Hybrid RTP Rails

[JimBobFett]

I feel like this rail would look pretty killer on a galactic z body...

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Damn, good call.

[JimBobFett]

Can the Ultra Mini 3 be made to AM/MM length? I would love to do this rail with a foregrip slot

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That's sort of what I was trying to do as well with the Deco Rail... I like the whole 'forget the foregrip' for most of my builds, but sometimes you want at least an AM/MM length mount. I have been pondering alternatives to the usual mount though too. I'm thinking Lego Technic... a slim, maybe 1/2" wide hunk of metal with cross drilled holes to run holes through like some actual gun rails. The only downside is that then the mounting hardware is exposed on the sides. Still, maybe an 'add on' was my first thought. Instead of changing the rail, drill & tap a hole in the existing rail on its front... sort of like a smaller version of a banjo bolt on an Autococker. Then make up some new grips that slide around the front and bolt on there.

I mean, overall, unless you have some rare VD foregrip, a DW CF, or one of Lc's tube foregrips, the selection of foregrips for Automags just plain sucks. Not that you really need a lot for a foregrip besides a pipe with a flange at one end, but there is a lot of potential there that usually goes overlooked.

[Apathetic_Chaos]

Yeah, I'm assuming those places you marked up would have fillets in them. That's just fine. It was getting late and I just ran out of time to put them all in. That's what I get for doing it at home on SketchUp rather than at work with Inventor.

I feel like this rail would look pretty killer on a galactic z body...

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[JimBobFett]

Many of those details cant be replicated on a milling machine, the design would translate into something close but much of the design is impossible. Here's a small example of what wont work in the design. I would need a lot of leeway in the concept to make it work.

Yeah, I'm assuming those places you marked up and just about all the inside corners would have fillets in them. That's just fine. It was getting late and I just ran out of time to put them all in. That's what I get for doing it at home on SketchUp rather than at work with Inventor. Do you think much else would be different? I tried to make it all 'squared off' with all the angles I once had replaced with 1/8" fillets. I didn't put the cross drilled holes on either.

So far the narrowest around the sear has been 3/4" or just under, but if the cross section is made into an inverted 'T' then the top of the rail along the body can shrink down to ~3/8" and then there isn't really any ULE milling left to be done on the inside. The foregrip mount needs to be 1" wide (or would 3/4" be enough?) to be stable for most grip mounts it seems, but the top can shrink down I figure... still need a little wider than the sear though for screw heads to get down into the slot.

Then, with all that narrowness, and to help support putting a foregrip mount back on, I widened the body around the bolt points to 1"... the front one really lending to the grip mount in front of it. Technically, the back valve support could be cut off like the Ultra Mini's but it just started looking like a 1920's hood ornament with it so I left it. I'm liking the whole asymmetric valve support. Overall just trying to take the skeletonized slim look of the Ultra Mini's to the extreme but then add back in a feature or two that might make it a lot more appealing to most.

[luke]

Can the Ultra Mini 3 be made to AM/MM length? I would love to do this rail with a foregrip slot

Sent you a PM.

[Apathetic_Chaos]

Two more JimBobFett inspired designs.

I've built out the small slug rails so what's in inventory is it for these.

Ultra Mini 3








Ultra Mini 4








Both of the rails weigh in at 1.1 oz. each.

Can the Ultra Mini 3 be made to AM/MM length? I would love to do this rail with a foregrip slot

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[luke]

Many of those details cant be replicated on a milling machine, the design would translate into something close but much of the design is impossible. Here's a small example of what wont work in the design. I would need a lot of leeway in the concept to make it work.

[JimBobFett]

Maybe something like this over the front frame screw support wings would look better... the general idea is there though. All the fillets can be done with a 1/4" ball tip bit.

Ooo, and Rocket Bunny Fenders for the Sear Pin, lol:


Almost looks like a 1920's hood ornament!

[JimBobFett]

I've been workin' on somethin' too. It's kinda funny how the Ultra Mini 3 is following a similar path it seems: I modified that RT length ultra-light design to get rid of all the straight angles and allow it to be either right angles or fillets for everything. It ended up looking rather "Art Deco" and I'm diggin it. Maybe add in those small (1/8"?) cross drilled holes and I think it would be a rather sharp piece. I narrowed the top width around the sear even more (3/8"!) since then you don't need to mill out the inside much at all and since the base is still 3/4" wide over the frame it should be plenty strong. Imagine how a ULE body would look on that!! If there are any tweaks just let me know but I think I want to get this made. Is this easier than the other one with all the angles? How much $$$?



The more I look at the foregrip mount I keep thinking it looks so close to a picatinny rail... I wonder if a hybrid picatinny slotted foregrip is possible. Sure would open up a world of foregrip options!


I think I'll call it the "DecoRail"

[luke]

Sure, there's 4 each in stock..

[JimBobFett]

Two more JimBobFett inspired designs.

I've built out the small slug rails so what's in inventory is it for these.

Ultra Mini 3








Ultra Mini 4








Both of the rails weigh in at 1.1 oz. each.

Ha! Just saw this now... take my money please! I just dropped $1200 this week on PB stuff and I don't want to be back in the dating scene though any time soon, so can I order those in a couple weeks? They do look slick.

[luke]

Two more JimBobFett inspired designs.

I've built out the small slug rails so what's in inventory is it for these.

Ultra Mini 3








Ultra Mini 4








Both of the rails weigh in at 1.1 oz. each.

[luke]

I got your nano mini down to 1.1 oz.

[JimBobFett]

This is a Gamma-8, it's 2.2oz and still very sturdy. Do they really need to be lighter than that?

Yes, yes they do; 1.3 oz., lol!

[JimBobFett]

It doesnt really translate in pictures, but I'm diggin it, I wish I had that setip 20 years ago.


Rail weighs 1.3 ounces.


I think the valve support is about right, shouldn't have any problems

Slickness. Yup... one of those "How come we haven't seen this before now?" things.