Your Satisfaction, Our Priority: At Four Brothers Inc., customer satisfaction is at...
🔧 Don't forget Thread Locker — $1.50
Keep your holster hardware secure against vibration and loosening
✓ Added to your order!
$0.00 USD
FOUR BROTHERS HOLSTERS
Couldn't load pickup availability
Designed specifically for the SIG Sauer P320-XTEN 10MM equipped with a compatible Streamlight TLR-1 series weapon light, this Inside Waistband (IWB) Holster delivers a secure, light-specific fit in a streamlined design built for concealed carry.
Precision-molded from durable .093" thermoplastic, each holster combines adjustable light-based retention, an optics-ready profile, and concealment-focused features for dependable everyday use.
Compatible Firearm:
IMPORTANT: This holster does NOT fit the SIG Sauer P320-XTEN-COMP.
Compatible Streamlight Weapon Lights:
NOT Compatible with TLR-1 HL-X or HP-X
Important Fitment Requirement: This holster is designed around the P320 key rail insert used with compatible Streamlight TLR-1, TLR-1 HL, and TLR-1 HP lights.
Some variations in the light body between older and newer TLR-1 models can affect fit and retention. Our adjustable retention system is designed to accommodate these manufacturing tolerances across compatible generations.
Light-Based Retention: This holster retains the firearm through the mounted weapon light rather than the pistol frame. The compatible light must remain installed for proper fit and retention.
Every 4BROS holster begins with a precision-machined mold developed from a detailed CAD model of the actual firearm. This process allows for consistent shaping, proper clearance, and reliable retention around the designated firearm and light combination.
Our holsters are vacuum-formed, trimmed, folded, and hand-finished in-house, with each one individually checked using the actual pistol and mounted light to verify fit, retention, and draw performance.
The adjustable retention system allows you to customize draw resistance to your preference while accommodating minor dimensional differences between compatible TLR-1 light models.
Optics Compatibility Note: The listed optics have been accounted for in this holster design. Other red dot sights have not been tested and may interfere with the holster. Please contact us to verify clearance before ordering.
Choose from available belt attachments, including the Discreet Carry Concepts (DCC) Monoblock and UltiClip UltiTuck, to configure your holster around your preferred carry style.
Not sure which attachment is right for you? Explore our IWB Belt Attachment Guide for an explanation of the available options.
Start with a dependable carry belt.
Add comfort and improve concealment.
Keep an extra magazine within reach.
Explore additional P320-XTEN configurations.
Make it your own.
After adjusting your holster to your preferred setup, we recommend applying a removable thread locker to all mounting screws to help prevent hardware from loosening during regular use.
Watch our Apply Thread Locker to Your Holster video for a quick application guide.
Removing the Optional ModWing?
If you choose to remove the ModWing after purchase, you'll need our Replacement Hardware Kit, which includes: (2) 3/8" screws, (2) 1/4" rubber spacers, & (2) 1/4" threaded posts.
No. This holster is NOT compatible with the P320-XTEN-COMP. It is designed specifically for the standard SIG Sauer P320-XTEN 10MM.
This holster is designed for the Streamlight TLR-1, TLR-1 HL, and TLR-1 HP. It does not fit the TLR-1 HL-X or TLR-1 HP-X mounted with the P320 key rail insert.
No. Retention is based on the mounted weapon light rather than the firearm frame. The compatible light must remain installed for proper fit and retention.
This holster is designed around the P320 key rail insert used with compatible TLR-1, TLR-1 HL, and TLR-1 HP lights.
Yes. Right- and left-handed configurations are available.
Yes. The adjustable retention system is designed to accommodate manufacturing variations between older and newer compatible TLR-1, TLR-1 HL, and TLR-1 HP lights.
The holster profile is designed to accommodate the Trijicon SRO, Holosun 508, Holosun 509, and SIG Sauer Romeo1. Other optics have not been tested and may interfere with the holster.
Yes. Adjustable retention hardware allows you to customize draw resistance to your preference.
The ModWing uses pressure from your belt to help rotate the firearm grip closer to your body, reducing printing during concealed carry. Two interchangeable inserts are included to fine-tune the amount of leverage.
Every 4BROS holster is precision-formed and hand-finished in the USA using durable .093" thermoplastic.
Contact 4BROS for assistance confirming compatibility before ordering.
• Full Sweat Guard
• Adjustable Retention
• Adjustable Cant
• Profile cut to allow red dot sights
• Open Muzzle for threaded barrels and compensators
• Minimal material and smooth edges
• Made from .093" thermoplastic for durability.
• Optional Modwing includes 2 inserts to allow the user to adjust the amount of leverage placed against the inside of the belt to reduce firearm printing
• Proudly Made in the USA
Made in America. Founded, located, engineered, manufactured, and shipped from Northern Indiana.
Please review our Four Brothers Holsters Exchange, Return and Refund Policy
Please review our Four Brothers Holsters Terms of Service
This is the second 4Brothers holster I have owned. It's a quality holster that I would absolutely recommend to anyone. Fast shipping, and the holster was ready to go right out of the box. After it gets broken in, I will retension everything, add a bit of loctite, and I expect this holster will last for years with little to no signs of wear just like my other one.
Hopefully it wears in and functions a bit better, drawing is super sticky, reholstering without both hands is nearly impossible due to how hard it is to seat the gun into the holster. The top of the slide of my brand new gun shows massive wear from drawing the holster less than 10x. This is the only holster I have and at $100 after shipping and options, I'm a little disappointed I have to "wear it in" period. If I die because of this holster I won't be very thrilled. The holster fits the gun/accessories very well once you actually get it in, but it is not a smooth trip for the gun through the holster to it's retention point. I'm hoping aliengear makes a holster soon offering the same accessories. Cuz this ain't it. Waste of $100
This was exactly what I needed and it fits perfectly! Thank you guys! Now I’m looking at the chest rig for it!
Fits nicely
It's ok. When you take off the light it doesn't fit secure. It made cheaper than my other one the is appendix
I love this holster! More importantly, I realized two days after ordering that I forgot to include the light option. I reached out to customer service, and they got back to me right away to help fix the order.
Thank you for the great service!
Product is great, fit is perfect!
great holster. good retention and adjustability
