Design & fabrication · Detroit, Michigan
Made-to-order parts,
printed in Detroit.
A one-person American small business designing and 3D printing durable, useful gear — built to take real-world abuse, shipped straight from Detroit, and every piece carries our debossed logo.
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Grip Inserts
Store spare batteries and small parts inside your grip. Four models: CR2, CR123, Standard (bolt + firing pin + CR2032), and AR10.
$18
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Funk Buster
Baking soda + activated charcoal deodorizer in a refillable screw-top container. Three sizes for fridges, cars, dorms, and RVs.
From $7
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Grigri Tether Adapter
Press-fit tether point for the 3rd-gen Petzl Grigri. Never drop your belay device again. 2-pack with cord.
$5
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Carabiner Stays
Flexible 10-packs that keep carabiners from flipping on quickdraws and cams. Two sizes plus a rainbow cam-rack pack.
From $5
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Fujifilm Dial Toggle Adapter
Slips over the tiny mode-dial toggle and makes it easy to flip — even with gloves on. 4-pack.
$5
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Helmet Mount
Curved glue-on base for GoPro-style action cameras, shaped to hug helmet shells. 3-pack with hardware.
$6
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MOLLE Belt Adapter
Mount MOLLE pouches, holsters, and IFAKs on the everyday belt you already wear. Single or double column.
From $6
View product →About the shop
Detroit Prototype LLC is run by one maker in Detroit, Michigan. Each product is designed in-house and 3D printed to order — no overseas manufacturing, just dependable parts made a few at a time and shipped across the United States. Questions, custom requests, or a problem with an order? Email info@detroitprototype.com.