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

Compact “Little Fatty” bolt upgrade for crosman airguns

Improve handling, reduce cocking effort, and modernise the feel of your Crosman airgun with our compact “Little Fatty” bolt upgrade.

Designed to replace the standard bolt on compatible Crosman platforms, this upgrade shortens the exposed bolt length while providing a more positive, comfortable grip during cocking. The revised position improves leverage, helping to reduce perceived cocking effort while giving the action a more compact, controlled feel.

Manufactured to fit M4‑threaded bolt probes, this upgrade is compatible with popular aftermarket steel breech probes, including those supplied by GMAC (see listing photos for reference).

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 (1998–present)

✔ Crosman 1322 (1998–present)

✔ Crosman 2240

✔ Crosman 2250

✔ Crosman 2260

✔ Crosman 2289

Fits Crosman airguns using an M4‑threaded bolt probe.
Compatible with aftermarket steel breech probes (e.g. GMAC).

Key features

• Compact “Little Fatty” bolt design
  
  
• Approx. 10 mm reduced bolt protrusion for a cleaner, more compact profile
  
  
• Improved bolt position for better leverage and smoother cocking
  
  
• Positive, tactile feel when operating the action
  
  
• Direct replacement — no permanent modifications required
  
  
• Designed for reliability and daily use

Benefits customers care about

• Reduced cocking effort through improved hand position
  
  
• More compact, streamlined bolt profile
  
  
• Improved handling and control during operation
  
  
• Simple upgrade with noticeable functional improvement
  
  
• Ideal for shooters who want a cleaner, more ergonomic setup

Installation notes

• Simple drop‑in installation
  
  
• No gunsmithing required
  
  
• Installs in minutes using no tools
  
  

Ensure your existing bolt probe uses an M4 thread before ordering.

Need something custom?

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