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King Arms Limited Edition Skull Frog Lower Receiver with 8mm Gearbox Front Wired (300mm)

ID: 54088 (GB-KA-300)
King Arms / Eagle Force54088
4.0 stars, based on 1 reviews
z King Arms Limited Edition Skull Frog Lower Receiver with 8mm Gearbox Front Wired (300mm)
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Sorry, this item is Discontinued

CanadaExport Compliant
This gun has a muzzle velocity rating (FPS) between 366 and 500, and is compliant for export to Canada.

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A perfect base for any field gun build, the King Arms Limited Edition complete lower offers an easy solution to building up your own custom gun. The lower comes with one of King Arms time tested 8mm LiPo ready gearboxes, which provides 400 - 420 feet per second (depending on barrel length). To top off the high quality build of this lower, it comes with laser engraved Skull Frog trademarks, to give it an aggressive look.

This gearbox is for use with 280-300mm inner barrel lengths


  • LiPo ready
  • 8mm pre-upgraded gearbox
  • Front wired
Length: 200mm
Weight: 2.68lbs
Magazine Compatibility: Works with Matrix, G&G, Tokyo Marui and other compatible M4 / M16 Series Airsoft AEG Magazines
Muzzle Velocity: 400~420 FPS (Measured with 0.20g BBs)
Gearbox: Ver 2 Full Metal, Fully Upgradeable
Motor: Long Type
Fire Modes: Semi/Full-Auto, Safety

Manufacturer: King Arms

FPS Range: 400-420

1 Customer Review

(Write a review)

by John Harry H. on 07/19/2017
"First off, this is not a 8mm gearbox. I received one with 7mm ball bearings. The air nozzle does not have an o-ring. Both the spring guide and piston head do not have bearings. The piston head is not bad, but I would replace the o-ring with a Danco #14 (or similar) o-ring. The piston has a metal release tooth. The gearbox was also radius'd.

The metal lower is not bad with attractive trades and has a matte black finish. The body pins are not one piece. The buffer tube is commercial spec and can be used if you plan to rear-wire this. The pistol grip is nice and has metal threads for the motor plate.

A pretty good deal for the price.

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This item is Discontinued.