Fostech Stryker Tech-15 - These rifles have Fostech's Tech-15 lower receivers Tech-15 upper receivers & Tech-15 MACH rails. Fostech didn't stop here though. The quality continues with a KAK Industries Barrel Fostech Sabre Grip and Minimalist Stock from MFT. The rifle also is shipped in a hard-shelled case and a 30 round magazine.Specifications: Fostech Tech 15 Lower and Upper Receiver Fostech Mach 2 13" Rail Caliber: 5.56mm Fostech Black Nitride BCG Fostech Sabre Comfort Grip Minimalist Stock from MFT (1) 30 Round Magazine Optional: Single Stage Trigger