The Mark-1 Project
The Mark-1 Project

5.56X45MM, 55GR, Mark-1 - 500CT

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5.56-BRASS-55GR-MK1-500
$28500
Out of stock

You will receive: 500 Rounds of 5.56 55GR FMJ Brass Casing  + Ammo Can 

Experience the pinnacle of ammunition craftsmanship with Mark-1's 5.56x45mm 55gr cartridges. Precision-engineered for unparalleled performance.

Caliber5.56x45mm NATO Casing MaterialBrass Muzzle EnergyApproximately 1 , 211.3 ft-lbs 1,211.3 ft-lbs for a 55gr bullet traveling at 3,109 fps. ft-lbs Muzzle VelocityApproximately 3,109 fps when fired from a 24-inch barrel. FPS Powder TypeBall Powder Primer TypeBOXER Bullet TypeFULL METAL JACKET (FMJ) Grain Weight55 GRAINS Package Dimensions11.5X7.25X5.06 inches Package Weight12.8 lbs Packaging TypeAmmo Can Round Count Per Package500 rounds

Featuring ARMSCOR BATCH: 

As Promised: Transitioning to Excellence As part of our unwavering commitment to quality, we've made a significant change: We've stopped using ZSR cases and have upgraded to premium ARMSCOR BATCH cases for our MARK-1 5.56 ammunition.

Mark-1 5.56x45mm 55GR Ammo a product of unmatched precision, consistency, and reliability. Crafted for professionals and shooting enthusiasts alike, each cartridge promises performance that stands a class apart. With a meticulous manufacturing process and rigorous quality checks, our 5.56x45mm ammunition redefines excellence in ballistics. Whether you're engaging in sharpshooting, tactical training, or recreational shooting, trust Mark-1 to deliver the perfect shot every time.

Ammo Specs
Caliber
5.56x45mm NATO
Casing Material
Brass
Muzzle Energy
Approximately 1 , 211.3 ft-lbs 1,211.3 ft-lbs for a 55gr bullet traveling at 3,109 fps.ft-lbs
Muzzle Velocity
Approximately 3,109 fps when fired from a 24-inch barrel. FPS
Powder Type
Ball Powder
Primer Type
BOXER
Bullet Type
FULL METAL JACKET (FMJ)
Grain Weight
55 GRAINS
Packaging Details
Package Dimensions
11.5X7.25X5.06inches
Package Weight
12.8 lbs
Packaging Type
  • Ammo Can
Round Count Per Package
500 rounds
Advanced Performance Metrics
Firearm Compatibility
Ensure your firearm is rated for 5.56mm before using it, AR-15/M16/M4 Platform Rifles, Ruger Mini-14, Steyr AUG, HK416, FN SCAR-L (MK 16), Sig Sauer SIG556, Tavor (IWI), CZ Bren 2, LWRC M6
Quality Assurance
Triple-checked using state-of-the-art technology to ensure each bullet meets our rigorous quality standards.
Precision/Accuracy
Expertly engineered for a balanced flight trajectory, our FMJ bullet maintains a true course to your target.
Flash
Minimized muzzle flash for discreet shooting, ideal for low-light conditions.
Feed
Optimized case and bullet design to ensure smooth feeding in semi-automatic firearms.
Consistency
Manufactured under tight tolerances to ensure uniformity across rounds, resulting in repeatable performance shot after shot.
Barrier Penetration
Solid FMJ construction designed to maintain integrity even when encountering barriers.
Recoil
Designed for a manageable and predictable recoil, enabling faster follow-up shots and improved shooting comfort.
5
5 out of 5
Reviews: 19
5 stars
100%
4 stars
0%
3 stars
0%
2 stars
0%
1 star
0%
Greg from NC
Verified purchase
5
What do you like about the product?
Excellent experience purchasing from Mark-1. I got the package in good time, and was pleased with the quality and was exactly as described. I haven't had a chance to try out the ammo yet, but will try to next weekend. I just felt compelled to leave a good review and will update but great job guys
What would you like us to improve?
Only a suggestion if you ever plan to offer 7.62 x 39 and 10mm in the future i'd be interested in purchasing!
Comment
Thanks also for the nice note was a cool touch
Mark-1 Team
We're so thrilled to hear about your excellent experience with us and that your package arrived safe and sound! It's great to know that everything was as expected, and we can't wait for you to try out the ammo. Fingers crossed for a fantastic range day next weekend! Thank you so much for taking the time to leave this awesome review; it genuinely means the world to us. We're always looking for ways to expand our offerings, so we'll definitely take your suggestion about stocking 7.62 x 39 and 10mm into consideration. Keep an eye out in the future! And you're very welcome for the note—we love adding that personal touch to show our appreciation for amazing customers like you. Looking forward to serving you again soon, and happy shooting! - The MARK-1 Ammo Team
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