Does this work for the jt er2 pump pistol rts kit

The ones I am selling are standard size. So I think they are universal fit. If you want to try them out, if they don't fit you can send them back to me for refund.

No, the ones i'm selling aren't threaded.

Will these cartridges fit a Umerex BB pistol?

I used them for my Umarex SA.177 Co2 gun. There a specification for "grams" that your BB gun uses. I beleive these your asking about are 12 grams which relates to size and pressure.

is it 12 Grams per cartridge, or 1.2 per cartridge?

Each cartridge holds 12 grams of liquid CO2. Be sure to select Paintball Discounters as your Amazon fulfillment partner.

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12 Gram CO2 Cartridge for Airsoft Guns- 10 Pack

Product ID: 1667199

Details

Brand
SDNselect
Color
Silver
Item Weight
14.4 ounces
Operation Mode
Manual
Power Source
Handheld

🎯Exacting fit & seal

🔄Consistent rapid fire

🔋12g pure CO2 power

€ 32.79

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Sold byAmazon SlovakiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔥 Stay charged, stay ahead – never miss a shot!

BULK 10 PACK VALUE - Stay tournament-ready with a full set of cartridges, so you never run dry mid-game.
PRECISION FIT SEAL - Engineered tolerances ensure a perfect seal in virtually all gas-operated airsoft and paintball guns.
CONSISTENT RAPID FIRE - Maintain your competitive edge with steady gas flow for fast, uninterrupted shooting.
PURE 12 GRAM CO 2 POWER - Delivers reliable, high-pressure gas for peak performance every shot.
VERSATILE COMPATIBILITY - Works seamlessly with airsoft, paintball, and other CO2-powered devices—one pack, endless action.

This 10-pack of SDNselect 12 Gram CO2 cartridges offers pure, high-pressure gas with exacting tolerances for a perfect fit and seal in most gas-operated airsoft, paintball, and airgun devices. Designed for consistent, reliable performance, these cartridges keep your rate of fire fast and steady, making them essential for serious players and competitive shooters.

Specifications

Asin	B0012Q8I6E
Best Sellers Rank	#115,294 in Sports & Outdoors (See Top 100 in Sports & Outdoors) #27 in Bike CO2 Pump Systems
Brand Name	SDNselect
Color	Silver
Customer Reviews	4.6 4.6 out of 5 stars (4,465) 4.6 out of 5 stars
Item Weight	14.4 ounces
Manufacturer	SDNselect
Manufacturer Part Number	2514556
Number Of Items	10
Number Of Packs	10
Operation Mode	Manual
Power Source	Handheld
Unit Count	1 Count
Upc	796254089082

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€ 32.79

Duties & taxes included

In stock

Sold byAmazon SlovakiaDelivered 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 Slovakia.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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