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AJMX Bowie, Mk. IV by DaveLuck AJMX Bowie, Mk. IV by DaveLuck
The Mark IV solves a couple issues I'd seen with the original AJMX Bowies.

The point on this iteration has been dropped to place the tip in line with the axis formed by the curling of the fingers for better control over the point of the knife while using a saber or modified saber grip, and like the later versions of the Mark I, have a fuller appear on both sides. The other thing I did with this version was to add serrations along half the length of the straight section of the blade, which are mirrored - the grinds for both of them appear on both sides, unlike the serration on the top.

Material specifications since the last iteration have not changed; the blade will still be made of CPM S30V, or if S30V isn't available, AISI D2 Tool Steel as a low-cost alternative, along with EMS Grivory GVX-7H Polyphthalamide handle scales and sheath parts, and SAE 15-5 stainless steel fasteners. For a while I'd considered some odd or unusual materials, like Monel, Iconel, Stellite, Tungsten Carbide or Zirconium, but until I find something that provides just the right combination of the traits I need, I'll stick with steel.

Updated on the 14th of January!

I added the sheath and another view. The sheath is made of the same EMS Grivory GVX-7H Glass-reinforced Polypthalamide plastic specified for the handles, designed as a 1-piece shell for extra strength, and the mounting holes are reinforced by steel grommets. The one-piece shell completely eliminates the weak points found at the welts, and the strap buttons (here they're only shown as domes, though) are instead 1/4 anchors that are molded directly into the Polypthalamide, then the strap buttons (here shown as round domes) screw directly onto them. When I designed the sheath I realized it would be possible to mold it out of an entire, single piece of plastic by turning the opening of the sheath to the core end of the mold.

Unlike previous designs, the sheath is designed to fit the exact profile of the blade except where it would require an undercut for a tighter, smoother, snugger fit, and is held in by a single thumb strap (this is not shown on the model).

Note the lack of a drop loop seen on the earlier models. Instead of relying on a condura drop platform permanently stitched onto a small, molded loop that could break off or snap, the holes are spaced to be compatible with Milspec MOLLE by simply running some nylon paracord through them and the loops of the MOLLE webbing, so it can be mounted on drop leg platforms or ankle platforms for a more natural and easier draw.

I've drawn out sketches for mold plates and cold runner system for it with a heelblock system for molding the undercuts that form the holes, but I haven't committed it to CAD yet and probably won't release those on the internet.

Further update January 17th, 2011
Changed around a number of the views, and more importantly, I also changed the way the grind terminates near the hilt of the blade. The older versions used a simple 1/8" runout to simplify grinding, but I realized with the improved grind, this made things worse. So I angled the runout and used a much larger radius. This makes the grinding slightly easier but also more importantly makes the blade a bit stronger there.
:iconbobafettdk:
bobafettdk Featured By Owner Feb 2, 2011  Hobbyist Artisan Crafter
when is it going on the marked?
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:icondaveluck:
DaveLuck Featured By Owner Feb 3, 2011
On the market? Probably not for a long while yet.
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:iconbobafettdk:
bobafettdk Featured By Owner Feb 4, 2011  Hobbyist Artisan Crafter
damn...
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Submitted on
January 12, 2011
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