Tactical Waifu Reloads reviews his Cybergun FN509c Spring airsoft pistol. The Cybergun FN Herstal FN509 Compact MRD is a 180mm long, 160g spring pistol designed for close-quarters combat. Crafted from high-quality polymer, it boasts a reinforced spring for durability and consistent performance. The pistol features an original logo for authenticity, a Picatinny rail for accessory mounting, and an adjustable hop-up for enhanced accuracy.