Gunbuilder

Essential tool for cutting grooves for an enclosed track Oversized by .02" to allow for shaft clearance Hardened steel for smooth precise cuts Des...

Neptonics is your source for your spearfishing gear, and we are very proud to offer our 100% Synthetic Muzzle Bungees. Made from 100% Synthetic Rub...

Essential tool for cutting grooves for an enclosed track Oversized by .02" to allow for shaft clearance Hardened steel for smooth precise cuts Des...

Essential tool for cutting grooves for an enclosed track Oversized by .02" to allow for shaft clearance Hardened steel for smooth precise cuts Des...

The most powerful 16mm (5/8 in.) rubber available with 380% stretch Not harder to load, just snappier than any other rubber, giving your shaft mor...

Great composite handles to outfit your new speargun. It is extremely durable and has a strong grip made from a dense polymer composite, and it is c...

The disco ball flasher emits more light than any other flasher we have used. Our spearfishing disco flasher ball has more than 200 mirrors that be...

K.O. Reusable Powerheads are the perfect underwater protection device for any freediver or SCUBA diver. This is especially true when spearfishing i...

Purchasing rubber in bulk is a great way to save money and re-rig multiple guns We recommend changing speargun bands every 6 months to a year depe...

AR Speargun Mid-Handle kit by Neptonics. The AR-15 Speargun handle offers the top attributes avid speargun builders are looking for. Simply cut yo...

Have you ever been in a situation where you wish you have more than one shot? The Neptonics Double Trigger Mechanism lets you have two shots and fi...

All Neptonics speargun parts are built in California by us. This is important because we control the quality every step of the way. Engineering, M...

The Neptonics Fish Scaler is made from 316ss. If you like cooking whole fish this is a must have. Makes quick work of scaling your catch.

Neptonics presents an innovative, smart breakaway adapter for your floatlines. This breakaway adapter contains 1400lb, fully braided Spectra core t...

Most likely the most notable advancement in spearfishing gear this century, the floatline clutch from Neptonics is an amazing piece of equipme...

Neptonics Pinch Weight Mold for the do it yourself diver. This mold produces two lead weights with each pour. Each weight is 2lbs. Clam shell mold ...

The Neptonics push rod retainer is an essential component for every mid-handle speargun. The push rod retainer holds the push rod in place that con...

The Neptonics Reef Speargun Trigger Mechanism is the most tried-and-true mech on the market. Made out of 100% stainless steel in our California wo...

Our Roller Kit can be mounted flush on your speargun. The Double Roller Stainless Steel bracket has two 1/4" pins that anchors into your wood spear...

Slide rings are an essential component in a slip-tip setup Serves as the anchor point for the slip-tip spectra or wire Made of solid stainless ste...

Here at Neptonics we pride ourselves in having a wide variety of different spearfishing rubber available for any of your spearfishing needs. We hav...

Neptonic Systems now offers a great selection of premium speargun shafts, in stock and ready to ship! These shafts work with any type of American m...

The Neptonics Muzzle Bungee is made from 100% synthetic rubber. These bungees will not crack or decay like other muzzle bungees. Ultimately, this i...

Our Tuna Speargun Trigger Mechanism is awesome! The housing is still machined out of a solid stainless steel and fully-rounded ends make it a breez...

The Neptonics stainless steel Belt Reel Mount comes ready to use. All you need to do is add any existing reel you have. Use an extra reel you have ...

The Neptonics insertion tool allows you to easily insert wishbones into band material to make your own power bands. This tool is ideal for any of t...

The Neptonics Speargun Reverse Trigger Mechanism is the most popular speargun trigger mechanism we offer. It has the durability of our other mech ...