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SERIES II STONING FIXTURE Reviews & Ratings

Eliminates the guesswork and gives an accurate, repeatable method to achieve a crisp, clean-breaking trigger pull on semi-automatic firearms. Individual, easy-to-change Adapters attach to a precision-ground indexing elevator column and clamps the hammer in the right position for correct stoning with the specially ground Series II India Stone. Adjustable design lets you change hammer angle to meet the shooters’ precise needs. Series II India Stone required for use. Purchase separately. Universal Adapter (described below) adds incredible versatility.

SPECS: Steel, blued, precision ground and hardened. 5" (12.7cm) 4" (10cm) high, 3" (7.6cm) wide. Fixture includes 1 Adapter, hammer and sear clamp, three Allen wrenches and instructions. .154" Adapter fits AR-15/M16 with .154" dia. hammer and trigger pins. .173" Adapter fits Colt Commercial AR-15 only.

See all of our AR15s and AR15 parts here.

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Reviews Summary

Overall, customers appreciate the high quality and precision of the Series II Stoning Fixture, noting it as an essential tool for professional gunsmiths. However, several reviewers highlight frustrations with unclear instructions and a steep learning curve, suggesting that the fixture may be best suited for those with experience in gunsmithing.

What Reviewers Are Saying

Product Quality

60%

Many reviewers commend the series II stoning fixture for its robust construction and precision, indicating that it serves as a reliable tool for serious gunsmiths. Users noted that, despite its challenges, it ultimately performs exceptionally well when set up correctly.

Instructions and Learning Curve

53%

A common point of concern among reviewers is the poor quality of the instructions that accompany the fixture. Many found them confusing or lacking detail, contributing to a steep learning curve. Several users recommended additional guides or videos to assist in the setup process.

Target Audience

40%

Reviewers generally agree that this fixture is tailored towards skilled professional gunsmiths rather than hobbyists. Those with prior experience noted that they found it much more effective, while less experienced users often felt overwhelmed or frustrated with the setup and usage.

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Great Tool- How do you use it?

The first reviewer got this exactly right. This is a heavy, solid tool, with great adjustments (height has ball detent). Don't expect to be able to make this work from the instructions. They're not much help. e.g. Instructions referred to index mark on adapter that wasn't there. Steep learning curve is right. I t took me several months, working sporadically to get this thing to work. If it hadn't been for a photo of a sear mounted on it I found online, I might have still been trying to figure it out. Someone needs to make a video of how to use this great tool. That being said, this tool does a perfect job. Well worth the money.

Very nice, but somewhat complicated

This fixture is great if you have several (a dozen or more) triggers that need stoning, therefore its best for the gunsmith and not the casual hobbist. It does take some getting used to, but the instructions are clear, and practice improves proffiency. Specifically, this fixture allows for a even flat stone with jigs that keep stones and parts in the same position, eliminating goofy angles or grinds. It does have plenty of adjustments available for variation of parts, and the triggers and sears fit tightly on the jig pins. The eight ways to Sunday that the fixture can be adjusted, again is it's own worst enemy, but after many jobs, I wouldn't trade it for anything. Summay: Great, but it has a steep learning curve, so patience is necessary at first.