The best SIG P320 holster for most carriers is the Rounded Gear Sig Sauer P320 Compact IWB Holster, from $44.95. It is our best selling P320 holster, it is Claw Compatible and optic cut, and the same Kydex shell is rated for the P320 Compact, Nitron Compact, XCompact, XCarry, M18 and RXP. If you carry a full size slide such as the M17, choose the Sig Sauer P320 Full Size IWB Holster, also from $44.95.
The Quick List
- Best Overall: Sig Sauer P320 Compact IWB Holster, from $44.95
- Best for Full Size and M17: Sig Sauer P320 Full Size IWB Holster, from $44.95
- Best for Dress Clothes: Sig Sauer P320 Compact Tuckable IWB Holster, from $49.95
- Best Premium Build: Sig Sauer P320 Compact IWB KYDEX Holster, Plus Line, from $64.95
- Best for Appendix Carry: Sig Sauer P320 Sidecar Holster, from $94.95
- Best OWB Quick On and Off: Sig Sauer P320 Compact Paddle Holster, from $49.95
- Best Belt Loop OWB: Sig Sauer P320 Compact OWB Holster, from $59.95
- Best for Competition: Sig Sauer P320 XFIVE LEGION Competition Holster, from $99.95
- Best for a Weapon Light: Sig Sauer P320 Compact Olight PLX IWB Holster, from $49.95
- Best Minimalist: Sig Sauer P320 Trigger Guard Holster, from $36.95
- Best for Gym and Beltless: Sig Sauer P320 Athletic Wear Holster, from $57.95
SIG P320 Specs That Affect Holster Choice
These are SIG Sauer's published figures for five common P320 models. For a Kydex holster the rows that matter are barrel length and overall length, because the shell wraps the slide and trigger guard. The grip module sits outside the holster, which is why one P320 holster can cover models with different grips.
| Spec | P320 Nitron Compact | P320-M18 | P320-XCompact | P320 Nitron Full-Size | P320-M17 |
|---|---|---|---|---|---|
| Barrel Length | 3.9 in | 3.9 in | 3.6 in | 4.7 in | 4.7 in |
| Overall Length | 7.2 in | 7.2 in | 7.0 in | 8.0 in | Varies by SKU on SIG's page |
| Height | 5.3 in | 5.5 in | 5.3 in | 5.5 in | 5.5 in |
| Weight | 25.8 oz | 28.1 oz | 25.3 oz | 29.5 oz | 29.6 oz |
| Optic Ready Slide | No | Yes | Yes | No | Yes |
| Our Holster Shell | Compact | Compact | Compact | Full Size | Full Size |
SIG lists width by SKU, and it changes with the sights fitted, from 1.3 to 1.6 inches on the Compact. A P320 is a larger carry gun than a micro-compact, so a stiff gun belt and a concealment claw do more work here than on a smaller gun.
Which P320 Holster Do I Need? Every Size Compared
Rounded Gear makes two main P320 shells, Compact and Full Size, and the model list for each comes straight from our fitment data. Find your model below, then pick the carry style.
| Holster Shell | P320 Models Listed in Our Fitment Data | Products |
|---|---|---|
| Compact | Sig Sauer P320 Compact, P320 Nitron Compact, P320 XCompact, P320 XCarry, P320 M18, P320 RXP | IWB, Tuckable IWB, Plus Line IWB, Sidecar, Paddle, OWB, Athletic Wear |
| Full Size | Sig Sauer P320 Full Size, P320 M17, P320 Max, P320 AXG Pro, P320 XFive, P320 X-VTAC, P320 RXP Full Size | IWB, Tuckable IWB, Plus Line IWB, Paddle, OWB, Athletic Wear, XFIVE LEGION IWB, XFIVE LEGION Paddle, XFIVE OWB |
| Competition | Sig Sauer P320 XFive Legion | XFIVE LEGION Competition Holster |
| Trigger Guard | Sig Sauer P320 (listed without a size, since it covers only the trigger guard) | Trigger Guard Holster |
| Olight PL X Light | Sig Sauer P320 Compact with Olight PL X; Sig Sauer P320 Full Size with Olight PL X | Compact and Full Size PLX IWB and Paddle |
The M17 and M18 take different holsters. Our fitment data puts the P320 M18 on the Compact shell and the P320 M17 on the Full Size shell. Our XFIVE LEGION IWB, XFIVE LEGION Paddle and XFIVE OWB holsters list the same seven models as the Full Size shell.
What we do not list: we do not currently list a holster for the P320 Subcompact, the original P320 Carry, the P320 XFull, the P320 XTEN, the P320 Spectre Comp or the P320 AXG Scorpion.
Every Carry Configuration, Compared
Sig Sauer P320 Compact IWB Holster, from $44.95
Best Overall
Our best selling P320 holster. Adjustable cant, adjustable Posi-Click® retention with an audible click when the gun seats, full trigger guard coverage and a full length sweat guard. It is Claw Compatible, so you can add the Holster Claw Kit ($15.95) for appendix carry. One shell covers the P320 Compact, Nitron Compact, XCompact, XCarry, M18 and RXP, and it is optic cut.
Best for: strong side or appendix daily carry of a compact slide P320.
Sig Sauer P320 Full Size IWB Holster, from $44.95
Best for Full Size and M17
The same IWB design on the longer shell. Rated for the P320 Full Size, M17, Max, AXG Pro, XFive, X-VTAC and RXP Full Size. A 4.7 inch barrel carries best at 3 to 4 o'clock, where the extra length sits along the hip. Optic cut.
Best for: full size P320 and M17 owners who carry inside the waistband.
Sig Sauer P320 Compact Tuckable IWB Holster, from $49.95
Best for Dress Clothes
The belt loop leaves a gap so a shirt tucks between the holster and your belt, with adjustable cant and ride height. Same Compact shell model list as the IWB. A Full Size Tuckable IWB Holster is also $49.95.
Best for: office carry, tucked button-downs, uniforms.
Sig Sauer P320 Compact IWB KYDEX Holster, Plus Line, from $64.95
Best Premium Build
Our step up IWB. It comes with the claw already included and a spring steel Monoblock metal belt clip with a Cerakote finish. The Full Size Plus Line is also $64.95 and covers the Full Size shell models.
Best for: appendix carry, all day wear, carriers who want the claw out of the box.
Sig Sauer P320 Sidecar Holster, from $94.95
Best for Appendix Carry
Holster and spare magazine in one tuckable appendix rig, with a claw included. The magazine pouch helps tip the grip into your body. Rated for the Compact shell models: P320 Compact, Nitron Compact, XCompact, XCarry, M18 and RXP. We do not make a Full Size P320 sidecar.
Best for: appendix carriers who want a reload on board without a second clip on the belt.
Sig Sauer P320 Compact Paddle Holster, from $49.95
Best OWB Quick On and Off
The paddle slips inside the waistband and holds without threading a belt, so it goes on and off in seconds. The Full Size Paddle Holster and XFIVE LEGION Paddle Holster are each $49.95.
Best for: range days, training, open carry, keeping the gun on you at home.
Sig Sauer P320 Compact OWB Holster, from $59.95
Best Belt Loop OWB
Belt loops hold the holster tighter to your body and steadier than a paddle, which matters if you carry OWB under a jacket all day. The Full Size OWB Holster and XFIVE OWB Holster are each $59.95. Optic cut.
Best for: all day OWB carry, cold weather carry under a cover garment.
Sig Sauer P320 XFIVE LEGION Competition Holster, from $99.95
Best for Competition
Built for sport shooting. A deep competition cut spine for optics and a fast draw, thumb screw retention that locks with half a twist, .125 inch Kydex, and a push button mount for 1.5 to 1.75 inch belts. Rated for the P320 XFive Legion.
Best for: USPSA and other action shooting with an XFive Legion.
Sig Sauer P320 Compact Olight PLX IWB Holster, from $49.95
Best for a Weapon Light
A light changes the shape of the gun, so it needs its own shell. This one is molded for a P320 Compact with an Olight PL X mounted, and it is Claw Compatible. For a full size slide, use the Full Size Olight PLX IWB Holster ($49.95). Paddle versions for the Compact and Full Size are $54.95.
Best for: carriers running an Olight PL X on a P320.
Sig Sauer P320 Trigger Guard Holster, from $36.95
Best Minimalist
The smallest holster you can carry that still covers the trigger. Add the Pocket and Purse Trigger Guard Holster Kit ($9.95) to carry it in a bag. Our fitment data lists it for the Sig Sauer P320 without naming a size.
Best for: bag carry, a nightstand gun, deep concealment.
Sig Sauer P320 Athletic Wear Holster, from $57.95
Best for Gym and Beltless
Built for gym shorts, joggers and other waistbands with no belt. Rated for the Compact shell models. The Full Size Athletic Wear Holster is also $57.95.
Best for: workouts, walking the dog, lounge clothes.
What Actually Matters When Buying
- The right shell for your slide. Match your model to the Compact or Full Size list above. The grip module does not change the holster.
- Full trigger guard coverage. Non-negotiable on any striker-fired carry gun. Every holster in this guide covers the trigger guard.
- Adjustable retention. You should be able to set how hard the gun clicks in and how much pull it takes to draw.
- Cant and ride height. What works at 4 o'clock does not work at 1 o'clock. Adjustable cant lets one holster follow you as your carry position changes.
- A real gun belt. A 26 to 30 ounce gun sags on a dress belt. The Ultimate Concealed Carry Leather Gun Belt ($69.99) is 1.5 inches and 14 oz leather.
IWB vs OWB for the SIG P320
| Factor | IWB | OWB |
|---|---|---|
| Concealment | Very good with a Compact slide and a claw. | Fair. Needs an untucked shirt or jacket. |
| Comfort | Good with a stiff belt at 25 to 30 oz. | Excellent. Nothing inside the waistband. |
| Draw Speed | Good, once you practice clearing the garment. | Faster. |
| Wardrobe Impact | Moderate. Many carriers size up their pants. | None. |
| Best For | Daily carry, especially Compact slide models. | Range, training, competition, open carry, winter carry. |
Appendix Carry Setup
- Start with a Compact slide. The 3.9 inch Compact shell carries more comfortably at appendix than a 4.7 inch Full Size slide.
- Fix the grip print. Use a Claw Compatible holster with the Holster Claw Kit, the Plus Line with its claw included, or the sidecar.
- Use a stiff belt. Appendix carry puts all the weight forward. A 1.5 inch gun belt keeps the holster from tipping.
- Check it seated. Sit in your car and at a desk before you commit to a ride height. Most adjustment problems only show up sitting down.
Optics and Lights
Every Kydex holster we build for the SIG P320 is optic cut, so an optic-equipped P320 needs no different shell and no separate decision at checkout. Choose the Compact or Full Size shell by your model, not by whether it wears a red dot.
A weapon light is the one real variant. A mounted light changes the outline of the gun, so it needs a light-bearing shell. Our current P320 light-bearing holsters are for the Olight PL X, in Compact and Full Size. We do not currently list a P320 holster for a Streamlight TLR-1 or TLR-7.
Frequently Asked Questions
What Is the Best Shoulder Holster for a Sig P320?
Our universal Vice Shoulder Holster ($27.95), backed by a 1-year guarantee, takes compact size P320s without a light or laser: the P320 Compact, Nitron Compact, XCompact, XCarry, M18 and RXP. It is not sized for the full size P320, M17 or our other full size models; for those, choose our Sig Sauer P320 Full Size OWB Holster ($59.95).
Which P320 Sizes Share a Holster?
Our Compact shell is rated for the Sig Sauer P320 Compact, P320 Nitron Compact, P320 XCompact, P320 XCarry, P320 M18 and P320 RXP. Our Full Size shell is rated for the P320 Full Size, P320 M17, P320 Max, P320 AXG Pro, P320 XFive, P320 X-VTAC and P320 RXP Full Size. Both shells are optic cut.
Will an M17 or M18 Use a P320 Holster?
Yes, but not the same one. Our fitment data puts the P320 M18 on the Compact shell, with the P320 Compact, Nitron Compact, XCompact, XCarry and RXP, and the P320 M17 on the Full Size shell, with the P320 Full Size, Max, AXG Pro, XFive, X-VTAC and RXP Full Size. Choose the shell that matches your model.
Does the P320 X-Series Take the Same Holster?
It depends on the model. The P320 XCompact and XCarry use our Compact shell, and the P320 XFive and X-VTAC use our Full Size shell. The P320 XFive Legion has its own XFIVE LEGION Competition Holster. We do not currently list a holster for the P320 XFull or XTEN.
Do You Make a P320 Subcompact Holster?
No, we do not currently list a holster for the P320 Subcompact. The smallest P320 shell we make is our Compact shell, rated for the Sig Sauer P320 Compact, P320 Nitron Compact, P320 XCompact, P320 XCarry, P320 M18 and P320 RXP. Every holster we build on it is optic cut.
How We Chose
These are our own holsters, so we say that plainly. We ranked them by what SIG P320 owners actually buy from us, checked every pick against our live catalog and our fitment data, and left out anything we no longer sell. Gun specs come from SIG Sauer's published figures. Every Kydex holster here is molded in Jacksonville, Florida and backed by our lifetime guarantee.
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Shop SIG P320 Holsters
See every holster we make for the P320 in Sig P320 Holsters, or shop by model in Sig Sauer P320 Compact KYDEX Holsters, Sig Sauer P320-M18 KYDEX Holsters and Sig Sauer P320 M17 KYDEX Holsters.
