Bulk 5.56x45 Ammo
5.56x45 NATO Ammunition
5.56x45 ammo derived from the .222 cartridge and was officially adopted as the standardized NATO round in 1963. Essentially, 5.56x45 as a caliber came into being because the military was using 7.62x51 and critics believed the larger round was too powerful for light service rifles, leading to rough recoil and a slower than desired rate of fire in military service rifles. Today, the NATO standard cartridge is designated as “M855”. You’ll often find it in-stock and available to shooters. We also carry a huge in-stock selection of .223 ammo for sale here.
[Read More]-
1000 Rounds of 5.56x45 Ammo by Igman - 55gr FMJ M193
Regular Price: $424.00
On Sale: $399.00
75 Ready to Ship
-
1000 Rounds of 5.56x45 Ammo by Winchester USA - 55gr FMJ M193 Save 25% w/ Mail-In-Rebate
Regular Price: $459.00
$420.00
78 Ready to Ship
-
1000 Rounds of 5.56x45 Ammo by Winchester USA - 55gr FMJ Save 25% w/ Mail-In-Rebate
Regular Price: $479.00
$425.00
76 Ready to Ship
-
1000 Rounds of 5.56x45 Ammo by PMC - 55gr FMJ
$444.0077 Ready to Ship
-
1000 Rounds of 5.56x45 Ammo by Winchester - 62gr FMJ M855 Save 25% w/ Mail-In-Rebate
Regular Price: $469.00
$450.00
76 Ready to Ship
-
1000 Rounds of 5.56x45 Ammo by PMC - 62gr FMJ XM855
$469.0078 Ready to Ship
-
1000 Rounds of 5.56x45 Ammo by Winchester USA - 55gr FMJ M193 Save 25% w/ Mail-In-Rebate
$469.0016 Ready to Ship
-
1000 Rounds of 5.56x45 Ammo In Plastic Battle Packs by PMC - 55gr FMJ
$479.005 Ready to Ship
-
420 Rounds of 5.56x45 Ammo by Federal American Eagle in Ammo Can - 55gr FMJBT XM193
$204.00 As low as: $200.0084 Ready to Ship
-
1000 Rounds of 5.56x45 Ammo by Winchester USA - 62gr FMJ M855 Save 25% w/ Mail-In-Rebate
$509.0056 Ready to Ship
-
500 Rounds of 5.56x45 Ammo by Federal American Eagle - 55gr FMJ XM193
$270.0080 Ready to Ship
-
1000 Rounds of 5.56x45 Ammo by Federal - 55gr FMJBT
$549.0020 Ready to Ship
-
500 Rounds of 5.56x45 Ammo by Federal American Eagle - 55gr FMJBT XM193
$279.0048 Ready to Ship
-
600 Rounds of 5.56x45 Ammo by PMC - 62gr FMJ
$339.0012 Ready to Ship
-
20 Rounds of 5.56x45 Ammo by Igman - 55gr FMJ M193
$11.55 As low as: $10.75106 Ready to Ship
-
100 Rounds of 5.56x45 Ammo by Federal American Eagle - 55gr FMJ XM193
$59.5063 Ready to Ship
-
20 Rounds of 5.56x45 Ammo by PMC - 55gr FMJ
$12.25 As low as: $10.50100 Ready to Ship
-
20 Rounds of 5.56x45 Ammo by PMC - 62gr FMJ XM855
$12.35 As low as: $10.75141 Ready to Ship
-
20 Rounds of 5.56x45 Ammo by Winchester USA - 55gr FMJ M193 Save 25% w/ Mail-In-Rebate
$13.0578 Ready to Ship
-
20 Rounds of 5.56x45 Ammo by Winchester USA - 55gr FMJ M193
$13.50147 Ready to Ship
-
500 Rounds of 5.56x45 Ammo by Hornady Frontier - 68gr BTHP Match
$349.0082 Ready to Ship
-
20 Rounds of 5.56x45 Ammo by Winchester - 62gr FMJ M855 Save 25% w/ Mail-In-Rebate
$14.25153 Ready to Ship
-
20 Rounds of 5.56x45mm M855 Penetrator Ammo by Winchester - 62gr FMJ Save 25% w/ Mail-In-Rebate
$14.55 As low as: $13.00156 Ready to Ship
-
420 Rounds of 5.56x45 Ammo by Winchester USA in Ammo Can - 55gr FMJ M193 on Stripper Clips
$309.0014 Ready to Ship
-
500 Rounds of 5.56x45 Ammo by Hornady Frontier - 75gr HPBT Match
$399.0031 Ready to Ship
-
420 Rounds of 5.56x45 Ammo by Winchester in Ammo Can - 62gr FMJ M855
$349.004 Ready to Ship
-
30 Rounds of 5.56x45 Ammo by Winchester - 55gr FMJ M193 on Stripper Clips With Loader Save 25% w/ Mail-In-Rebate
$25.50144 Ready to Ship
-
200 Rounds of 5.56x45 Ammo by Hornady BLACK - 62gr FMJ
$174.0026 Ready to Ship
-
30 Rounds of 5.56x45 Ammo by Winchester - 62gr FMJ M855 on Stripper Clips With Loader Save 25% w/ Mail-In-Rebate
$27.7563 Ready to Ship
-
20 Rounds of 5.56x45 Ammo by Hornady Frontier - 75gr HPBT
$20.5097 Ready to Ship
-
5.56x45 - 62 Grain FMJ - Hornady BLACK - 20 Rounds
$21.25114 Ready to Ship
-
200 Rounds of 5.56x45 Ammo by Hornady BLACK - 75gr InterLock HD SBR
$229.0079 Ready to Ship

5.56x45 Ammo Types
The majority of 5.56x45 rounds sold today are full metal jacket (FMJ) or full metal jacket boat-tail cartridges. Incredibly fast, with a muzzle velocity that’s generally more than 3,000 feet per second, you’ll find 5.56 ammo with a 62-grain projectile as well as lighter rounds with a common 55-grain bullet. In either case, you can expect muzzle energy to be in the ballpark of 1,300 foot pounds.
.223 Remington vs. 5.56x45 Ammo

While the civilian .223 Remington round is very similar, it is not the same as 5.56x45 ammunition. The two cartridges are loaded to different pressures when adhering to SAAMI (Sporting Arms and Ammunition Manufacturers Institute) specifications. Because of that difference in pressure, you may run into trouble if you elect to fire 5.56x45mm NATO rounds from a chamber with a shorter .223 Rem leade.
Popular Rounds for Sale at BulkAmmo.com
5.56x45mm is one of the most popular calibers at BulkAmmo.com. While there are a number of reliable rounds, the most popular manufacturers of the NATO round tend to be produced by Lake City, Federal American Eagle, and PMC (Precision Made Cartridge).