Accessories and ammunition

The pump and slugs Huben makes itself. No other brands or third-party products appear on this page.

01

Huben HB35

Hand pump

A light hand pump you can take to the range.

A hand pump that fills up to 350 bar, with a folding foot plate and folding handle. Closed it is 620 mm long, so it fits in a bag.

Length	620 mm closed, 1103 mm open
Weight	1.28 kg
Working pressure	35 MPa (350 bar, 5075 psi)
Foot plate	Folding
Handle	Folding
Outlet thread	M10×1
In the box	Huben fill probe, spare parts

How to use it

• The factory designed the HB35 for the K1. It is especially handy with small-tube pistols like the GK1 and GK1 Mini: the GK1's 85 cc tube reaches 320-340 bar in 60-80 strokes, so there is no need to carry a dive tank to the range.
• The airguns' tubes are filled to 350 bar at most, and that is also the pump's limit. Watch the gauge while filling and do not go past 350 bar.
• The K1's tube is large (292 ml), so filling it by pump takes more strokes. Being semi-automatic, the K1 uses air quickly; the pump is fine for calm, single shots, but if you shoot a lot and fast, a dive tank is more comfortable.
• At 620 mm closed, the pump fits in a bag. The foot plate and handle fold. The pump locks while the bleed valve is open, so it does not open by itself in transport. The milled fins on the body are there to shed heat.
• The pump comes with a fill probe that fits Huben airguns, and spare parts. The outlet thread is M10×1; if you want to fit a female Foster coupling, choose one that matches this thread.

02

Huben Peanut

Slug (solid ammunition)

Huben's own .22 slug.

A 5.5 mm slug made for Huben, 250 to a tin.

Calibre	5.5 mm (.22)
Weight	2.16 g (33.33 grain)
Type	Boat-tail slug
Ballistic coefficient (BC)	0.185
In the tin	250

How to use it

• The Peanut is a traditionally shaped slug with a tapered (boat-tail) back. Three rings on the body reduce friction, and the ballistic coefficient is 0.185. It was designed for the Huben K1. Huben's first slugs were made by hand; the Peanut is mass-produced and better made than the old ones.
• Huben airguns pass the slug from inside the magazine into the barrel, so they want slightly larger slugs than normal pellets. The longest round that fits the magazine is 11 mm.
• Load the magazine in the gun: lift the lever, push the slugs in one by one, then lower the lever slowly with your finger without letting go.
• Every barrel likes different ammunition. When you start with slugs, try a few shots and see how your airgun groups.