WM Colt M4 DD MK18 GBBR Gel Blaster (Like New)
Quick Answer: A like-new WM Colt M4 with a Daniel Defense MK18 handguard, running the MWS (ZET System) gas blowback platform — barely fired, kept in its carry case since new. Comes fitted with a Sig Romeo5 red dot and a stubby foregrip, plus a spare magazine and extras. No faults. Pickup from Margate, 4019, QLD or shipped QLD-wide, adults 18+.
This one barely got used. The seller bought it brand new, fired it a handful of times, then it sat in the carry case — so you're buying a blaster in as-new condition without paying the new-in-box price. It's a WM Colt M4 running the MWS (ZET System) gas blowback platform with a Daniel Defense MK18 handguard, which is one of the more sought-after builds on the market right now — the exact same model is currently sold out at retail.
It's not stock either. A Sig Romeo5 red dot is already mounted and zeroed in, along with an MOE stubby foregrip, so it's ready to pick up and shoot straight out of the case. A spare magazine and a few extras come with it too.
What's in the box
✔ WM Colt M4 GBBR
✔ Sig Romeo5 Red Dot
✔ MOE Stubby Foregrip
✔ Spare magazine
✔ Extras included
Features
MWS (ZET System) GBBR
Gas blowback, not electric — a heavier, more realistic feel and cycle than a standard AEG.
Daniel Defense MK18 handguard
A genuinely sought-after handguard profile, not a generic clone rail.
Like-new condition
Fired a handful of times, then stored in the carry case. No faults.
Optic already fitted
Sig Romeo5 1x20 red dot mounted and ready — no separate optic to buy or zero.
Stubby foregrip
MOE-style foregrip fitted to the rail for a solid front-hand hold.
Spare mag + extras
A second magazine and a few extras come with it — less to buy on day one.
Condition
Like new, no faults. The seller bought it brand new, fired it only a handful of times, then it lived in the carry case rather than getting used. It's being sold because it's not getting the game time it deserves, not because anything's wrong with it. Whether you pick up or have it shipped, payment runs through RedSpear, not person-to-person, so you're covered either way.
Who this suits
- Buyers after a GBBR without paying full retail
- Anyone who wants the optic and foregrip already sorted
- Players chasing the MK18 look and gas-blowback feel
- Margate, 4019, QLD pickup or QLD-wide shipping
🟣 Sold out new is exactly why the used price works
This exact build — the WM Colt M4 with the Daniel Defense MK18 handguard — is currently sold out at full retail. That's not a coincidence for MWS (ZET System) GBBRs generally: gas blowback builds sell out faster than they get restocked because they're a step up from a standard electric build and there simply aren't that many made. When the new stock dries up, a barely-used private listing like this one is often the only realistic way to get the platform without going on a waitlist and hoping. Buying private through a managed marketplace closes the gap that usually makes people nervous about second-hand GBBRs — you get the platform now, at a fair price, with the payment held until you're happy.
Pickup Margate, 4019, QLD or shipped QLD-wide
Collect in person from Margate, 4019, QLD, or have it shipped tracked anywhere in Queensland with postage included in the price. Payment runs through RedSpear, not person-to-person. Queensland 18+ buyers only. Open to offers.
Frequently asked questions
What's included?
The WM Colt M4 GBBR itself, fitted with a Sig Romeo5 red dot and a stubby foregrip, plus a spare magazine and a few extras. No faults and nothing to fix before your first game.
Is it actually like new?
Yes. The seller bought it brand new, fired it only a handful of times, then it sat in the carry case rather than getting real game time. No faults, no repairs, nothing to disclose beyond normal light use.
What platform is it?
It's a WM Colt M4 with a Daniel Defense MK18 handguard, running the MWS (ZET System) gas blowback platform — not a standard electric AEG. That means a heavier, more realistic cycle, and it's currently sold out new at full retail.
Is it pickup or can it be shipped?
Both. Pick it up in person in Margate, 4019, QLD, or have it shipped tracked anywhere in Queensland with postage included in the asking price. Payment still runs through RedSpear either way, so you're protected. Browse more on the marketplace .
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.
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 .
Gel blasters are legal for adults 18+ in Queensland — see the QLD gel blaster laws guide . More rifles on the marketplace .