Turret lock
The rotating head bolt is a locking bolt system for handguns , which consists of a bolt carrier and a bolt head rotatably mounted on it.
Working principle
The bolt head usually has several locking lugs and at the end of the bolt advance, after the cartridge has been fed , is forced into a rotary movement via a control cam in the system housing. As a result of the turning process, the locking lugs of the bolt head grip into precisely fitting grooves in the cartridge chamber, similar to a bayonet lock .
After the shot has been fired, the sliding bolt carrier and the control cam ensure that the bolt head rotates in opposite directions. This frees itself from the lock, runs back together with the bolt carrier and releases the barrel . In this movement, which is faded sleeve extended and in abutment with the ejector through the ejection port ejected. At the beginning of the return movement, the bolt carrier cocks the striker. In the following preroll, the rotary head grabs the next cartridge from the magazine , inserts it into the chamber and closes the barrel, after which the weapon is ready to fire again.
One advantage of the rotating head lock is that it locks directly in the chamber or, with some weapons, even in the barrel. As a result, the recoil forces are not directed into the breechblock housing, but into the barrel, which means that the housing can be made weaker than with other locking systems ( e.g. tilting block lock or support flap lock ). For this reason, the rotating head lock has become more and more popular in modern automatic firearms. He is considered very reliable.
Mannlicher Turret Lock M1895
Bolt carrier with lock, AK-74
Closure of the M-16
Clasp Desert Eagle
Lock SIG 550
Guns with rotating head lock
The Mannlicher Model 1895 infantry rifle and the Mannlicher Model 1893 carbine can be considered the first weapons with a rotating head lock . Later developments were the MG 34 , the Kalashnikov rifle, the SIG 550 , the M-16 rifle , the Heckler and Koch G36 and the Steyr AUG (assault rifle 77) . A specialty are the Desert Eagle and AutoMag pistols , which are handguns with a rotating head lock.
literature
- Rolf Abresch, Ralph Wilhelm (ed.): Modern hand weapons of the Bundeswehr. Report Verlag, Frankfurt am Main u. a. 2001, ISBN 3-932385-10-1 .
- Martin J. Brayley: Kalashnikov AK47 Series The 7.62 × 39 mm Assault Rifles in Detail , The Crowood Press, Ramsbury, Marlborough 2013, ISBN 978-1-84797-483-9 .
- Peter Dannecker: Locking systems for firearms dwj Verlags-GmbH, Blaufelden 2009, ISBN 978-3-936632-20-0 .
- Hans Stögmüller: Josef Werndl and the weapons factory in Steyr , Ennsthaler-Verlag, Steyr 2010, ISBN 978-3-85068-860-4 .
- Stefan Perey, Michael Fischer, technical description of the "Burk self-loading rifle BR-10" (article with information on the rotary head lock), in issue 3, Caliber , 2015 ( digital copy online )
Web links
- Rotary head lock MG 34 , at waffeninfo.net (archive version)
