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    Ultralight Ultralight Rifles

    I 3d printed a mold and did a wet layup with carbon fiber fabric. If you want to use a tube and plate, I would get a 28mm ID tube with around a 2mm wall thickness. The max milspec for rifle reciver extensions is 1.115", which is just a hair over 28 mm, you might have to wrap sand paper around a...
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    Ultralight Ultralight Rifles

    My carbon fiber imitation of the farrow tech after shaping and with a shortened 1/4-28 bolt is 32 grams. I'm printing a revised edition currently and will post those files if that's a smother layup.
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    Ultralight Ultralight Rifles

    Depends on what loads and temps it will be subjected to. Basically every polymer lower is Nylon, and nylon is notoriously difficult to bond. But this one is purpose built for it, though results may vary. I haven't used this exact flavor, but loctites industrial stuff is the gold standard. You'll...
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    Ultralight Ultralight Rifles

    You could easily do that and it would be still stronger than those farrowtech ones. Just build a fillet of thickened epoxy along each seam where you bond them together and it would be plenty strong.
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    Ultralight Ultralight Rifles

    No, I just used the rifle reciver extension as the core, after building up a layer of release agent and putting modeling clay around the end boss, those prints are the mold for a carbon fiber layup. After people poster their farrowtech stocks breaking I figured I'd try making something similar...
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    Ultralight Ultralight Rifles

    It's 3 part 3d printed mold split along the long axis of it on either side of the webbing peice with an endcap where the butplate is formed, I need to make some changes to the model when I get time and I'll share it with anyone that wants it, I had to do too much sanding for fitting it together...
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    Ultralight Ultralight Rifles

    Prototype carbon fiber copy of the farrowtech with the flashing removed. I'll probably make some mold changes and redo it after the holidays. It's exactly 40g as it sits.
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    Ultralight Ultralight Rifles

    It's been awhile since I pulled any galvanic charts, but any time magnesium gets involved it like to corrode. Their exact alloy isn't disclosed, it's probably less of a deal than I'm making, but I personally avoid magnesium things after having to work with magnesium in a work setting.
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    Ultralight Ultralight Rifles

    The spikes seems to occupy the sweet spot in weight vs preformance. The Fostech is magnesium, which really likes to corrode, especially when there's a chance for galvanic situations, like where the barrel, barrel nut and reciver all meet up. And the polymer ones that are lighter than the spikes...
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    Ultralight Ultralight Rifles

    OK, I want to know, IS a sub 3lb rifle thats not an SBR even possible?
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    Ultralight Ultralight Rifles

    What all ones have you shot with? I'm trying to armchair min/max possible combos while I wait to hear back if someone can buy a 6mm max or 6mm mongoose in a pencil profile barrel from their respective mfgs.
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    Ultralight Ultralight Rifles

    Have you messed with the 90gr eld-x yet?
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    Ultralight Ultralight Rifles

    Tempting, wonder how much it would cost to have it turned down to a pencil profile?
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    Ultralight Ultralight Rifles

    The max is based off of the 350 legend, so you just have to fireform, bci, the makers of the 6 max also sell brass. But I haven't seen a reamer print for it. It's a rebated rim case, but nowhere near as extreme as what the 22 nosler was.
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    Ultralight Ultralight Rifles

    Not to further stir the pot, but did anyone ever end up doing a 6mm max barrel? Near same case volume as 6 arc sounds interesting. The numbers for it and the 90gr eld-x sounds like a really serious contender to 223 77gr tmk combo.
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    Ultralight Ultralight Rifles

    No worries, was that with the tube or the bare plastic part?
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    Ultralight Ultralight Rifles

    Can you weigh the farrow tech stock by itself? They don't seem to list the weight on their site
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    Ultralight Ultralight Rifles

    As a heads up for anyone looking, eurooptic has the burris 3x and 5x prism sights going for under $200 right now. They look very similar to the primary arms ones, and list very similar weights.
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    Ultralight Ultralight Rifles

    is the empty buffer lighter than the taccom plastic buffer? Did you need to use a reduced power buffer spring?
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    Ultralight Ultralight Rifles

    Yeah but the 3x acogs are sub 6oz. If an a1 slick side is as light as a regular one, even having it milled for the solo bolt might be the lightest magnified optic route. It's a bit out there of a solution I know, but in another life I carried around an a2 with a CompM2 on a gooseneck mount and...

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