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Side Opening Automatic Knives
A side opening automatic knife is the closest thing to a normal folder that still fires on its own. The blade pivots out on an axis the way any automatic folding knife does, released by a button set into the scale instead of a thumb stud. No rails, no chassis, no travel channel. That simplicity is why side openers have outlasted every trend in the automatic knife category, and why most people carrying an auto for work carry this kind.
Push Button Knives and How Side Opening Autos Lock Up
The button does two jobs. Press it closed and it releases the blade to the spring. Press it open and it pulls the lock face clear so the knife folds. Most production side openers run a button lock or a plunge lock, where a spring loaded post drops into a notch in the tang and takes the load directly in line with the blade. It is one of the strongest lock geometries in any folder, with no liner to wear and no lockbar to fatigue. Some models use crossbar and slide scale variations, and the better ones add a secondary safety so the button cannot be bumped in a pocket.
Why an Automatic Pocket Knife Carries Better Than an OTF
Blade to handle ratio. An out the front knife has to store the blade plus the full length of its travel, so a three and a half inch OTF closes right around five inches. A side opener with the same blade closes at four and a half and lies flatter against the seam with no rail assembly adding width. Less mechanism also means less to foul. Grit that would bind an OTF channel gets scraped off a pivot and forgotten. If the knife lives in a work pocket instead of a display case, that gap shows up by month three.
Side Opening Automatic Knives from Pro-Tech, Kershaw, and Boker
Pro-Tech is the benchmark. The Godfather, Malibu, and Runt fire with a smoothness nobody else has matched in production, and the company built its entire identity on side openers. Kershaw's Launch series made the category reachable without softening the action, running from the sub two inch Launch 4 up through the full size models. Boker's Kalashnikov has introduced more people to automatics than any knife on the market. Benchmade's Claymore leads its side opening lineup, and Microtech, Buck, and Spyderco all field side openers worth carrying.