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Colt Single Action Hand Slot Stoning Kit - India Stone, Silversmith, Mf-414
Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.
$23.87
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SKU: 657414002
Overview
This kit is intended for cleaning up roughness inside a Single Action Army frame when tuning the action, with a focus on reducing cocking effort and perceived trigger pull without working on the critical trigger and hammer notches. It is especially relevant for first- and second-generation Colts, and for third-generation guns and clones with cast or roughly forged frames where internal rough spots can be more pronounced. The three-stone set includes the MF-414, MF-14, and HF-823 in a padded plastic box, giving the user a compact setup for hand-slot work and follow-up smoothing. For serious revolver owners and gunsmith-minded shooters, it offers a practical way to address internal drag points while staying within the intended tuning areas.
Why Hunters Choose the Brownells
Cleaning Up
Roughness inside the Single Action
Helps Reduce
Cocking effort and perceived trigger
Fits Hand
Slot for targeted access to
Includes Three
Stones for a complete hand-slot
Comes Padded
Plastic box for organized storage
Key Features
- Kit for cleaning up roughness inside Single Action Army frames
- Helps reduce cocking effort and perceived trigger pull
- Designed for light action work without touching trigger or hammer notches
- Includes three stones: MF-414, MF-14, and HF-823
- Supplied in a padded plastic box for storage
- MF-414 stone is sized to fit the hand slot
Best Used For
- For gunsmiths tuning Single Action Army revolvers and similar clones with rough internal frame surfaces.
- For owners of first- and second-generation Colts seeking a cleaner hand-slot fit during action work.
- For 3rd-generation Colt and clone users dealing with cast or roughly forged frame roughness.
- For experienced hobbyists performing careful action cleanup without touching critical trigger or hammer notches.
Specifications
| Dimensions | Approximate and may vary |
|---|---|
| Kit Contains | Three stones in padded plastic box: MF-414, MF-14 and HF-823 |
| Mf 14 Length | 4 in |
| Mf 14 Material | Medium India |
| Mf 14 Width | 1/4 in (6.3 mm) |
| Mf 414 Length | 4 in (10 cm) |
| Mf 414 Material | Medium India |
| Mf 414 Taper Thickness | 1/16 in (1.6 mm) |
| Mf 414 Thickness | 3/16 in (4.8 mm) |
| Mf 414 Width | 5/16 in (7.9 mm) |
Pros
- Designed for cleaning up roughness inside the Single Action Army frame
- Helps reduce cocking effort and perceived trigger pull
- Fits the hand slot for targeted access to hard-to-reach areas
- Includes three stones for a complete hand-slot stoning setup
- Comes in a padded plastic box for organized storage
Considerations & Trade-offs
- This is a specialized action-tuning kit for Single Action Army revolvers, so it is not a general-purpose stone set for broader firearm maintenance.
- The description emphasizes careful cleanup of roughness inside the frame; results depend on proper fitting and use rather than a simple drop-in application.
- It is intended to reduce cocking effort and perceived trigger pull without touching critical trigger/hammer notches, so it does not replace full action work where deeper correction is needed.
- Dimensions are listed as approximate and may vary, which matters when selecting stones for tight hand-slot work.
Suggested Comparisons
- Gun smithing stones
- Single-action revolver maintenance tools
- Firearm action polishing kits
Suggested Accessories
- Honing stone
- Gun cleaning kit
- Gunsmithing tools
- Bench block
Frequently Asked Questions
What is included in the Colt Single Action Hand Slot Stoning Kit?
The kit contains three stones in a padded plastic box: MF-414, MF-14, and HF-823.
What is this kit used for?
It is designed to clean up roughness inside the Single Action Army frame, especially in the hand slot, to help reduce cocking effort and lighten perceived trigger pull without touching the critical trigger/hammer notches.
Is this kit intended for original Colts or clones?
The description says it is well worth the effort on first- and second-generation Colts, and especially important on 3rd-generation Colts and clones with cast or roughly forged frames.
Does the product description specify exact dimensions for every stone?
No. The provided specs list dimensions for MF-414 and MF-14, but the dimensions are noted as approximate and may vary. The long description does not give a separate dimension listing for HF-823.
What does the long description recommend doing after using the MF-414 stone?
It recommends following with the HF-823 to make a slick, polished path for the hand, and using the MF-14 to round the nose of the hammer notch.