I really could use some clarification, some of the comments say this is the 3 millimeter walls and some say it's the one 1.5mm. Which one is this?

Since you didn't specify whether you're looking at the 4 ft. blowpipe or the 5 ft. blowpipe, I can't really say what 'this' is. But I can tell you that the 4 ft. blowpipe is the heavier wall tube and the 5 ft blowpipe is the thinner wall tube.

How large of an animal will this put down?

With extremely good accuracy and skill with this blowgun, you could take down game as large as a deer, however this is something I would not attempt unless you were very very adept and it was legal. For me I wouldn’t shoot anything large than a crow or squirrel.

Is this able to shoot .40 cal darts or does cold steel make a .40 cal blowgun

I don't know if the .357 will shoot .40 cal darts, but given the measurements, I would guess and say no because of the size; I own a Cold Steel .357 and .625, as far as I know, these are the only two blowguns sizes that Cold Steel makes.

Will the two foot extension fit on this?

As long as it’s not a Pro version, yes. You can expect around a 9 fps (for 5’ blowgun) to 16 fps (for 4’ blowgun) velocity increase.

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Cold Steel Big Bore Blowgun Kit, 625 Blowgun, 4 ft.

Product ID: 39248908

Details

Air Gun Power Type
Barrel Material Type
Alloy Steel
Brand
Cold Steel
Caliber
0.625
Color
Black
Global Trade Identification Number

🎒36-dart full accessory kit

🎯20+ yard precision range

🛠️.625 Magnum barrel power

¥55227

Duties & taxes included

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Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🎯 Dominate your target practice with Big Bore power and precision!

OPTIMAL 4 FOOT LENGTH - Balanced design maximizes dart velocity while maintaining portability for on-the-go pros.
EXTENDED EFFECTIVE RANGE - Consistently hit small targets beyond 20 yards—master your aim and own the range.
COMPLETE READY TO USE KIT - Includes mouthpiece, rubber ferrule, dart quiver, and 36 versatile darts for immediate action.
UNMATCHED POWER ACCURACY - Oversized .625 Magnum barrel delivers heavyweight darts at blistering speeds for pinpoint precision.
SKILL BUILDING OUTDOOR ESSENTIAL - Enhance hand-eye coordination and focus with a fun, challenging activity perfect for all weather.

The Cold Steel Big Bore Blowgun Kit features a robust .625 Magnum barrel and a 4-foot length, enabling skilled users to shoot heavier, faster darts with remarkable accuracy up to 20 yards. This all-inclusive kit comes with a mouthpiece, rubber ferrule, dart quiver, and 36 darts (bamboo, broadhead, and stun types), making it perfect for outdoor enthusiasts seeking a powerful, skill-building recreational tool.

Specifications

ASIN	B019LIO6Y2
Age Range Description	Adult
Best Sellers Rank	#48,491 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #135 in Hunting & Tactical Knives & Tools
Brand Name	Cold Steel
Color	Black
Customer Reviews	4.5 4.5 out of 5 stars (142)
Global Trade Identification Number	00705442014027
Included Components	Knife
Item Dimensions	50.5 x 8.25 x 8.25 inches
Item Length	48 inches
Item Type Name	BLOW GUN
Manufacturer	GSM Outdoors
Manufacturer Part Number	CS-B6254Z
Manufacturer Warranty Description	Knives & Blades: We stand behind our products 100%. We subject them to the highest standards in the industry and strive to make each as perfect as possible. We warrant that this product is free of defects in workmanship and materials. This warranty does not cover normal wear and tear, resharpening, damage caused by misuse, lack of normal maintenance, or disassembly. Remember, anything can break or…
Material Type	Aluminum
Model Number	CS-B6254Z
Number of Items	1
Number of Packs	1
Operation Mode	manual
Power Source	manual
Set Name	Cold Steel Big Bore Blowgun Kit
Size	Large
Special Features	Foldable
Style	.625 Blowgun - 4 ft.
Supported Battery Types	No batteries required.
Target Audience	Adult
Theme	Outdoor Activities
UPC	705442014027
Unit Count	1 Count

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TrustScore 4.5 | 7,300+ reviews

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