How to Choose the Right Holster for Your Sig Sauer P320

Quick Answer

For most Sig Sauer P320 owners, the best holster depends on your primary carry method. If you carry concealed, an IWB holster with adjustable retention and a claw or wing is a solid choice. For open carry or range use, an OWB holster offers easier access and more comfort. Consider a modular system if you want to switch between carry styles without buying multiple holsters.

Choosing the right holster for your Sig Sauer P320 is about more than just finding something that fits. The holster affects how comfortably you carry, how quickly you can draw, and how well you conceal your firearm. With so many options on the market, it helps to start with your carry style and daily routine.

This guide breaks down the key differences between IWB and OWB holsters, explains what to look for in a modular holster, and gives you concrete decision rules to narrow down your choice. We’ll also cover fit and comfort considerations, so you can carry with confidence.

Start with Your Carry Style

Your daily routine and wardrobe are the biggest factors in choosing a holster. If you carry concealed, an inside-the-waistband (IWB) holster keeps the firearm closer to your body and reduces printing. IWB holsters work well with jeans, chinos, and other pants with a sturdy waistband. They also pair with a good gun belt to prevent sagging.

If you open carry or spend time at the range, an outside-the-waistband (OWB) holster is often more comfortable for all-day wear. OWB holsters keep the firearm off your hip bone and allow a more natural draw. They are also easier to reholster, which is important for training and competition. The tradeoff is that OWB holsters are harder to conceal under a shirt.

• Consider a hybrid holster if you want the concealment of IWB with the comfort of OWB.

IWB vs. OWB: What to Know

IWB holsters are the go-to for concealed carry. They tuck the firearm inside your waistband, which helps hide it under a shirt or jacket. Look for an IWB holster with adjustable cant and retention so you can fine-tune the draw angle and how firmly the holster holds the gun. A claw or wing attachment can help push the grip toward your body, reducing printing.

OWB holsters are more comfortable for larger firearms and for people who spend long hours on their feet. They also allow a faster, more consistent draw. Many OWB holsters offer active retention, such as a thumb break or hood, which adds security. The downside is that OWB holsters require a cover garment for concealment, so they are less practical for everyday low-profile carry.

• Test the retention of any holster with an unloaded firearm before wearing it.

Modular Holsters: Flexibility Without Compromise

A modular holster system lets you switch between IWB and OWB configurations using the same shell. This is ideal if you carry concealed on weekdays and open carry on weekends, or if you want one holster for both range and daily use. Modular systems typically include a hard shell that attaches to different mounting platforms, such as a belt clip, paddle, or drop-leg platform.

When evaluating a modular holster, check how quickly you can swap configurations and whether the retention settings carry over. Some systems require tools to change the mounting platform, which may slow you down. Also, consider the overall thickness and weight, as modular holsters can be bulkier than dedicated IWB or OWB options.

• If you plan to use a modular holster for concealed carry, choose a compact mounting platform that doesn't add extra bulk.

Fit and Comfort: Getting It Right

A holster that doesn't fit your Sig Sauer P320 properly is unsafe and uncomfortable. Look for a holster that is molded specifically for the P320 model, not a universal fit. The holster should cover the trigger guard completely and hold the firearm snugly without excessive play. You should hear a positive click when the gun is seated.

Comfort is just as important. The holster should not dig into your hip or create pressure points. Consider the material: Kydex offers rigid retention and a low profile, while leather molds to your body over time but may require a break-in period. Some hybrid holsters combine a leather backing with a Kydex shell for a balance of comfort and retention.

• Wear your holster around the house for a few days to test comfort before committing to a full day of carry.

Decision Rules for Choosing a P320 Holster

• Carry Method: Decide whether you will primarily carry concealed or open. IWB for concealed, OWB for open or range use. If you carry concealed daily, start with an IWB holster.
• Retention Needs: Consider how much retention you need. Passive retention is fine for most concealed carry, while active retention (thumb break or hood) is better for open carry or duty use. For open carry, choose a holster with active retention for extra security.
• Comfort and Concealment: Test the holster for comfort and printing. A claw or wing can improve concealment, but may add bulk. Leather backs can be more comfortable but require break-in. Prioritize comfort and concealment for daily carry; prioritize draw speed for range use.
• Modularity: If you want one holster for multiple carry styles, choose a modular system that allows you to switch between IWB and OWB platforms. Modular holsters are a good investment if you change carry styles often.

Related Gear from Vertx

• Everyday Fanny Pack+: Exterior fabric offers superior water resistance and durability, all while maintaining a sleek, modern look. Micro Rapid Access Tab and Modular Holster Retention system included, making it ready for action the moment it arrives. This pack gives you a convenient way to carry your P320 without a traditional holster, and the modular holster retention system keeps your firearm secure and accessible.
• S.O.C.P. Tactical Fanny Pack: This tactical Fanny Pack is large enough to conceal your everyday carry while still maintaining its low-profile functionality. Whether you’re on duty or off, this pack is ready for whatever you have in store. If you prefer not to carry on your waistband, this pack offers a low-profile alternative that still allows quick access to your firearm.

Who Should Choose Which Holster

Best For

• IWB holsters are best for concealed carry in urban environments or under light clothing.
• OWB holsters are best for open carry, range training, or when concealment is not a priority.

Not For

• IWB holsters are not ideal for people who sit for long periods or have a larger build, as they can become uncomfortable.
• OWB holsters are not suitable for deep concealment or when you need to keep your firearm completely hidden.

Choosing the right Sig Sauer P320 holster comes down to your carry style, comfort, and retention needs. Start with a clear idea of how you'll carry, test a few options, and don't overlook the importance of a proper fit. A good holster is an investment in both safety and comfort, so take your time to find the one that works for you.