the left side. Also the stock being folded does offer about .5 inches of clearance on the side for shells to eject, but you are correct about it being blocked horizontally for the most part. I've been doing some brain storming on that issue, but until I figure it out, It isn't recommended to shoot from folded stock position lol!

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GundamGPO3 In reply to GundamGPO3 [2010-04-11 15:53:21 +0000 UTC]

Actually, Seth, I just figured it out and it was actually a pretty simple modification. I was playing around with my SIG 551, and noticed that the bore axis is directly perpendicular to the top crest of the stock, which is where I wanted it on mine as well. I dropped the anchoring point of the stock 15mm and that gave it perfect clearance for shells to eject over it! I'll update this post with the pick as soon as I finish the comb riser. The angle got thrown off after dropping the stock that far down.

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GundamGPO3 In reply to GundamGPO3 [2010-04-11 16:32:25 +0000 UTC]

Ok here it is. I made a side by side so you can see the stock open and closed. The port appears to be covered a little at the bottom, but the shells are ejecting out at a high angle much like an AK, so they will fly clean over the stock without issue.

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ShengDaFlashPRo [2010-04-11 06:37:55 +0000 UTC]

Thats pretty darn amazing ! cant wait for a render and you should definitely give us an xray version

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GundamGPO3 In reply to ShengDaFlashPRo [2010-04-11 14:37:46 +0000 UTC]

I'm not going to post any pics of the internals publicly. If you would like to see the inside, I would be more than happy to e-mail it to you, as long as you respect my privacy wishes and not show it to anyone else. There are a few high-value patent designs/innovations in this rifle that I don't want stolen or leaked. So if you would like to see, just pm me with your e-mail address, and I'll send you it as long as you agree to the above

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ShengDaFlashPRo In reply to GundamGPO3 [2010-04-11 16:42:20 +0000 UTC]

oh no wonder!! you really seem extremely talented and that would defintitely explain the 'privacy'. the externals itself looks purely amazing. great work once again.

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GundamGPO3 In reply to ShengDaFlashPRo [2010-04-11 17:03:13 +0000 UTC]

Thanks man, I really appreciate that. That means you'll look forward to seeing it all dressed up with some fancy equipment after I model all that haha.

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ShengDaFlashPRo In reply to GundamGPO3 [2010-04-12 03:38:25 +0000 UTC]

hahahaha!! of course!!!! that should look good xDD

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