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AIRSOFTCON 2026 - October 17, 2026
Home » Airsoft Accessories, Attachments & Parts » Gas Gun Parts » Inner Barrels (Gas Guns)

Poseidon Air Cushion 6.05mm Inner Barrel for Tokyo Marui Gas Blowback Airsoft Guns
(Model: Gen 1 / 640mm)

ID: 70889 (BRL-BR-POS-PG020)
BR-POS-PG020
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Poseidon

$85.00 $77.00

Order within 5 hours 50 minutes Receive as soon as Thu Jul. 16
Model Options:
Gen 1Gen 1
Gen 2Gen 2
Options:
100mm$13.50
138mm$29.00
145mm$29.00
165mm$32.00
229mm$35.00
275mm$39.95
363mm$47.00
407mm$50.00
455mm$52.00
470mm$59.00
509mm$52.95
550mm$27.60
640mm$77.00
80mm$25.00
84mm$27.00

Description

Specs

Reviews

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Product Description

Features

  • High quality, heavy duty nickel plated copper construction
  • Precision 6.05mm inner diameter
  • Grooved channel has your BB riding on an air cushion to reduce friction and drag
  • Heavy weight, rigid barrel minimizes barrel vibration, improving accuracy and consistency
  • Gen 1 barrels are not compatible with different brands of hop up buckings. Poseidon hop-up buckings are recommended.

Manufacturer: Poseidon

Note: Not compatible with different brands of hop up buckings. Poseidon hop-up buckings are recommended.

10 Customer Reviews

(Write a review)

by Joey M. on 12/20/2025
"Bought this in improving accuracy:
Note: skeptics with bore size (6.05)
Results: Tighter grouping; Consistent trajectory; Minimal deviations (8/10 shots)
BB used: 32
Bucking: 4QUAD

Get it for improved accuracy and consistency!
by Joey M. on 12/20/2025
"Bought this in improving accuracy:
Note: skeptics with bore size (6.05)
Results: Tighter grouping; Consistent trajectory; Minimal deviations (8/10 shots)
BB used: 32
Bucking: 4QUAD

Get it for improved accuracy and consistency!
by Malcolm C. on 11/01/2023
"The best in its class, yet underused


Lots of people in the airsoft world love to rep other inner barrel brands, but this one is the best overall.

The Poseidon inner barrels allow for an unparalleled range performance, and I can give confirmation based on how I built a friend's TM AKX.

The TM GBB AK apparently doesn't hop .28s very easily, but with a 2023 Maple Leaf Autobot and this brand barrel (300mm), it hopped .32s and .28s with no issue. Mind you this was with no mods to the Hopup itself

Now imagine that in a pistol.

This doesn't necessarily mean every gun should have one though, if your hopup can hop heavy BBs already then don't worry about installing this unless the trajectory starts falling early.

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Parts and accessories may not be compatible with the product displayed on this page. For compatible parts/accessories, see the You May Also Need section and please verify details on the product description page.

Poseidon