A short carbine that works indoors and out. The da Vinci 247mm barrel is the G36C length. The Laylax large handguard is made for the Marui G36C and adds room for lights and grips. The Lancer 450 round mag fits G36C magwells. Example build by LoadoutLab. Every part is listed by its shop as made for this gun. Photo: "Tokyo Marui G36C and M9.jpg" by Ominae, CC BY-SA 4.0, via Wikimedia Commons (https://commons.wikimedia.org/wiki/File:Tokyo_Marui_G36C_and_M9.jpg). The photo shows this gun model; the parts list is a suggested setup.