Does it fit in a byrna?

These are 50 Cal aluminum balls which fit for T4E TR 50, HDP 50, etc. If you're looking for 68 Caliber balls, please try this: https://www.amazon.com/gp/product/B0BZRKHBKD

How much does one ball weight in grams and also what is the actual diameter of one ball?

These are a hard plastic. They are .50 caliber which is 1/2 inch They are pretty light weight

Will they stop a person or put them down

That I imagine would all depend on the person and if any thickness of clothing or armor to be a factor but it would hurt, I would imagine, and change most people minds of possibly doing you harm

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Alien Play 100 x 50 Cal. Aluminum Balls for Self Defense Fit for TR50

Alien Play 100 x 50 Cal. Aluminum Balls for Self Defense Fit for TR50

Product ID: 781023516

Details

Brand
Alien Play
Colour
Silver
Model Name
50 Cal. Hard
Size
50. Cal
Sport
Target

🎯Uniform .50 Cal size - precision fit & velocity

🔋2.8g weight - optimal impact power

⚙️7075 Aluminum Alloy - ultra durable

Description

🚀 Dominate your defense with precision-packed power!

READY FOR ACTION - Comes in a rugged wild-mouth bottle for easy carry and rapid reloads—never miss your moment.
OPTIMAL 2 8 G WEIGHT - Perfectly balanced for maximum stopping power in self-defense revolvers and launchers.
REUSABLE RELIABLE - Ultra-round, deformation-free design guarantees smooth shooting and multiple uses without jams.
PRECISION 50 CALIBER FIT - Snug, gas-tight fit ensures consistent velocity and accuracy shot after shot.
ELITE GRADE 7075 ALUMINUM ALLOY - Engineered for unmatched strength and high-impact penetration, outperforming rubber and nylon alternatives.

Alien Play 100 x .50 Cal Aluminum Balls are crafted from premium 7075 aerial aluminum alloy, delivering superior impact and penetration for self-defense and target shooting. Each 2.8g round fits perfectly in TR50 and similar launchers, ensuring consistent velocity and accuracy. Designed for durability and reusability, these ultra-round projectiles come in a heavy-duty bottle for convenient transport and rapid deployment.

Specifications

ASIN	B0BZRGDF7N
Best Sellers Rank	#366,442 in Toys & Games ( See Top 100 in Toys & Games ) #294 in Toy Foam Ammunition
Brand Name	Alien Play
Caliber	0.5
Colour	Silver
Country Of Origin	USA
Cross Section Shape	Round
Customer Reviews	4.5 4.5 out of 5 stars (655)
Item Highlight	2.8 Gram Reusable .50 Caliber Aluminum Paintballs Ammo Projectiles for Training Fit for t4e HDR 50 Target Shooting
Item Shape	Round
Item Weight	2.8 Grams
Manufacturer	Alien Play
Material Type	Aluminum
Model Name	50 Cal. Hard Projectiles
Number of Items	100
Size	50. Cal
Sport	Target Shooting
Whats In The Box1 - Whats In The Box3	hard material

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