Kawaii & Fierce
There is nothing like this currently on the market: a complete 5″ 556 upper receiver ready to drop in and use!
This completed upper comes equipped with a Holosun HS503CU optic, Surefire Warden, Surefire Socom Brake (for extra loudness), our rail mounted tactical flashlight and a few other bells and whistles that no other company currently offers.
A Tactical Work of Art
It’s fun to look at this but it’s more fun to shoot!
It’s loud! Like -everyone at the range will stop and look over at you when you shoot this, LOUD!
It’s fun! Like -after the people at the range realized that no, a grenade didn’t just go off, they’ll want to shoot it too!
There are a few different options to choose from, but all of these options contains the same Mini 5″ 556 Complete Upper.
Complete Upper Components
- KTactical BAT Charging Handle
- F-1 Firearms TiN Coated 556 BCG
- KTactical AR15 Upper Receiver 7075
- KTactical Anti-Rotation Insert (Red)
- SLR Rifleworks ION 4.25″ MLOK Handguard 7075
- KTactical 5″ TiN Coated Barrel (1/6 Twist 5R Rifling)
- Surefire SOCOM Muzzle Brake
Additional Accessories / Kit Options
- Holosun HS503CU
- 3 Slot MLOK Rail 7075
- SLR Rifleworks Handstop Mod1
- Surefire Warden
- KTactical Rail Light
- Pistol Brace Kit
- Fortis K2 (Red) Locking Castle Nut Kit
Only the Highest Quality
We did not cheap out on ANY component of this upper receiver. All the parts are of the highest quality.
This was designed so that most people would not want to replace any part of this upper with something else (of course you can do whatever you want).
All of this comes pre-assembled, test fired, and the gas block is tuned to work perfectly with our H3 Buffer and Low Power Flat Spring!
What is keyholing? Keyholing is when the bullet looses its stability in flight and begins to tumble in the air. Obviously this is not good for long range or accuracy. Sometimes the bullet will hit a target and leave an ovular shaped hole in the target, sometimes called a keyhole.
Unlike other micro 556 uppers, we did not experience any keyholing with our upper up to 25 yards out. Our Micro 5″ 556 AR upper is accurate and precise (for a 5″ barrel)!
Yes Lockback! Unlike other micro upper receivers that claim “no lockback” as if it’s some kind of feature, our Kawaii 5″ Micro Upper locks back on the last shot!
Just use our H3 Buffer and Low Power Flat Spring!
Note: If you are using something like a BAD lever or extended / ambidextrous bolt catch you might not have bolt lockback on the final shot.
Note: The flat buffer spring is a modified, low power, flat wire spring. We STRONGLY recommend only using our low power spring + H3 buffer combo for optimal performance.