Sizing a gun safe for your firearms licence is about matching internal rack capacity, ammunition storage and steel rating to the categories you hold — not picking the biggest box that fits in the garage. Get the numbers wrong and you either waste money on unused space or fail a compliance check when police turn up for a licence renewal.
- How to size a gun safe starts with counting firearms you own now plus 2-3 slots for growth, not maximum capacity.
- A 10-rifle rack like the Secuguard GS3K suits Category A, B, C, D and H licence holders with growing collections — Buy.
- Undersized racks bend barrels and fail NSW and QLD compliance checks — never stack rifles to save space.
- Ammunition needs a separate locked container from firearms under most state licence conditions — budget for that space too.
Why this matters
Every Australian state issues firearms storage conditions tied to your licence category — A, B, C, D or H — and the safe you buy has to satisfy those conditions on the day an inspector shows up, not just look roomy in a photo. A safe that's too small forces rifles to lean against each other, bends barrels against internal racks, and reads as non-compliant the moment an officer opens the door.
Most buyers size a gun safe once, in 2026, and expect it to last a decade of licence renewals. Getting the count right the first time avoids buying a second safe in 18 months because the first one filled up.
What you'll need
- Your current firearms licence and the categories listed on it (A, B, C, D, H)
- A tape measure for barrel length, stock length and the space where the safe will sit
- The make and model list of every firearm you currently own
- A realistic estimate of firearms you'll add in the next 2-3 years
- Masonry anchor bolts if the safe will sit on a concrete slab
- A model that separates ammunition storage from the firearm compartment, such as the Secuguard GS3K CAT A/B/C/D/H 10 rifle gun safe
The steps
1. Count what you own today
List every firearm on your licence by type — bolt-action rifle, lever-action, shotgun, handgun. This number is your floor, not your ceiling. A shooter with 4 rifles and 1 shotgun needs a minimum 5-slot rack, not a 10-slot cabinet bought on instinct.
Common mistake: buying exactly to the number owned in 2026 and having zero room left the first time you add a firearm.
2. Add headroom for growth
Buy 2 to 3 slots beyond your current count. Collectors and hunters who add one or two firearms a year run out of rack space fast in a tightly-sized safe. A shooter storing 5 rifles today is a good candidate for the sizing approach covered in this gun safe sizing guide for a five-rifle collection — buy one tier above your current headcount, not at it.
3. Match rack style to firearm type
Rifle racks hold long arms vertically by the barrel or muzzle; handguns need individual lockable trays or a dedicated pistol compartment. Mixing rifles and handguns in one open rack is common and it's wrong — pistols need separate, individually secured storage inside the cabinet, not a shared shelf.
4. Check internal height against barrel length
Full-length hunting rifles run 1,050mm to 1,200mm with stock attached; compact carbines sit under 900mm. Measure your longest firearm stock-to-muzzle and compare it against the safe's internal height listed on the spec sheet — not the external cabinet height.
Expected outcome: every rifle stands fully upright with clearance above the muzzle, no leaning, no touching the roof.
5. Plan separate ammunition storage
Most state licence conditions require ammunition locked away from the firearm itself, either in a separate compartment within the same safe or a standalone lockable container. This is one of the most common gaps buyers miss — read through Australia's firearms storage laws before you finalise a model, because the ammunition rule affects which cabinet size actually works for you.
6. Verify steel gauge and locking points
Body steel gauge matters more than raw litres. Look for at least 3mm door steel and multiple locking bolts on Category A/B-rated cabinets — thinner steel and a single locking point are the first thing an inspector flags, even if the rack capacity is correct.
7. Confirm floor loading and anchoring
Safes over roughly 150kg need masonry anchor bolts into a concrete slab, not just floor contact. Check the base has pre-drilled anchor points before delivery — retrofitting holes into hardened safe steel on site is a real hassle.
Common mistake: placing a heavy safe on suspended timber flooring without checking the joist rating first.
8. Confirm sign-off requirements with your state
Some renewal processes ask for photos or an inspection of the storage setup. Confirm what your state firearms registry actually requires before the safe is bolted in place, so you're not unbolting it later to satisfy a form.
Troubleshooting
- Rifles won't stand fully upright — the cabinet's internal height is too short for stock-to-muzzle length. Re-measure your longest firearm and move up a size.
- Barrels touch or bend against the rack behind them — the model uses an open bar rack instead of individual slots. Choose a cabinet with separated rifle channels.
- Ammunition sits in the same compartment as firearms — this fails inspection in most states. Add a lockable ammo box or pick a safe with a built-in separate compartment.
- The safe isn't anchored to the floor — heavy freestanding units without bolts fail compliance checks even when capacity is correct. Bolt through the pre-drilled base into a concrete slab.
- The rack filled up within a year of purchase — the original count didn't include growth. Next purchase, size 2-3 slots above your current headcount.
- A "10-rifle" model doesn't actually fit 10 rifles — marketed rifle counts vary by manufacturer measuring method. Check the internal centimetre dimensions on the spec sheet, not just the labelled capacity.
"If a rifle barrel touches the rack behind it, the safe is too small — buy one size up."
“If a rifle barrel touches the rack behind it, the safe is too small — buy one size up.”
Tools and resources
- A model built around Category A through H compliance, such as the Secuguard GS3K, covers most rifle-heavy collections without upgrading again in 2027
- A dedicated handgun and ammunition cabinet, like the Guardall T25-46 handgun and ammo safe, solves the separate-ammunition requirement in one purchase rather than two
- Ammunition kept outside the main firearm compartment still needs to be genuinely secured — shooters who store surplus rounds outside the safe often rely on secure ammo storage tins for garden sheds and outbuildings, which work as a supplementary lockable option rather than a replacement for the licensed cabinet
- A tape measure and your current licence document, kept on hand when comparing spec sheets
- Masonry anchor bolts rated for the safe's listed weight
What to do next
Once the safe is sized and delivered, the next job is getting it bolted to the floor correctly — an unanchored safe is one of the most common reasons a storage setup fails inspection in 2026, even when the rack capacity and steel gauge are both correct.
FAQ
What size gun safe do I need for 5 rifles?
A 5-rifle household needs a minimum 5-slot rack, but buying a 6 to 8 slot model gives room for growth without a second purchase within a year. Check internal height against your longest rifle's stock-to-muzzle length before buying.
Do I need a separate safe for ammunition in Australia?
Most state licence conditions require ammunition locked away from the firearm itself, either in a separate safe compartment or a standalone lockable container. Check your specific state's firearms registry conditions, since requirements vary.
What steel gauge is required for a Category A/B gun safe?
Look for at least 3mm door steel with multiple locking bolts for Category A/B compliance. Thinner steel and single-point locks are commonly flagged during police storage inspections.
Do gun safes need to be bolted down?
Safes over roughly 150kg should be anchored to a concrete floor with masonry bolts rather than left freestanding. Confirm the base has pre-drilled anchor points before delivery.
Can I store handguns and rifles in the same safe?
Yes, but handguns need individually lockable trays or a dedicated compartment separate from the open rifle rack. A shared open shelf for both firearm types does not meet most storage conditions.
What happens if my gun safe is too small during a police inspection?
An undersized safe that forces rifles to lean, touch or bend against the rack is commonly flagged as non-compliant on the spot. Upgrading before renewal avoids a failed inspection and a scramble to fix it.
Is a gun cabinet the same as a gun safe for licensing purposes?
No, cabinets and safes carry different steel ratings and locking mechanisms, and licence conditions specify which is acceptable for each category. Confirm the exact requirement for your licence category before buying either.
How many rifles fit in a 10-rifle gun safe?
Marketed rifle counts vary by how each manufacturer measures rack space, so a 10-rifle model from one brand may hold fewer full-length rifles than another. Check the internal centimetre dimensions on the spec sheet rather than relying on the labelled count alone.
One last thing
The detail buyers skip most often isn't rack capacity — it's the ammunition rule. A perfectly sized 10-rifle cabinet still fails an inspection in 2026 if rounds are stored in the same compartment as the firearms, so confirm the ammunition separation requirement before you lock in a model, not after delivery.