If you are shopping for rifle-rated body armour in the UK, you have probably seen plates and panels described as RF1, RF2 or RF3. These labels come from the latest United States ballistic standard, NIJ Standard 0101.07, published by the National Institute of Justice. Understanding what each rating covers helps you choose protection that matches the threat you are actually planning for, rather than paying for capability you do not need or, worse, under-specifying.
This guide explains the RF1, RF2 and RF3 ratings in plain English, shows how they relate to the older NIJ levels you may already know, and offers practical buying advice for UK customers. All protection figures referenced here are manufacturer-stated, not independently verified by R Supply Store.
A quick refresher on NIJ armour ratings
The National Institute of Justice sets the most widely referenced body armour standard in the world. Armour is broadly split into two families.
- Soft armour is flexible and designed to stop handgun ammunition. Under the older naming, this covers Level IIA, II and IIIA. NIJ IIIA is the top soft armour tier and is rated against common handgun rounds.
- Hard armour uses rigid plates and is designed to stop rifle ammunition. Under the older naming this is Level III, III+ and IV.
NIJ 0101.07 keeps the handgun side broadly familiar but renames and restructures the rifle side. Instead of III, III+ and IV, the rifle ratings are now expressed as RF1, RF2 and RF3, where RF stands for Rifle.
What RF1, RF2 and RF3 actually mean
The three rifle ratings represent increasing levels of rifle threat protection. Here is the practical breakdown.
RF1
RF1 is the entry rifle rating. It is broadly comparable to the older NIJ Level III and is tested against common military and civilian rifle rounds, including 7.62x51mm NATO and 5.56x45mm. RF1 plates are a sensible choice if your main concern is general rifle protection and you want a plate that is lighter and easier to wear for longer periods.
RF2
RF2 builds on RF1. It is tested against the same threats as RF1 and adds protection against an additional, more demanding rifle round, namely 7.62x39mm mild steel core, a round that gave some older plates difficulty. RF2 is a strong middle option for users who want broader rifle coverage without stepping up to the heaviest plates.
RF3
RF3 is the highest rifle rating in the standard and is broadly comparable to the older NIJ Level IV. It is tested against armour-piercing rifle ammunition, specifically the .30 calibre M2 AP round. RF3 plates typically use harder, denser materials and tend to be heavier, but they offer the broadest threat coverage of the three.
How the new ratings compare to the old NIJ levels
If you are used to the older labels, this comparison should help. Remember these are general equivalences, not exact one to one mappings, because the test methods changed between standards.
- RF1 sits broadly where the older Level III did, covering common rifle rounds.
- RF2 has no direct old-standard twin. It is roughly Level III with extra coverage, sometimes informally called III+, plus a defined steel core round.
- RF3 sits broadly where the older Level IV did, covering a single armour-piercing round.
One important point. A higher number is not always strictly better for your needs. RF3 is tested against an armour-piercing round but, depending on the specific plate, may be certified against fewer total threats than an RF2 plate. Always read the manufacturer's stated threat list for the exact plate you are considering.
Choosing the right rifle plate for you
When selecting a plate, weigh up several factors rather than chasing the highest number.
- Threat profile. Match the rating to the rounds you realistically need to defend against.
- Weight and comfort. RF1 plates are usually lighter, which matters a great deal over a long day. RF3 plates tend to be heavier.
- Material. Polyethylene plates are light but bulkier and have temperature considerations. Ceramic composite plates are thinner and harder but can be heavier and more sensitive to impact damage.
- Multi-hit capability. Check the manufacturer's stated multi-hit performance, not just the single-shot rating.
- Carrier fit. Your plate is only as effective as the carrier holding it in place.
Browse our rifle-rated hard armour to see plates across the RF1 to RF3 range, and pair them with a suitable carrier from our ballistic vests and carriers collection. If you are still deciding between soft and hard protection, our wider body armour panels and plates range covers both handgun-rated and rifle-rated options.
A note on UK ownership and use
In the UK, civilian ownership of body armour is legal, and there is no licence requirement to buy or possess it. Responsibility sits with the wearer to use it lawfully. If you are buying for a professional role, check any role-specific requirements with your employer or relevant body. Always confirm that the specific product meets your operational needs before relying on it.
Frequently asked questions
Is RF3 the same as the old NIJ Level IV?
RF3 is broadly comparable to the older NIJ Level IV, as both are tested against a .30 calibre armour-piercing rifle round. The test procedures under NIJ 0101.07 changed, so treat it as a close equivalent rather than an identical rating. Protection is manufacturer-stated and not independently verified by R Supply Store.
Do I need rifle plates or is soft armour enough?
Soft armour, rated up to NIJ IIIA, is designed to stop handgun rounds and will not reliably stop rifle ammunition. If your threat profile includes rifle rounds, you need hard armour rated RF1, RF2 or RF3. Many users wear soft armour for everyday cover and add hard plates when a rifle threat is expected.
Which rifle rating should a first-time buyer choose?
For most first-time buyers wanting general rifle protection, RF1 offers a sensible balance of coverage and wearable weight. Step up to RF2 for broader round coverage, or RF3 if defence against armour-piercing rounds is a specific requirement. Always check the plate's manufacturer-stated threat list.
Does a higher RF number always mean more protection?
Not necessarily. A higher number generally means a more demanding test round, but it does not always mean the plate stops a wider range of threats. An RF2 plate may list more total defeated rounds than a given RF3 plate. Compare the full manufacturer-stated threat list for each plate rather than relying on the number alone.