5.56 NATO is loaded to higher pressures and typically has a different chamber spec. .223 Remington is a civilian chamber spec. You can safely shoot .223 Rem in a 5.56-chambered rifle, but firing 5.56 in a rifle marked only .223 Rem is not recommended.
5.56x45mm NATO Ammo
Showing 1–12 of 17 resultsSorted by popularity
FEATURED
PMC X-TAC 5.56x45mm NATO 55gr FMJ Ammo
20-Round
1000-Round
16 reviews
Original price was: $12.99.$9.99Current price is: $9.99.
20 rounds / $0.50 per round
Original price was: $649.99.$459.99Current price is: $459.99.
1000 rounds / $0.46 per round
20-Round
1000-Round
22 reviews
$10.99
20 rounds / $0.55 per round
$519.99
1000 rounds / $0.52 per round
20-Round
1000-Round
5 reviews
$11.99
20 rounds / $0.60 per round
$549.99
1000 rounds / $0.55 per round
20-Round
200-Round
3 reviews
$22.99
20 rounds / $1.15 per round
$219.99
200 rounds / $1.10 per round
50-Round
1000-Round
3 reviews
$27.99
50 rounds / $0.56 per round
$539.99
1000 rounds / $0.54 per round
Out of stock
20-Round
500-Round
3 reviews
$13.99
20 rounds / $0.70 per round
$329.99
500 rounds / $0.66 per round
20-Round
200-Round
2 reviews
$17.99
20 rounds / $0.90 per round
$169.99
200 rounds / $0.85 per round
20-Round
500-Round
$11.99
20 rounds / $0.60 per round
$274.99
500 rounds / $0.55 per round
20-Round
500-Round
$12.99
20 rounds / $0.65 per round
$299.99
500 rounds / $0.60 per round
Out of stock
50-Round
1000-Round
1 review
$24.99
50 rounds / $0.50 per round
$479.99
1000 rounds / $0.48 per round
Out of stock
FAQs
What is the difference between 5.56 NATO and .223 Remington?
What are M193 and M855 and how do they differ?
M193 is a 55 grain full metal jacket round commonly used for general training. M855 is a 62 grain green-tip style round that uses a steel penetrator in the core and offers different barrier performance. Pick the load that matches your use and any range restrictions.
Which bullet weights should I choose for accuracy or hunting?
40 to 55-grain bullets are common for varmint and general-purpose work. 62 to 77 grain bullets are popular for longer range precision and hunting. Match your choice to your barrel twist rate for reliable stabilization.