S63 PWR Elite Barrel Tip - NexusHK Army continues to create the elite styling and performance with these S63 compatible barrel tips. These ones in particular feature a futuristic, hexagonal pattern that'll reduce sound signature and improve overall performance. The HK Army Elite S63 PWR Nexus barrel tip with a captivating hexagon pattern repeated from front to back. The custom milled hexagon pattern not only catches the eye, but it's a testament to the precision engineering that