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DESCRIPTION OF ASSEMBLY GROUPS
Assembly Group 1
Upper receiver with barrel, folding buttstock attachment
components
The upper receiver is produced using fiber-reinforced plastics and
houses other subassemblies. The inside of the upper receiver contains
metal guideways for the bolt group as well as attachment points for the
lower receiver with magazine well and backplate.
The barrel is inserted into and pinned to the upper receiver. The cocking
lever of the weapon is located above the barrel. It also serves to
manually lock the bolt in its open position. The right side of the upper
receiver contains the ejection port. The ejection port includes an integral
catch for engage-ment of the buttstock in its folded position.
The bottom part of the upper receiver includes the support bolts for the
lower receiver. The left side of the upper receiver includes eyebolts for
attachment of the carrying sling.
The sights are fastened to the top of the upper receiver. They consist of
a flip-up type rear sight with diopter (peep) and u-notch apertures as
well as of the front sight post with front sight hood. The rear of the upper
receiver includes the hinge for the folding buttstock.
Fig. 6 Upper Receiver with barrel, folding buttstock and attachment
components
1 Upper receiver 5 Flip-up rear sight
2 Barrel 6 Buttstock
3 Front sight 7 Buttstock release button
4 Cocking lever 8 Carrying sling attachment
points