Customer notice: Small-batch CNC production — limited quantities available.


One (1) CNC-machined Hammer Weight & Pre-loaded Spring Guide

Improve power, consistency, and tuning control — with a simple drop-in upgrade.

Take your airgun to the next level with our precision CNC-machined hammer guides. Designed and manufactured in the UK, these components let you fine-tune your hammer system for smoother operation, tighter groups, and improved shot stability — whether you shoot pellets or slugs.



Why shooters love these guides

  • Stronger, smoother hammer strike for more consistent velocities

  • Improved shot-to-shot consistency (tighter groups at all ranges)

  • Better tuning control for slugs and heavier ammo

  • Faster lock time for reduced shooter error

  • No permanent modifications — quick, simple drop-in installation

  • CNC-machined in the UK from strong, corrosion-resistant materials



Choose how you want to tune

These guides can be installed in two ways, depending on the result you want:

1. Hammer Weight (front of spring)

For shooters who want more momentum behind the hammer.

  • Adds mass for a stronger, smoother hammer strike

  • Holds the valve open slightly longer for increased airflow

  • Helps maintain consistent power with heavier ammo

Best for: slug shooters, hunting, or anyone wanting more punch.


2. Spring Pre-Load (rear of spring)

For shooters who want crisp, repeatable performance.

  • Adds tension for faster lock time

  • Improves shot-to-shot consistency

  • Helps tune your gun to a specific pellet or slug

Best for: precision shooting, competition, or maximising consistency.



Easy Installation — No Skill Required

  • Drop-in fit — no cutting, drilling, or permanent changes

  • Takes only a few minutes

  • Works with all airgun calibres (.177–.30)

  • Compatible with standard hammer springs

Simply install at the front (weight) or rear (pre-load) depending on your tuning goals.



Availability & pricing

We’ve kept prices as low as possible, but with material and tooling costs continuing to rise, we will eventually need to increase prices on future batches. So it’s worth grabbing one now while they’re still at the lower price.



Compatibility

✔ Crosman 1377

✔ Crosman 1322

✔ Crosman 2240

✔ Crosman 2250

✔ Crosman 2260

✔ Crosman 2289

(all calibres)

Based on extensive customer feedback and real-world testing.



Pre-Load/Weight Options (Grams)

  • 1mm – 4.20g

  • 2mm – 4.40g

  • 3mm – 4.64g

  • 4mm – 4.83g

  • 5mm – 4.98g


Which size should you choose?

There’s no universal “best” guide — every airgun is slightly different.
Most shooters pick 2–3 sizes to find the perfect setup for their pellet/slug and tune.
For best results, measure your velocity before and after using a chronograph.

  • Important: Always ensure your setup remains within local power limits.



Need something custom?

We also design and CNC-machine bespoke airgun components.
If you need a specific size, weight, or new idea — we can build it.