"What are the best slugs to shoot with my .30 cal GK1?"

We got you covered.

These swaged slugs are custom-made for the .30 cal GK1 and will shoot flawlessly.

Specifications (Flat Nose):

• Quantity: 150
• Design: Flat Base Flat Point
• Weight: 74 grain 
• Caliber: .304
• Length: 10.9mm

Specifications (Hollow Point):

• Quantity: 150
• Design: Flat Base Hollow Point
• Weight: 68 grain 
• Caliber: .304
• Length: 11mm

Compatibility: In May 2026, Huben changed the size of their .30 cal cylinders from .304 cal to .301 cal to better fit the most common .30 cal pellets and slugs.

These slugs are sized for .304 so they will fit the older Huben .30 cal GK1s and K1s, but they will not fit the newer GK1s and K1s

If you have a newer GK1 or K1 in the following serial # ranges, you should not buy these slugs:

• Full size GK1 .30 Cal: 30GK12026B04006 - 30GK12026B04043
• Mini GK1 .30 Cal: 30GK12026M04011 - 30GK12026M04038
• Synthetic K1 .30 Cal:  30K12026B04006 - 30K12026B04020
• Walnut K1 .30 Cal: 30K12026WS04001 - 30K12026WS04002

We will eventually get both .304 and .301 slugs so everyone will be covered!