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Home » Accessories & Parts » AEG Internal Parts » Gearbox Tune-Up Kits

Guarder Bore-Up Cylinder Set for Airsoft AEG Gearboxes
(Model: M4A1)

ID: 28017 (FTK-GL-03-40)
GL-03-40
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Guarder / Intruder Shop

$54.99

Model Options:
ModelAK47$54.99
ModelAUG$54.99
ModelG36$32.99
ModelM16-A1$54.99
ModelM16A2$54.99
ModelM4 CQB-R$32.99
ModelM4A1$54.99

Description

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Reviews

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Product Description

Features

  • Increases stock FPS by 10~30 FPS
  • Silencer piston head allows a more stealth AEG operation
  • Replaces stock cylinder sets for higher power output and performance
  • Allow usage longer inner barrel (more air in cylinder)
  • A great alternative way to increase FPS output without using a stronger spring
  • Stronger spring means lower ROF (rate of fire) and higher rate of wear and tear

Manufacturer: Guarder

Bore Up?
Bore up Cylinder sets are made to fit all gearboxes just like the regular cylinder sets. However, the cylinder is thinner and made with a bit more precision enabling a bigger air storage in your cylinder. The cylinder head and piston head are of course, a bit bigger as well resulting a higher muzzle velocity and power output.
Recommended for 360 FPS and higher power AEGs
Bore up parts feature larger inner diameters to increase air volume for each shot. Bore up parts must be used with other compatible bore up internal parts.

13 Customer Reviews

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by Reed H. on 12/30/2019
"Installed in my super custom CYMA M4. I have been considering getting a bore up set for a while and I wasn’t disappointed. The 40FPS increase is pretty impressive considering I was originally using a mix of ZCI and lonex parts that got a great air seal. Overall good price and great quality.
by Michael H. on 02/05/2019
"I purchased this for my Kwa M4 sounds more powerful don't have chronograph added 469 mm tight bore 6.01mm stock barrel was 393 mm shoots flat to about 200 ft.cylinder is a little longer than stock, had to modify very small amount. Stock piston fell through the upgraded cylinder hotdog down hallway LOL.
by Lance C. on 01/10/2015
"I don't know if it's the bore-up (doubtful) or just the quality of the parts in achieving airseal, but I've installed this in two different gearboxes with no tricks like teflon or permatex, no extra o-rings or anything, and with an AIM torque gearset, a fresh m120 and 407mm 6.03 inner barrel it consistency pulls 420-430 fps where before these gearboxes were struggling to reach 360.

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Guarder / Intruder Shop