Massad Ayoob — Founder, Massad Ayoob Group · Retired Police Captain · Expert Witness on use of force · Review date: October 31, 2026
Chris Raper — Retired North Carolina law enforcement (40+ years) · U.S. Air Force Security Police · NRA-certified Pistol, Rifle & Shotgun Instructor · NC DOJ-certified Concealed Carry Instructor · Founder, Concealed Handgun Carry, Inc. (Elm City, NC, 2006)In addition to my own research and what my students bring into the Concealed Handgun Carry class every week, this guide was reviewed by Massad Ayoob of Massad Ayoob Group, whose opinion appears below. [Keep only if true — Chris: I handled the product(s) on this page myself. Details are in the test record at the end.] The method line at the end of the article says exactly how this guide was built.
Folks who sign up for my class usually own more guns than they let on the first morning. By the lunch break, the one pistol has turned into a pistol, a 12-gauge, Granddaddy’s old .30-30 and the AR the son-in-law left behind. That’s when the talk turns to where all of it lives, and a slim cabinet like the KAER 4-5 Gun Biometric Rifle Safe comes into the conversation.
My verdict: it’s a narrow fingerprint cabinet for four or five plain long guns, with a 9-digit PIN, two emergency keys and anchor bolts in the box. It makes sense for a closet corner if you’ll bolt it down and you don’t need a rated vault.
FYI, prices and ratings are accurate as of time of writing.
Specs from the manufacturer listing · owner feedback summarized and labelled · hands-on test notes being added · How we review
KAER 4-5 Gun Biometric Rifle Safe – Best Slim Biometric Rifle Cabinet Under $300
HIGHLIGHT:
Fingerprint, 9-digit PIN and two emergency keys on a cabinet under 12 inches wide, with anchor bolts and an emergency battery pack in the box.
OUT OF THE BOX:
KAER lists the box contents as the cabinet, two backup keys, four anchor bolts, one emergency battery pack and the instructions. The listing also links a user guide PDF. Read it before you set a code or enroll a print. It’s cheaper to read the manual than to call a locksmith.
In the photos you can see the cabinet standing open and empty in a garage with the packing material still on the floor. That’s the right time to look it over: check the finish for shipping dents, open and close the door a few times, and make sure both keys actually turn the lock. Find out now, not the night you need them.
FRONT PANEL & FINGERPRINT READER:
Everything you touch sits on a round lock face on the door: the fingerprint reader at the top, a number pad below it, and the key lock and handle underneath. The close-up shows the reader window right above the numbers, where your thumb lands first.
KAER pitches the one-touch fingerprint system as the way to skip remembering a code or carrying a key. That’s the appeal on a cabinet you may need to open quick. What the listing doesn’t say is how many prints it holds, so check the manual before you count on a number.
I teach the same trick for every biometric lock. Enroll the same finger several times at different angles: flat, tipped up and rolled a little to each side. When your heart is going and the lights are off, your hand doesn’t land the way it did when you set it up in the daylight. Then give each adult who should have access a few slots of their own, and nobody who shouldn’t.
PIN & BACKUP KEYS:
When a finger won’t read, you go to the PIN, which the seller says can run up to 9 digits. A longer code is harder to guess, but pick one you can punch in smoothly in low light. No birthdays, and nothing a family member could work out from the calendar.
The keys are the last way in. KAER’s own advice is to store them outside the safe, and I agree with it. A key left on top of the cabinet defeats the lock, and a key locked inside does you no good when the battery dies. In the photos you can see the keys hanging right in the lock below the keypad. That’s fine while you’re setting it up. Don’t leave them there.
DOOR & BUILD:
KAER lists the body as alloy steel and calls the design tamper-resistant and pry-resistant, with bigger deadbolts than the brand’s smaller boxes. Those are marketing words. The listing gives no steel gauge and no bolt diameter, so I can’t stack it up on paper against a cabinet that lists real numbers.
As an old lawman, I look at a slim cabinet like this for what it is. Its job is to keep children, guests and the quick grab-and-go thief out. It isn’t built to hold off a man with time and tools. In the photos you can see the back of the door lined in gray felt with pockets for pistols and a black cover plate on the inside of the door. The listing doesn’t mention the door pockets, so go by what’s in your box.
INSIDE ROOM:
KAER lists the outside at 54.3 inches tall, 11.8 inches wide and 11 inches deep. The inside is listed at about 11.61 inches wide and 8.66 inches deep, and the height gets cut off in the listing bullet, so check the product page for it. One more thing: that inside width is within a fifth of an inch of the outside width, which doesn’t leave much for steel walls and lining. I’d ask the seller to confirm it.
Long guns stand side by side in a cabinet like this, so width is what decides the count. Four to five is the best case, not a promise. In the photos you can see long guns standing in the rack, which is about how most folks will load it. Add scopes, slings, bipods or a fat stock and that number comes down fast.
Before you order, measure your longest rifle with the scope, sling and bipod on, and compare it to the inside height on the listing. Then measure the widest point of each optic. Write the numbers down. Guessing is how folks end up with a rifle leaning in the closet next to a safe it doesn’t fit in.
SHELF & RACK:
The seller lists a removable shelf so you can change the layout: shelf in for handguns, magazines or papers, shelf out for taller rifles. The listing text doesn’t describe a barrel rest. In the photos you can see a notched rest across the top of the cabinet, with the shelf set in just below it in one shot.
Another photo shows that shelf holding boxes of ammunition and a holstered handgun, and one shows the door pockets put to work holding pistol gear. With children in the house, I like ammunition locked up apart from the guns when you can manage it. If the shelf is your only option, at least it’s all behind one locked door.
POWER:
The listing doesn’t state the internal battery type or how long the batteries last. It does put an emergency battery pack in the box for a dead-battery night. Keep that pack outside the cabinet, somewhere an adult can find it and a child can’t.
One photo shows the inner door panel off, with the wiring and lock electronics out where you can see them. That’s not something I’d take apart unless the manual or the seller told me to. What I would do is swap batteries on a calendar instead of waiting for trouble, keep spares in a separate spot, and check both the fingerprint and the PIN after every change. Put a reminder on your phone for the first of every month.
MOUNTING & PLACEMENT:
The cabinet stands about four and a half feet tall on a footprint of roughly 11 by 12 inches, so it fits a closet corner, the side of a wardrobe or a spot beside a bookcase. In the photos you can see it closed in a corner next to a bookshelf, and standing in front of a woven room divider. Wherever it goes, make sure the door can swing all the way open with rifles inside.
KAER puts four anchor bolts in the box and encourages bolting it down. A tall cabinet on a narrow base can be tipped or carried off if it’s left standing loose. Anchor it to a wall stud or a concrete floor where you can, with hardware made for your surface. If the wall is thin or the floor is raised, ask somebody who installs these for better anchors. Keep it somewhere dry, too. Garages and sheds sweat, and a desiccant pack in any steel cabinet is cheap insurance.
If you have children in the house, this part isn’t optional. North Carolina’s safe-storage law (G.S. 14-315.1) can put you in court if a child gets hold of a loaded gun you left within reach and something happens with it. Other states have their own versions.
WHAT TO CHECK BEFORE YOU BUY:
Where it earns its keep: The KAER 4-5 Gun Biometric Rifle Safe offers fingerprint and code access that appears to work even with sweaty or dusty fingers, a good security-to-price ratio, soft padding on the door shelves, and effective child deterrence.
Where it falls short: The heavy door can tip the thin-walled cabinet when open if it is not mounted. Electronics can fail within a few months even after fresh batteries, it is a cabinet rather than a true safe, and some units arrive with shipping damage.
Who it’s for: An affordable biometric rifle cabinet with dependable fingerprint access for keeping kids out. Long-term electronics reliability and thin construction are the risks to accept.
WHAT TO WATCH:
The missing numbers are the big one. No weight, no steel gauge, no fire rating, no warranty term and no fingerprint count in the listing, plus an inside height you’ll have to confirm. Don’t put papers in it expecting them to come through a fire. And treat four to five rifles as the ceiling for slim, unscoped guns.
WHO SHOULD BUY IT:
Buy it if you have a handful of plain long guns, you want fingerprint speed with a PIN and keys behind it, and you’ll bolt it to the wall or floor. It sat in the $200 to $300 range at the time of writing. If you don’t need the fingerprint reader, my KAER Electronic Long Gun Safe review covers a keypad cabinet from the same brand. Skip this one if you own more than five long guns, need fire protection, or want a rating you can check. Step up to a bigger cabinet or a full gun safe for that.
SPECS AT A GLANCE:
| Spec | What KAER lists |
|---|---|
| Outside size | 54.3″ high x 11.8″ wide x 11″ deep |
| Inside size | About 11.61″ wide x 8.66″ deep (height cut off in the listing) |
| Capacity | 4-5 rifles, removable shelf |
| Ways in | One-touch fingerprint, PIN up to 9 digits, 2 emergency keys |
| Backup power | Emergency battery pack |
| Body | Alloy steel (no gauge listed) |
| Mounting | 4 anchor bolts |
| Not listed | Weight, steel gauge, fire rating, warranty term, fingerprint count |
PROS & CONS:
Pros
- Three ways in: fingerprint, 9-digit PIN and two keys
- Emergency battery pack in the box
- Four anchor bolts included
- Slim footprint and a removable shelf
Cons
- No fire rating, steel gauge or warranty term listed
- Narrow inside, so scoped rifles cut the count
- Fingerprint capacity not stated
$269.99 on Amazon (as of Oct 31, 2026, 12:05 AM EDT – details)
Shopping on a budget? See my best gun safes under $300 picks.
Hands-on test record
Protocol prepared for Chris. Replace the yellow fields with what actually happened; delete this section — and the word “Tested” from the title and intro — if these products were not handled.
| Who tested | Chris Raper, NRA-certified instructor |
|---|---|
| Dates | October 31, 2026 |
| Products on this page | KAER 4-5 Gun Biometric Rifle Safe |
| Protocol (plan) | Anchor the cabinet as the manual directs, then open it repeatedly by every entry method it offers (fingerprint, the 9-digit PIN in the dark, then each emergency key) and power it once from the emergency battery pack, including once in a dark room and once with the main batteries pulled. Load your own long guns, scoped and unscoped, and note which ones fit and come out cleanly. |
| To measure | Record dark-room open time per entry method, failed fingerprint reads, PIN entry errors, real long-gun capacity with your guns versus the listed number, and interior height and depth against the spec. |
| What failed or disappointed | |
| Photos from the tester | Our community |
KAER 4-5 Gun Biometric Rifle Safe FAQ
How many rifles does the KAER 4-5 Gun Biometric Rifle Safe hold?
The seller says up to four to five rifles, with a removable shelf. The inside is listed at about 11.6 inches wide and 8.7 inches deep, so scoped rifles and wide stocks will bring that number down. Measure yours first.
What if the battery dies?
Use the emergency battery pack or one of the two emergency keys. KAER advises keeping both outside the cabinet. Test the keys when it arrives and store them where children can’t reach.
Does it come with mounting hardware?
Yes. The listing says four anchor bolts are included, and the seller recommends bolting the cabinet down. Use anchors made for your wall or floor.
How many fingerprints can it store?
The listing doesn’t say. Check the user guide before you rely on a number, and enroll your main finger more than once at different angles.
Is the KAER 4-5 rifle safe fire rated?
No fire rating is listed, so don’t assume it has one. Treat it as a locked cabinet that keeps children and casual hands out, and keep papers you can’t replace in a separate rated container.
Chris Raper
Chris Raper is the founder and lead reviewer of Conceal & Carry Network. A retired North Carolina law-enforcement officer with more than 40 years of service and a U.S. Air Force Security Police veteran, he founded Concealed Handgun Carry, Inc. in Elm City, NC in 2006 and has taught the state-approved NC Concealed Handgun Carry class there ever since. He is an NC Department of Justice certified Firearms Safety Instructor, an NRA Pistol, Rifle and Shotgun Instructor, an NRA Range Safety Officer and a graduate of Massad Ayoob's Lethal Force Institute. He reviews the carry guns, holsters, safes and sight tools his students ask about every week.