Would these work in the umarex T4E HDP.50? Or only the tr50 revolver.

Based on the loading mechanism on the HDP.50, I don't think it will work.

Whats the red thing around steel ball?. Got steel balls but no red things. What are they?

The red thing is a plastic sleeve that holds the steel ball in place to fire from a 50 cal air gun magazine. It fires as one piece. The steel ball does not separate from the plastic when fired.

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Heavy Duty Steel Core Devastator Self Defense Projectile Ammo .50 Caliber for HDR50 and TR50, Red

Heavy Duty Steel Core Devastator Self Defense Projectile Ammo .50 Caliber for HDR50 and TR50, Red

Product ID: 396733978

Details

Brand
Modern Combat
Color
Red
Size
0.50"
Sport
Close Quarters
Style
Combat Sports

💥Maximum impact & penetration

🔴Distinctive red color for quick ID

🛡️Steel core for ultimate durability

€ 97.06

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Description

🔴 Dominate your defense with every shot — power meets precision.

STAND OUT WITH RED - Bold red casing ensures quick identification and adds a tactical edge.
PRECISION PENETRATION - Stabilized full metal jacket with steel core pierces glass, plywood, and thin metal effortlessly.
TRUSTED BY PROFESSIONALS - Rated 4.6 stars by nearly 500 users who demand reliability in close quarters.
UNMATCHED STOPPING POWER - Experience the most powerful self-defense ammo on the market.
DESIGNED FOR HDR 50 TR 50 - Perfectly calibrated .50 caliber rounds tailored for your high-performance firearms.

Modern Combat Sports Heavy Duty Steel Core Devastator .50 Caliber ammo delivers maximum impact and penetration with a stabilized full metal jacket and steel core. Engineered for HDR50 and TR50 firearms, this red projectile excels in close quarters battles, effectively penetrating glass, plywood, and thin sheet metal. Trusted by professionals and rated 4.6 stars, it’s the ultimate choice for serious self-defense.

Specifications

ASIN	B09M2BHRPM
Best Sellers Rank	#180,271 in Toys & Games ( See Top 100 in Toys & Games ) #177 in Toy Foam Ammunition
Brand Name	Modern Combat Sports
Caliber	0.5
Color	Red
Cross Section Shape	Round
Customer Reviews	4.6 4.6 out of 5 stars (490)
Item Weight	4.7 g
Shape	Round
Size	0.50"
Sport Type	Close Quarters Battles (CQB)
Style Name	Combat,Sports
UPC	810093330041
Unit Count	1 Count

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€ 97.06

Duties & taxes included

In stock

Sold byAmazon FranceDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to France.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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