The 9R model features an M-LOK compatible aluminum handguard and 16.2" barrel. Both a push button and paddle magazine release are standard. The 4.5" precision-welded top rail enables use of your favorite optic or the traditional iron sights (included). The fixed polymer stock includes a sling attachment point. California configuration which includes a polymer 10-round magazine.Features :Roller-delayed blowbackSemi-AutoFixed Stock