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Winchester 5.56x45 Ammo For Sale

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We filter out and bring you Winchester 5.56 ammo that meets our standards for reliability, performance, and price. That means better value and fresher stock. To see our entire selection across every brand, check out our 5.56 ammo page. Learn More
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  1. Winchester USA 5.56x45 Ammo - 1000 Rounds of 55 Grain FMJ Ammunition

    $519.99

    71 In stock now

    1 2 3 4 5 6 7 8 9 +10
    Bullet type FMJ
    Primer Type Boxer
    Casing Type Brass
    Condition New
    Muzzle Velocity 3180 FPS
    Muzzle Energy 1235 ft lbs
  2. Winchester USA 5.56x45 Ammo - 1000 Rounds of 55 Grain FMJ M193 Ammunition

    $505.99

    70 In stock now

    1 2 3 4 5 6 7 8 9 +10
    Bullet type FMJ
    Primer Type Boxer
    Casing Type Brass
    Condition New
    Muzzle Velocity 3180 FPS
    Muzzle Energy 1235 ft lbs
  3. Winchester USA 5.56x45 Ammo - 1000 Rounds of 55 Grain FMJ M193 Ammunition

    $499.99

    70 In stock now

    1 2 3 4 5 6 7 8 9 +10
    Bullet type FMJ
    Primer Type Boxer
    Casing Type Brass
    Condition New
    Muzzle Velocity 3180 FPS
    Muzzle Energy 1235 ft lbs
  4. Winchester USA 5.56x45 Ammo - 600 Rounds of 55 Grain FMJ Ammunition

    $294.99

    57 In stock now

    1 2 3 4 5 6 7 8 9 +10
    Bullet type FMJ
    Primer Type Boxer
    Casing Type Brass
    Condition New
    Muzzle Velocity 3180 FPS
    Muzzle Energy 1235 ft lbs
  5. Winchester USA 5.56x45 Ammo - 150 Rounds of 55 Grain FMJ Ammunition

    $85.99

    117 In stock now

    1 2 3 4 5 6 7 8 9 +10
    Bullet type FMJ
    Primer Type Boxer
    Casing Type Brass
    Condition New
    Muzzle Velocity 3180 FPS
    Muzzle Energy 1235 ft lbs
  6. Winchester USA 5.56x45 Ammo - 100 Rounds of 55 Grain FMJ M193 Ammunition

    $53.99

    103 In stock now

    1 2 3 4 5 6 7 8 9 +10
    Bullet type FMJ
    Primer Type Boxer
    Casing Type Brass
    Condition New
    Muzzle Velocity 3180 FPS
    Muzzle Energy 1235 ft lbs
  7. Winchester USA 5.56x45 Ammo - 20 Rounds of 55 Grain FMJ M193 Ammunition

    $13.49

    133 In stock now

    1 2 3 4 5 6 7 8 9 +10
    Bullet type FMJ
    Primer Type Boxer
    Casing Type Brass
    Condition New
    Muzzle Velocity 3180 FPS
    Muzzle Energy 1235 ft lbs

Overview of Winchester 5.56x45 Ammo

Key Features of Winchester 5.56x45 Ammo:

  • Trusted Quality Since 1886: Winchester has set the standard in ammunition for over 130 years, delivering reliable 5.56 NATO rounds designed for precision and performance.
  • Variety to Fit Your Needs: Whether you're looking for M193, M855 Green Tip, Match, or Defender loads, Winchester's 5.56 NATO options are crafted for everything from target practice to home defense.
  • Performance You Can Rely On: Winchester ammo is renowned for its accuracy, clean-burning powder, and dependable brass casings, ensuring smooth feeding and flawless extraction for military, law enforcement, and civilian shooters.

Winchester 5.56x45mm ammo is designed to meet the needs of various shooting disciplines, from casual plinking and target practice to competitive shooting and personal defense. The AR-15 is America’s favorite sporting rifle, and Winchester’s 5.56 ammo is the perfect match to keep your rifle running smoothly and effectively. Check out our 5.56 ballistics breakdown for the details.

Target Practice and Plinking Options:

  • M193 (55 Grain FMJ): This full metal jacket round is ideal for target shooting and plinking. Firing at 3,180 fps, it offers great accuracy and is modeled after the original NATO load for the M16/AR-15.
  • M855 Green Tip (62 Grain): Featuring a mild steel core penetrator, the green-tipped M855 round is military-spec and delivers enhanced performance at longer ranges.

For shooters seeking maximum value for high-volume training sessions, Winchester USA (commonly known as "White Box") delivers reliable performance at an affordable price point. This budget-friendly option has become a staple for AR-15 owners who want dependable brass-cased ammunition without premium pricing. Our Winchester 5.56 White Box review covers real-world testing results, accuracy, and reliability data to help you determine if it's the right choice for your range sessions.

With their extensive legacy and reputation for quality, Winchester remains one of the best choices for your AR-15 or Mini-14.

Customer Reviews

  • Steve said:

    Perfect results

  • Kevin said:

    Came fast and cheap. Buy bulk and plant freedom seeds.

  • Brink said:

    All good.

  • Brian said:

    There great for price

  • Brian said:

    Worked as described.

  • Christopher M said:

    Great price, solid performance, and Ammo.com has great customer service.

  • Justis said:

    I've used Winchester rounds in other calibers and never been disappointed by them, and I can say the same for these 5.56 rounds. Excellent training rounds, good pricing, and I've had no issues with the first 450 rounds I've used so far.

  • D. said:

    Was very happy with proformance of Winchester 556.no jams with 2 ARs.will be making another purchase very soon.Thanx much AMMO.you have great sales.

  • Jacob said:

    The rounds were dirty, with some having excess powder or some kind of processing oil/grease on them. A few boxes had 18/19 rounds in them. Worked well in my rifle after 500 rounds so far and were a good price.

  • B.S said:

    Shot 250 rounds , no isues.

  • Jona snow said:

    Great rounds , not one miss fire

  • kevinjc73 said:

    I have a Ruger AR556 in which Ive shot 200 rounds of Winchester 193 556 with no problems accurate at 50, 100 and 200 yards

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  • Shad said:

    Great Ammo; Pricey

  • J bone said:

    Same ammo as all the rest, most I've ever paid .

  • Joe said:

    Really good on the range. haven't had a problem yet

  • Jack said:

    I have always put M193 as offensive/defensive ammo, which is why I purchased it in the first place. I tested 80 rounds at 25, 50, 100, and 300 yards with a Sig M400, it was dead on accurate.

  • Mike O said:

    Shot this on my high end Geissele rifle and very, very happy with it ... target practice