5.56 :: 5.56X45MM, 55GR, Mark-1

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%

Scott Watson

12/20/2023, 15:31

5

What do you like about the product?

Amazing product!!

What would you like us to improve?

Nothing. You have an amazing company.

Comment

Amazing company and customer service. The best company I’ve dealt with!!

Bradley

Verified purchase

11/25/2023, 11:38

5

What do you like about the product?

Like most folks, I was skeptical of a new brand, but Mark 1 made a great intro offer. I’m pleasantly surprised. After shooting about 100 rounds suppressed (RC2, 11.5” barrel), I found the ammo to be solid range plinking material. Will happily buy again around the same price or slightly higher.

I also found the customer service and the experience to be great — an ammo can, a handwritten thank you card, and a hat on the first order. These folks really seem to care, let’s hope that care and the quality holds up!

What would you like us to improve?

Only availability. Doing great!

Comment

Thanks, folks!

Jae Kim

Verified purchase

11/19/2023, 18:19

5

What do you like about the product?

All 500rds. shot flawlessly. No malfunction of any type.

What would you like us to improve?

Nothing

Comment

Bueno, 10/10. Look forward to trying to buy here first

Aaron

Verified purchase

11/15/2023, 19:19

5

What do you like about the product?

I love the product because the ammo shoots so well at a great price!! Super consistent with my shots at 100 Yards. Poa poi for me off a bench. It doesnt shoot very dirty for me, casings eject well!

What would you like us to improve?

The ammo, stickers, and ammo boxes are awesome and i have nothing negative to say. Only a suggestion to maybe have an option in the future where we can buy a box without the ammo if it saves us more money or lets you guys be able to pump out more ammo? Otherwise im going to find myself with a ton of ammo boxes, though thats not a total negative. I just wont have the room for them!

Comment

Keep up the awesome work. Your customer service is great, and you move a great product.

Rex

11/06/2023, 16:23

5

What do you like about the product?

Very happy with how quickly i received it at a good price in today's market. Ran about 50 rounds thru my AR with no issues. Researched manufacturer of 556 ammo and happy with what i read and reviews were very good to. Will definitely buy again

What would you like us to improve?

No problems with this company, will tell my friends about this ammo site.

Comment

This company ships to Massachusetts, getting harder to find ammo companies that will ship to this state. Thanks Mark1 ammo for what you do

Anonymous

11/03/2023, 00:53

5

What do you like about the product?

I can't say enough about this ammo. Ordered early Monday morning (3rd shift worker) and had the ammo at my door by Thursday afternoon. No issues out of the 300rds i put down range and good grouping.Hand written thank you note and a hat included. Those little things go a long way when common courtesy is lost today. Amazing customer service. I've already purchased several more of these cans and cases of 9mm. This company has a customer for life.

What would you like us to improve?

Nothing, keep pressing em so we can keep loading em

Comment

Can't beat price, quality, and amazing customer service!

Anonymous

11/02/2023, 19:29

5

What do you like about the product?

-Fast shipping
-Packaged well
-Very nice goodies and can
-Clean ammo like my booty
-Great website, and social media presence

What would you like us to improve?

I don't know.

Comment

I am very pleased that I took a chance on a new company. I hope Mark1Ammo continues to serve their customers and create a great community around their company and values. Thank you!

Justin v

10/29/2023, 06:50

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

Anonymous

10/23/2023, 08:53

5

What do you like about the product?

The rounds I received were some of the best I've seen recently. Clean, consistent, reliable and accurate.

What would you like us to improve?

Some mark 1 merchandise and gear to proudly wear and use to show my support.

Comment

These guys aren't afraid to unashamedly stand for FREEDOM and that particular way of life and I will continue to use mark 1 as long as they do. The only thing better than the rounds they produce is the customer service they offer. Outstanding job gentlemen and keep up the good work! Stay FREE

Mark-1 Team

Heck yeah, brother!

Greg from NC

Verified purchase

10/21/2023, 14:24

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

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

Featuring ARMSCOR BATCH: