Firearms cutting tools
AR uppers, lowers, handguards, slides, frames, bolts, and barrels — aluminum, steel, stainless, and titanium, where output and finish win the contract. Shops running RobbJack aluminum geometries have cut handguard cycle times by hundreds of percent on the machines they already own.
The challenges — and how we cut them
1Handguards and uppers: long, thin aluminum at volume
Deep-flute AL3 geometry roughs up to 8× diameter per pass, and Mirror Edge finish geometry holds thin walls without chatter — the combination behind those cycle-time wins.
2Slides, bolts, and barrels in tough steels
XF/XG variable-helix Tuffy-grade carbide handles 4140, 17-4, and stainless slide cuts; SPS takes the bolt and barrel-extension work in harder alloys.
3Slots, ports, and markings
Slitting saws for gas-block slots and ports, flat-bottom drills for counterbores that must land flat, and engraving tools for roll-mark replacements — all standard catalog items.
The firearms toolset
AL3
AL3 Aluminum End Mills
AR aluminum at volume — 8× diameter passes, thin-wall stable.
ExploreXF / XG
Steel & Titanium End Mills
Slides, bolts, and barrels in hardened and stainless steels.
ExploreSaws & Drills
Saws, Flat-Bottom Drills & Engraving
Gas-block slots, flat counterbores, and marking — from the standard catalog.
ExploreFirearms machining questions
What tooling cuts AR handguard cycle times?
Deep-pass aluminum roughing (AL3, up to 8× diameter per pass) plus a thin-wall finish geometry (Mirror Edge). Shops have cut handguard cycle times by hundreds of percent on existing machines with that combination.
What end mill for slide serrations and lockwork in 17-4 or 4140?
Variable-helix Tuffy-grade carbide — XG for general work, SPS when the material runs harder. Both control the chatter that ruins serration finishes.
Do you make the small saws for gas-block slots?
Yes — RobbJack grinds 200,000+ standard slitting saw options, and the saw calculator picks the right thickness, diameter, and tooth count for the slot and material.
From the machining lab & case files
Put it on your machine
Send us your toughest firearms part. Application engineering will spec the tool and the numbers — or quote a special from your print.