The Mark-1 Project
The Mark-1 Project

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

Write a review
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%
Justin v
5
What do you like about the product?
Excellent product!! Was afraid to try as anyone should be with a new business and I also couldn’t find allot of reputable positive reviews I spent almost an hour researching. Got my box in about 4 days with the hand written thank you not and upon close Inspection of ammo and putting it side by side with rounds from a very large trusted company mark1 took the win, excellent craftsmanship. I loaded up, pulled the trigger and to my relief it shot perfectly! All the scary thoughts of my gun cracking or blowing out from bad rounds went out the window I order another box that night!! No joke this is the only stuff I buy now especially because it small business American made
What would you like us to improve?
Maybe 1k rounds and up deals
Comment
Mark1,don’t lose sight of most of us work hard and want to spend our money on something that is of value and works when needed. If you keep the standard and the values I’ll keep buying
Possibly you may be interested
Fast and high quality delivery

Mark-1 products are in stock, we always ship on time

Quality assurance and service

We offer only those goods, in which quality is tested and trusted

The Best customer service

Our customers are our #1 priority