The DY9 Island Kit was crafted for shooters who crave precision, control and performance. Perfect for home defense, range practice, or competitive shooting. Its iconic Island Barrel Design shifts mass to the barrel and integrates four top-mounted gas ports to dramatically reduce muzzle rise, delivering flatter recoil and faster, more accurate follow-up shots. Features fixed front sight; slide features an RMR cut and an ergonomic grip. Works with Magazines for STK100/200, Glock 17/19. Includes three magazines, ammo case w/soft case inside, guide rod, gun brush, Allen key, cleaning rod and four backstraps- sm, med, large and XL.