5.56 Ammo - 150 Rounds
(0)
Winchester Ammo 5.56x45mm NATO M193 Ammo 55 G rain FMJ 150 Rounds Value Pack
Brand:
CCI
Bullet Type:
FULL METAL JACKET (FMJ)
Caliber:
5.56×45mm NATO
Capacity:
150
Finish Per Color:
Brass
Grains:
55 grain
From:
$74.99
View Product
25
(20)
Winchester M855 62 gr Green Tip FMJ 5.56x45mm Ammunition 150 Rounds - WM855150
Brand:
Winchester
Bullet Type:
Full Metal Jacket
Caliber:
5.56×45mm NATO
Capacity:
150
Finish Per Color:
Brass
Grains:
62 grain
From:
$81.99
View Product
18
(4)
Hornady Frontier 55 gr Full Metal Jacket 5.56 Ammo, 150/box - FR2015
Brand:
Hornady
Bullet Type:
Full Metal Jacket
Caliber:
5.56×45mm NATO
Grains:
55 grain
Rounds:
150
From:
$52.93
View Product
12
(0)
Hornady Frontier 62 gr Full Metal Jacket 5.56 Ammo, 150/box - FR2615
Brand:
Hornady
Bullet Type:
Full Metal Jacket
Caliber:
5.56×45mm NATO
Capacity:
150
Grains:
62 grain
Rounds:
150
From:
$93.40
View Product
11
(0)
Frontier 556nato 55gr Hp M 150/box
Brand:
Frontier Cartridge
Bullet Type:
Hollow Point Match
Caliber:
5.56×45mm NATO
Grains:
55 grain
Rounds:
150
(0)
Frontier Ammo 5.56 Nato 62Gr SP 150Bx,4Bx/Cs FR282
Brand:
Hornady
Caliber:
5.56×45mm NATO
Rounds:
150
(0)
American Eagle 5.56mm 55gr FMJ Ammunition 150rds - XM193BK150
Brand:
Federal
Bullet Type:
Full Metal Jacket
Caliber:
5.56×45mm NATO
Grains:
55 grain
Rounds:
150
Marketplace Insights
★ 4.6/5
based on 24 customer reviews across 10 variants from 28 retailers
Customers praise the ammo's reliability and value pricing, with mostly positive experiences; few isolated complaints about casing quality and shipping practices.
What customers like
Quality and Reliability63%
Good quality ammo at a decent price. Shoots well in my ARs accurate and dependable.
Value and Pricing50%
Great Ammo at a Great price. High recommend.
Fast Shipping25%
Ammunition was available and shipped promptly to my local FFL shop
Availability During Shortage17%
PSA came through. When so many others have canceled orders due to stock depletion
Common concerns
Reloaded Casing Quality4%
This is reloaded brass and many of the casings have dings and imperfections.
Shipping Packaging Security4%
I was surprised that the ammo was not stolen.
Order Fulfillment Issues4%
I did not receive this product ! You received it back at your dock weeks ago
Frequently Asked Questions
5.56 Ammo - 150 Rounds
Is 5.56 NATO and 5.56 X45 the same?
Yes, 5.56x45 and 5.56 NATO are the same round. The "x45" refers to the 45mm case length. Note that .223 Remington is slightly lower pressure and generally safe in 5.56 NATO chambers, but shooting 5.56 NATO in a .223 chamber risks dangerous pressure levels.
What do green tip 556 rounds do?
Green tip 5.56 rounds (M855) use a steel penetrator tip over a lead core, allowing them to punch through light barriers like sheet metal more effectively than standard ball ammunition. They're common for target shooting and situations where penetrating light cover is needed.
Are .223 and 5.56 ammo interchangeable?
5.56 NATO fires safely in .223 Remington chambers, but not vice versa. Wait — it's actually the opposite: .223 Remington fires safely in a 5.56 NATO chamber, but 5.56 NATO should not be fired in a .223 chamber. 5.56 runs higher pressure, risking dangerous spikes in .223 rifles. Always match ammo to your chamber marking.
Do I need a different MAG for 223 and 556?
No. Since .223 and 5.56 cartridges have identical external dimensions, the same magazine feeds both rounds reliably. The difference lies in chamber pressure and rifle chamber specs, not magazine compatibility. Ensure your rifle's chamber matches your ammunition type.
What grain of AR-15 ammo is best?
Best grain depends on your use. For defense, 62-grain offers good barrier penetration. For general plinking, 55-grain is affordable and versatile. Heavier rounds like 77-grain perform better at longer ranges. Match grain weight to your barrel's twist rate and intended purpose.
How do I know if my AR can shoot 5.56 and 223?
Check your barrel marking between the front sight and muzzle. If stamped "5.56 NATO" or ".223 Wylde," you can shoot both safely. A ".223 Remington" marking means avoid 5.56 NATO, as it risks dangerous pressure spikes. Match your ammo to the chamber type marked on your barrel.
Can I buy 556 ammo at Walmart?
Walmart announced in 2019 it would stop selling short-barrel rifle ammunition like 5.56 NATO, but the policy appears inconsistently enforced. Some Walmart locations and Walmart.com may still carry 5.56 ammo. For reliable availability, check dedicated firearms retailers, sporting goods stores like Bass Pro or Cabela's, or online ammunition retailers.