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Precision swaging dies for airgun slugs, .177 to .457

SOC kits, SlugMaster, the Freedom Series press and die sets, and aftermarket dies for Press-Slug and Corbin presses. Pick the die system that matches your press and calibre.

SOC, SlugMaster3–5 weeks

Other products4–6 weeks

With a press5–9 weeks

Ships byFedEx, DHL, UPS

Which die system is right for you?

You want to start simply: SOC kit

Makes fixed-weight slugs from lead wire on an arbor press. The simplest way to start. Configure a SOC kit.

You want to tune the weight: SlugMaster

Makes slugs of different grain weights with the same kit. You set the weight by turning the split guide, and the patented auto-bleed removes the need to trim. Configure a SlugMaster.

You make slugs in volume: Freedom Press

Our press for mass production, .177 to .357, around 10,000 to 15,000 slugs a week with its own Freedom Series die sets. See the Freedom Press or the die sets.

You already own a press

Press-Slug owners, with the standard or the Crown Kit dies, can install our Press-Slug compatible die set directly. Corbin owners can use our die sets for Corbin CSP-1/CSP-2 and Hydro with the GMI adapter.

One standard for every die system. SOC, SlugMaster and Freedom parts start from one tool steel, are machined to one tolerance, hardened to 50–52 HRC and checked on one set of inspection equipment. Accessories do not swap between die systems.

Still deciding?

The Product Finder narrows the range to the parts for your calibre and press. The Grain Calculator estimates slug weight from length, nose and base shape before you order.

Making swaging kits since 2020

For the last 6 years we have empowered shooters in the USA, Europe, Australia and beyond to make their own precision slugs. Some of them now make slugs commercially on GMI tools.

Join the GMI community

Need a size we do not list?

Send us your diameter and target grain weight and we will quote a die made for it.

Request a custom die

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