Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
Product Information
The Mares Sten Speargun is a pneumatic spearfishing gun built around a 13 mm internal barrel and an 8 mm threaded rod, offered in 41 cm, 58 cm, and 70 cm lengths with NP or WP power regulation. Mares designs the Sten for high firing speed while maintaining excellent penetration even against large prey.
Who it is for
The Sten suits spearfishing divers who want a pneumatic gun with precision, power, and reliability across different hunting conditions. The Sten is offered in 41 cm (NP), 58 cm (WP), and 70 cm (WP) versions.
Key details
- 40 mm outer barrel
- 13 mm internal barrel
- 8 mm threaded rod/shaft
- Two-piece head
- Reinforced nose cone with steel line guide
- Ergonomic handle with white grip for increased visibility
- Side line releaser
- Manual inject system
Compatibility and sizing
The Sten is available in three lengths: 41 cm (NP power regulation), 58 cm (WP power regulation), and 70 cm (WP power regulation), all under Mares product code 413110 and length/power designation 041058070 NPWP.
DiveCatalog.com is an authorized Mares dealer and a dive shop in Irvine, California since 2003. Call or chat with us if you have questions about which Sten length or power regulation is the right fit for your spearfishing needs.
- 40 mm outer barrel forms the body of this pneumatic speargun.
- 13 mm internal barrel as specified by Mares.
- 8 mm threaded rod as specified by Mares.
- Two-piece head construction.
- Reinforced nose cone and steel line guide at the muzzle.
- Ergonomic handle with white grip for increased visibility.
- Side line releaser lets you manage the shooting line during a hunt.
- Manual inject system allows the diver to control pneumatic pressure.
- High firing speed is engineered to maintain excellent penetration even for large prey.
- Three length options (41 cm, 58 cm, 70 cm) with NP or WP power regulation to match different hunting styles.
| Code | 413110 |
| Internal barrel | 13 mm |
| Rod/Shaft | 8 mm, threaded |
| Outer barrel | 40 mm |
| Power regulation | NPWP |
| Length code | 041058070 |
| Available lengths | 41 cm, 58 cm, 70 cm |
| Handle | Ergonomic |
| Side line releaser | Yes |
| Cone with steel line guide | Yes |
| Manual inject | Yes |
⚠️ WARNING: This product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.
Frequently Asked Questions
What size Mares Sten speargun should I choose?
The Mares Sten comes in three lengths: 41 cm with NP power regulation, and 58 cm or 70 cm with WP power regulation. The Sten comes in 41 cm (NP), 58 cm (WP), and 70 cm (WP); choose the length that fits your typical hunting conditions. Choose based on your typical hunting conditions and target species.
What is the internal barrel and shaft diameter of the Mares Sten speargun?
The Mares Sten has a 13 mm internal barrel and an 8 mm threaded rod, with a 40 mm outer barrel. The Mares Sten has a 13 mm internal barrel, an 8 mm threaded rod, and a 40 mm outer barrel.
Is the Mares Sten speargun powerful enough for large prey?
Yes. Mares states the Sten delivers high firing speed while maintaining excellent penetration even for large prey.
What does the NP and WP designation mean on the Mares Sten speargun?
NP and WP are the manufacturer's power regulation designations for the Sten line. The 41 cm model is offered as NP, while the 58 cm and 70 cm models are offered as WP, corresponding to Mares' length and power code 041058070 NPWP.














