Starline Brass STAR68SPCEUP Rifle 6.8 Remington SPC Brass 50 Per Bag The 6.8 SPC Was Designed For The Military as a Cartridge That landed Between The 5.56mm Nato And The 7.62mm Nato To Be Used In The AR-15/M-4 Platform. It loses Very Little Magazine Capacity Versus The 5.56mm (25 Vs. 30 rounds), But Has Better Knockdown Power Without Much More Recoil. Type: Unprimed Case Material: Brass Style: Small Length: 1.674"-1.679" Gun Type: Rifle Metal Type: Brass Caliber Or Gauge: 6.8 Remington SPC Quantity: 50 Per Bag Recommended Usage: Reloading