PPU 5.56mm 55 Grain Full Metal Jacket Rifle Ammo 20 Rounds. 56mm 55 Grain Full Metal Jacket Rifle Ammunition online at OpticsPlanet. This PPU Ammunition features Full Metal Jacket (FMJ) bullets that deliver powerful stopping power superior accuracy and reliability. With premium brass cases loaded with full metal jacket (fmj) bullets. With incredible savings on Ammunition and other superior rifle ammo from trusted brands like PPU you re sure to find the best round for the hunting grounds or the range. Stock up today to save big on ammo and other top-tier tactical hunting and outdoor gear at OpticsPlanet. Specifications for PPU 5.56mm 55 Grain Full Metal Jacket Rifle Ammunition: Manufacturer: PPU Caliber: .223 Remington Number of Rounds: 20 Bullet Type: Full Metal Jacket (FMJ) Bullet Weight: 55 grain Cartridge Case Material: Brass Muzzle Velocity: 3240 ft/s Muzzle Energy: 1282 ft-lbs Package Type: Box Included Accessories: None Primer Style: Centerfire Internal Dimensions: 1.45 X 1.95 X 2.40 in External Dimensions: 1.45 X 1.95 X 2.40 in Dimensions: 1.45 X 1.95 X 2.40 in Length: 2.4 in Package Contents: PPU 5.56mm 55 Grain Full Metal Jacket Rifle Ammunition Ppu Igman 5.56 .55gr Fmj 20rd 50bx/cs