Skip to main content

5.56x45mm NATO

The 5.56x45mm NATO round is a micro-caliber rifle round based upon the .223 Remington loading. In the US military, it is known as the M855A1 in it's most recent incarnation. In the rest of the world the 5.56x45mm NATO is known as the SS109.

Originally, the 5.56x45mm was designed with two goals in mind: Incapacitation, and weight reduction. The round was designed to wound a soldier, rather than kill them outright like the 7.62x51mm NATO round that came before it, as it would take two more soldiers out of the fight to take care of them.

Not only this, but the 5.56x45mm NATO is shorter and lighter than the 7.62x51mm NATO round that was it's predecessor, allowing troops to carry more ammunition.
The 5.56x45mm NATO round, also called the SS109, is the most commonly used Military-issue rifle round in the western world. However, it's usefulness has deteriorated against an enemy that does not value their lives, nor the lives of their comrades.
by Herr Jaeger November 30, 2011
mugGet the 5.56x45mm NATO mug.

The 5-5-5 Scale

Commonly used scale to rate women based on their three most important components, tits, face, and ass. A scale of 1-5 is used to judge each part of woman. A 15 would be a really hot girl with great tits and firm ass. A 0 would be, you know.
- Damn, that girl is bangin'.

- Man, she's a 15 on The 5-5-5 Scale.
by j5l5 September 23, 2012
mugGet the The 5-5-5 Scale mug.

National Suck That 5'5 guys dick at the mall day

Suck that one 5'5 guy who you brought to the mall dick
"Bro its National Suck That 5'5 guys dick at the mall day and I'm 5'5 at the mall!"

violently gargles on his dick
by gayfigger November 20, 2022
mugGet the National Suck That 5'5 guys dick at the mall day mug.
Something that can’t fit through something in any possible way in any circumstance
Blarg: MY SCHOOL BUS IS TO BIG! ITS LIKE SHAQUILLE O’NEAL FUCKING A 5’5 GIRL

Nogla: I feel like you’ve searched that?
by youngspartan530 August 17, 2022
mugGet the Shaquille O’Neal Fucking a 5’5 Girl mug.

5.56x45mm NATO

One of NATO's military firearm calibers. The 5.56x45mm NATO catridge is used pretty much only for allied (America, UK, France, Germany, etc) assault rifles.

China even uses this caliber for their T95 battle rifle.
The civilian 5.56x45mm NATO round is the .223 Remington.
by Dave February 1, 2004
mugGet the 5.56x45mm NATO mug.
Describing something that cannot fit in any circumstance in any eay
Blarg: MY SCHOOL BUS DONT FIT! ITS LIKE SHAQUILLE O’NEAL FUCKING A 5’5 GIRL!

Nogla: I feel like you’ve searched that?
by youngspartan530 August 17, 2022
mugGet the Shaquille O’Neal fucking a 5’5 girl mug.

5:53

ITS BLUE HOUR!!!
5:53 is basically the equivalence to blue hour!!
(stan txt)
by viocidal August 27, 2023
mugGet the 5:53 mug.

Share this definition

Sign in to vote

We'll email you a link to sign in instantly.

Or

Check your email

We sent a link to

Open your email