Editing AK-74 (section)

====Iron sights====
The AK-74 uses an adjustable notched rear tangent [[iron sight]] calibrated in {{convert|100|m|yd|0|abbr=on}} increments from {{convert|100|to|1000|m|yd|0|abbr=on}}. The front sight is a post adjustable for elevation in the field. Horizontal adjustment requires a special drift tool and is done by the armoury before issue or if the need arises by an armourer after issue. The sight line elements are approximately {{convert|48.5|mm|in|1|abbr=on|lk=on}} over the bore axis. The "[[point-blank range]]" battle zero setting "''П''" standing for ''постоянная'' (constant/consistent/permanent) the 5.45×39mm AK-74 rear tangent sight element corresponds to a {{convert|400|m|yd|0|abbr=on}} zero, compared with the {{convert|300|m|yd|0|abbr=on}} zero for 7.62×39mm AKs.<ref name="Rottman">{{cite book |first=Gordon |last=Rottman |title=The AK-47: Kalashnikov-series Assault Rifles |url=https://books.google.com/books?id=qK9Nn-2xocUC&pg=PA42 |access-date=24 December 2011 |date=24 May 2011 |location=Oxford, UK |publisher=Osprey Publishing |isbn=978-1-84908-835-0 |page=42– |archive-url=https://web.archive.org/web/20140103131237/http://books.google.com/books?id=qK9Nn-2xocUC&pg=PA42 |archive-date=3 January 2014 |url-status=dead}}</ref><ref>{{cite web |url=http://russianoptics.net/400mzero.html |title=Using a 400 meter zero with 5.45x39 |date=2010 |website=RussianOptics.net |access-date=16 November 2014 |archive-url=https://web.archive.org/web/20141129074754/http://russianoptics.net/400mzero.html |archive-date=29 November 2014 |url-status=live}}</ref> For the AK-74 combined with the 7N6 or 7N10 service cartridges the 400 m battle zero setting point-blank range limits the [[External ballistics#Bullet drop|apparent "bullet rise"]] within approximately {{convert|-5|to|+38|cm|in|1|abbr=on}} under the line of sight. At the corresponding {{convert|440|m|yd|0|abbr=on}} maximum point-blank range the bullet will have dropped to approximately {{convert|-21|cm|in|1|abbr=on}} relative to the line of sight. Soldiers are instructed to fire at any target within this range by simply placing the sights on the center of mass (the belt buckle, according to Russian and former Soviet doctrine) of the enemy target. Any errors in range estimation are tactically irrelevant, as a well-aimed shot will hit the torso of the enemy soldier.<ref name="Rottman" />