Yulius Wisdam Arya Prasetyo, Daniel Pandapotan, and Marcellino Aditya Mahendra. “Pemanfaatan Limbah Peluru BB Pada Pengembangan Desain Handstop Grip Dan Handguard Cover Airsoftgun”. DEFENDONESIA 9, no. 1 (April 30, 2025): 18–28. Accessed May 11, 2025. https://ejournal.lembagakeris.net/index.php/Defendonesia/article/view/149.