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EMG F1 UDR Custom DSG Gel Blaster - Brushless, Gate Aster
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You get a full refund. No chasing the seller yourself, no private-sale risk.
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Every seller is reviewed before their listing goes live. 18+, Queensland-only trading.
Quick Answer: A custom-built EMG F1 UDR gel blaster set up for speedball, with an Aztech Scythe CNC gearbox running a dual sector gear (DSG), a Warhead brushless motor, a Gate Aster mosfet and an adjustable-speed trigger. Like new: used at one competition, then back to the shop for gearing changes, and only test-fired since. Comes with two magazines and a battery. Adults 18+ only.
🚚 PICKUP OR SHIPPING · Harlaxton, 4350, QLD
Collect in person, or have it posted anywhere in Queensland. Postage is included in the price.
🏷 Open to offers
This is the blaster you build when you already know what you want from a game: fast trigger response, a high rate of fire and very little weight to carry between bunkers. It starts on the EMG F1 UDR, the AR-pattern platform with the skeletonised receiver, and the internals have been swapped out almost entirely for top-shelf parts. The seller describes it as incredibly light and easy to use, and built as a dedicated speedball blaster.
It ran at one competition, then went back to the shop for gearing changes. Since then it’s only been test-fired. It fires on semi and full auto, but the seller recommends semi only because of the DSG gearing (the box below explains why). No known faults.
What’s included
✔ EMG F1 UDR custom blaster
✔ 2x magazines
✔ Battery
The build
Aztech Scythe 7075 CNC V2 gearbox
A CNC-machined 7075 aluminium gearbox shell in place of the stock one, built to take the stress of a fast-cycling setup.
Dual sector gear (DSG)
Two shots per sector gear turn instead of one. That’s where the rate of fire and the snappy trigger come from.
Warhead brushless 30k motor
A Warhead Industries brushless 480 long-type motor rated at 30,000 RPM. Here’s why motor choice matters on a used build.
Gate Aster mosfet
Gate’s programmable unit, protecting the trigger contacts and running the motor. More on what a mosfet actually protects.
Aztech Xtreme Aster adjustable trigger
An adjustable-speed trigger made to pair with the Aster, so you can tune how it feels and responds.
Aztech Apache cylinder head
Aztech’s air-pressure-activated cylinder head, the same maker as the gearbox and trigger, so the core parts were chosen to work together.
Condition
Like new. Used at one competition, then sent back to the shop for gearing changes, and only test-fired since. The seller reports no issues or faults. It fires on semi and full auto, with semi recommended because of the DSG gearing. Metal body, according to the seller. As with every used listing on RedSpear, what’s described is what you get: verified seller, and payment runs through RedSpear, not person-to-person.
Who this suits
- Speedball players who want a fast, light blaster without building one
- Upgraders who’d rather buy the parts already fitted and tuned
- Players who mostly shoot semi and want the quickest trigger they can get
- Darling Downs buyers: pickup in Harlaxton, 4350, QLD (see used gel blasters in Toowoomba)
🟣 Why the seller says “semi only” on a DSG build
A dual sector gear fires twice for every turn of the sector gear, so the piston and spring cycle twice as often for the same motor work. On semi, that turns into a near-instant shot the moment you pull the trigger. Held down on full auto, it wears the spring and piston much faster. Custom builders who sell DSG blasters say the same thing: run them on full auto a lot and they turn into high-maintenance builds. So the “semi only” advice isn’t a fault. It’s how you get the speed without the wear.
Pickup or shipping: Harlaxton, 4350, QLD
Collect in person from Harlaxton, 4350, QLD, by appointment arranged after purchase, or have it sent with tracked postage anywhere in Queensland. Postage is already in the price. Collect it and you can check it over before you take it home. Payment runs through RedSpear, not person-to-person, so you’re covered. Open to offers. Queensland 18+ buyers only.
Frequently asked questions
What’s included?
The custom EMG F1 UDR blaster with all the upgrades listed above, two magazines and a battery. It takes 7-8mm gels, which need growing before use (see our guide to growing and storing gels), and you’ll want eye protection before your first game.
Is it hard to look after?
Not if you use it the way it was built: mostly on semi. A DSG build cycles fast, so heavy full-auto use wears springs and pistons sooner. If it ever needs a service, one of our approved Queensland gel blaster techs can work on it.
Can it be posted, or is it pickup only?
Both. Collect it from Harlaxton, 4350, QLD by appointment after purchase, or have it posted with tracked postage anywhere in Queensland. Postage is included in the price. Picking up? Our used gel blaster inspection checklist covers what to check.
Can I make an offer?
Yes. The seller is open to offers below the asking price. Use the Make an Offer button on this page to send one. If it clears the seller’s minimum it’s accepted automatically; otherwise it goes to the seller to review.
Is this a good first blaster?
It’ll work for anyone, but it’s really built for players who already know they want speed. If you’re new, the upgrade cards above explain what each part does, so you can judge whether you’d use them.
Are gel blasters legal in Queensland?
Yes. Gel blasters are legal for adults aged 18 and over in Queensland, with no licence required, provided you follow the usual storage, transport and venue rules. See our Queensland gel blaster laws guide for the full picture.
Gel blasters are legal for adults 18+ in Queensland. Find somewhere to run it on the QLD fields and stores map. More rifles on the marketplace.