Editing Collet (section)

===Firearms===
[[File:Repetiergewehr mit Spreizhülsenverschluss zurückfedernd CC BY-SA 4.0 by Grasyl.svg|thumb|upright|Schematic of a (straight-pull) collet locked firearm operation]]
The [[Blaser R93]] (and related models) use a unique bolt locking system that employs an expanding collet. The collet has claw-like L-shaped segments that face outward from the axis of the barrel.<ref>{{cite web | url=https://patents.google.com/patent/US2297693A/en | title=Autoloading firearm }}</ref> The multiple claws give a large contact area to distribute load. As the [[breech (firearms)|breech]] is closed, the collet expands, extending the claws to engaging with an annular groove in the barrel just behind the chamber; locking the bolt closed.<ref>[https://www.youtube.com/watch?v=Yz8IbOXiH-k Blaser Straight Pull Rifles R93 R8 CISM LRS2], accessed 8 July 2021.</ref><ref>''[https://gundigest.com/rifles/hunting-rifles/the-all-un-american-straight-pull-bolt-action-rifle The All-Un-American Straight-Pull Bolt-Action Rifle]'', Gun Digest, accessed 2 June 2022.</ref> The [[Thompson submachine gun|Thompson .30-06 prototype]] used a collet locking operation.<ref>{{cite web | url=https://patents.google.com/patent/US1397698A/en | title=Gun }}</ref><ref>{{cite web | url=https://www.youtube.com/watch?v=bq8kvlZVlnM | title=Only Footage of the Springfield 30-06 Prototype | website=[[YouTube]] | date=7 October 2024 }}</ref>