This 5.56×45 cartridge by Winchester isn’t your run of the mill FMJ. It’s an M855, also known as the SS109 or “penetrator.” The penetrator projectile’s slightly greater weight gives it a higher sectional density than a conventional 55 grain bullet, but that’s not the only reason why it penetrates so well. This bullet’s green tip indicates that it ends in a seven grain steel spike, which enables it to reliably pierce a 0.12” thick sheet of steel well beyond 600 yards. For armored or vehicular threats, the penetrator is the bullet for the job.
This NATO spec cartridge offers all the high quality components that you should expect from a revered manufacturer like Winchester. This round features a reloadable brass shell casing, drawn and tapered to specific dimensions for unfailing feeding, chambering, and extraction. Its new-fashioned Boxer primer won’t permit corrosive salts to accumulate in the chamber and bore, and its propellant burns up clean to deliver consistent ballistic performance.
Please Note: While they share the same dimensions, the 5.56×45 is loaded to a higher pressure than the 223 Rem. Do not fire this ammo in a weapon that is chambered solely for 223 Rem.
We do not sell or ship ammunition to residents of: Alaska (r), California, Illinois, New Jersey, Hawaii, Massachusetts, New York State, Washington DC or any location that requires air shipment. Please check your state and local laws before ordering ammunition. Certain other restrictions may apply.
MPN#: AMM-15-556-100-001

Browse more Winchester 223/5.56 for sale ammo.

Rebates for Winchester brand

Exp. date: 01.12.2020
Between August 1, 2020 - November 30, 2020, earn up to $10 back when you purchase boxes of eligible Winchester slugs and buckshot.
Earn $5 for each 5-round box of XP3 or Dual Bond shotgun slugs you purchase.
Earn $2 for each 5-round box of Super X or Deer Season shotgun slugs you purchase.
Earn $6 for each 15-round box of Super X rifled shotgun slugs or buckshot you purchase.
Earn $4 for each 10-round box of Varmint X buckshot you purchase.
Exp. date: 01.01.2021
Earn up to $100 back on Blind Side® ammunition and up to $50 back on Drylok ammunition.
Exp. date: 01.12.2020
Minimum rebate amount: $5 (one box) | Maximum rebate amount: $10 (two boxes) Offer is valid on qualifying purchases made between August 1, 2020 - November 30, 2020. All requests must be postmarked no later than December 15, 2020.
Exp. date: 01.01.2021
Minimum rebate amount: $8 (4 boxes) | Maximum rebate amount: $40 (20 boxes)

Price History Chart Live Prices

Want to see your products here? Click this link.