M4-Style Mid-Cap Gel Blaster Magazines (Used)
Quick Answer: Used M4-style mid-cap gel blaster magazines (PMAG pattern), about six months old and in perfect working order — every one feeds and spring-loads cleanly. They fit M4, MK18 and HK416-pattern gel blasters that take M4-style mags. Grab one, or take three or five for a better rate. Pickup or shipping within Queensland, adults 18+.
The upgrade every player under-buys until game day catches them out: spare mags. These are M4-style mid-caps off my own MK18s — about six months old, run and looked after, and every one still feeds and spring-loads perfectly. Buy a single to round out your loadout, or take three or five and never stand behind cover topping up one mag again.
Honest note: there’s a little glue residue at the base of each where I’d stuck name tags on — purely cosmetic, and it wipes off if it bothers you. Everything that matters mechanically is spot on.
Why these mags
Perfect working order
All five feed and spring-load cleanly — no weak springs, no feed dramas.
M4 / MK18 fit
Standard M4-style pattern — suits M4, MK18 and HK416-style gel blasters that take M4 mags.
Mid-cap — no rattle
Mid-caps don’t slosh a hundred loose gels around, so you move quiet — the milsim pick.
Buy one or bundle
Take a single, or three or five for a better per-mag rate. Only five available.
Condition
Used, about six months old, and in perfect working condition — every mag feeds and spring-loads as it should. The only cosmetic note is a little glue residue at the base from old name tags, which wipes off. As with every listing on RedSpear, payment runs through RedSpear, not person-to-person.
Who these suit
- M4, MK18 and HK416-style blaster owners
- Anyone short a mag or two for game day
- Milsim players who want quiet mid-caps
- A cheap way to build a full mag loadout
🟣 Store your mags empty and they’ll outlive your blaster
Here’s the mag tip almost nobody follows: don’t store a gel mag fully loaded for weeks on end . Leaving the follower spring compressed between games is what slowly tires it out, and a tired spring is the number-one cause of the mid-game feed stutter everyone blames on the blaster. Load up on the morning of a game, unload what’s left when you get home, and a good mag spring lasts years. These five were looked after exactly that way, which is why they all still feed like new — and it’s the same habit that’ll keep them going for the next owner.
Pickup or shipping — Queensland
Small and light, so easy to post anywhere in Queensland — or arrange local pickup. Payment runs through RedSpear, not person-to-person. Queensland 18+ buyers only.
Frequently asked questions
What blasters do these fit?
They’re M4-style (PMAG pattern) mid-caps, so they suit M4, MK18 and HK416-style gel blasters that take M4-style magazines. Mag fit can vary slightly between brands, so if you’re unsure, check that your blaster runs M4-pattern mags before buying.
What condition are they in?
Used, about six months old, and in perfect working order — all five feed and spring-load cleanly. The only mark is a little glue residue at the base of each from old name tags, which is cosmetic and wipes off with a bit of isopropyl.
Are these mid-caps or hi-caps?
Mid-caps — you load them to a set capacity rather than pouring in a big loose reservoir. The upside is no rattle when you move, which is why mid-caps are the milsim and stealth pick. Check the photos for the mags themselves.
How many can I buy?
There are five available. You can buy a single, or take three or five together for a better per-mag rate — the discount applies automatically at checkout. Once the five are gone, that’s it.
Are gel blasters legal in Queensland?
Yes. Gel blasters and their accessories 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 .
How are they shipped?
They’re small and light, so they post easily anywhere in Queensland, or you can arrange local pickup. Payment runs through RedSpear either way, so you’re protected.
Gel blasters are legal for adults 18+ in Queensland — see the QLD gel blaster laws guide . More parts and gear on the marketplace .