The XM16E1 differed from AR-15/M16 by possessing an additional device, the so referred to as "ahead aid", which was utilized to manually push the bolt team set up in the situation of jams. The common sighting machines of the G36 is made of TWO scopes - one 3.5X telescope http://josuejudwe.blogkoo.com/the-2-minute-rule-for-hk-g3-10305450