Best SIG P365 Upgrades 2026: Grip Modules, Triggers, Optics & Barrels Ranked

The SIG P365 is the best-selling concealed carry pistol in America, and its modular design makes it one of the most upgradeable. This guide ranks the best P365 upgrades across grip modules, triggers, optics, barrels, and weapon lights. Whether you carry a standard P365, P365 XL, or X-Macro, we cover what fits, what matters, and what to upgrade first.

By AB|Last reviewed February 2026

Quick Answer: Best P365 Upgrades in 2026

Best Grip Module: Wilson Combat WCP365 ($65) - Aggressive texturing, improved grip angle, drop-in swap. Best bang-for-buck upgrade.

Best Trigger: SIG X-Series Flat Trigger ($79) - Factory flat trigger from the Spectre Comp line. Drop-in with full warranty.

Best Optic: Holosun EPS Carry ($389) - Enclosed emitter on Shield RMSc footprint. Lint-proof for pocket carry.

Best Barrel: True Precision Threaded Match ($169) - Match-grade 416R stainless with 1/2x28 threading.

Upgrade priority: Grip module first (most impact per dollar), then trigger, then optic. See our pistol red dot guide for a deeper optic comparison.

P365 Upgrade Priority: What to Buy First

Not all upgrades deliver equal value. Here is the recommended upgrade order based on impact per dollar, starting with the modifications that most transform the shooting experience.

Grip Module ($65-$329)Biggest single improvement. Changes ergonomics, texture, and control. Swap takes 30 seconds.
Trigger ($79-$99)Flat trigger improves consistency and perceived reset. Drop-in installation.
Optic ($289-$549)Red dot enables faster target acquisition and better accuracy. Requires optic-ready slide.
Weapon Light ($139-$149)Essential for defensive use in low light. Requires railed P365 model.
Barrel ($169-$179)Only if running a suppressor or compensator. Factory barrel is fine for defensive accuracy.

Best P365 Grip Modules

The grip module is what makes the P365 uniquely upgradeable. Unlike Glocks where you are stuck with the frame you bought, the P365's serialized fire control unit pops out of the grip module, letting you swap grips in seconds. This is the single most impactful upgrade you can make.

Best P365 Grip Modules

The grip module is the single most impactful P365 upgrade. SIG's modular design means swapping grips takes seconds and transforms the shooting experience.

Wilson Combat WCP365 Grip Module

Best Overall - Best value grip upgrade with aggressive texturing

$65

Enhanced PolymerMultiple Colors

Pros

+Excellent value at $65
+Aggressive texturing improves control
+Improved grip angle for natural point
+Multiple color options
+Drop-in installation, no fitting

Cons

−Very aggressive texture may irritate skin
−May not fit all holsters without adjustment
−Polymer construction (not metal)

Material: Enhanced polymerTexture: Aggressive stipplingColors: Multiple options

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Icarus Precision ACE 365 Grip Module

Best Premium - Full aluminum construction for maximum recoil control

$329

Full AluminumPremium

Pros

+Full aluminum construction reduces felt recoil
+Added weight improves control during rapid fire
+Premium machining and finish quality
+Multiple finish options

Cons

−Significant price premium at $329
−Added weight may not suit all carry preferences
−Long lead times due to demand

Material: Full aluminumFinish: Multiple optionsWeight: Added for control

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Mischief Machine Alpha Grip Module P365

Best Ergonomics - Deep undercut and enhanced beaver tail

$169

Deep UndercutEnhanced Polymer

Pros

+Deep trigger guard undercut for high grip
+Aggressive stippling pattern
+Enhanced beaver tail prevents slide bite
+Good middle ground on price

Cons

−Still polymer construction
−Aggressive texture may be too much for some
−Smaller brand with less market presence

Material: Enhanced polymerFeature: Deep trigger guard undercutTexture: Aggressive stippling

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Best P365 Triggers

The factory P365 trigger works, but it is a curved design with a heavier pull. A flat trigger upgrade improves finger placement consistency and gives a cleaner break. Both options here are drop-in replacements that maintain the striker-fired safety system.

Best P365 Triggers

The P365 trigger is functional but heavy. A flat trigger upgrade improves consistency and feel without compromising the striker-fired safety system.

SIG Sauer X-Series Flat Trigger P365

Best Overall - Factory quality flat trigger with full warranty

$79

Factory SIGDrop-In

Pros

+Factory SIG quality and reliability
+Flat face for consistent finger placement
+Drop-in fitment, no gunsmithing
+Full SIG warranty maintained

Cons

−Minimal pull weight reduction
−Basic upgrade compared to aftermarket
−Not adjustable

Type: Flat faceOrigin: SIG factory (X-Macro)Install: Drop-in

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Armory Craft Flat Trigger P365

Best Aftermarket - Improved geometry with multiple finish options

$99

Improved GeometryMultiple Finishes

Pros

+Improved trigger geometry and feel
+Flat face for consistent placement
+Multiple finish options
+Good value for the upgrade

Cons

−Not adjustable like the P320 version
−Installation can be tricky for beginners
−Check fitment if running X-Macro frame

Type: Flat faceFeature: Improved geometryFinish: Multiple options

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Best P365 Optics (Shield RMSc Footprint)

The P365 XL and optic-ready P365 slides use the Shield RMSc footprint, the compact standard for slim pistol optics. If you carry a standard P365 without an optic cut, you will need to have the slide milled. For a deeper comparison of all pistol optics, see our best pistol red dot guide.

Best P365 Optics (Shield RMSc Footprint)

The P365 XL and optic-ready P365 models use the Shield RMSc footprint. These are the top compact red dots that fit without adapter plates.

Holosun EPS Carry

Best Overall - Enclosed emitter reliability for daily carry

$389

Enclosed EmitterShield RMSc

Pros

+Enclosed emitter prevents lint and debris blockage
+Fits Shield RMSc slide cuts natively
+Solar failsafe and Shake Awake
+Side-loading battery without removing optic
+Green dot option available

Cons

−Higher price than open-emitter 507K
−Single dot reticle (no multi-reticle)
−Smaller window than 507K

Reticle: 2 MOA or 6 MOAFootprint: Shield RMScWeight: 1.03 oz

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Holosun 507K X2

Best Features/Value - Multi-reticle at the lowest price

$289

Multi-ReticleShield RMSc

Pros

+Full multi-reticle system (dot, circle, or both)
+Perfect fit for P365 and P365 XL
+Solar failsafe and Shake Awake
+Side-loading battery
+Best value in the compact optic category

Cons

−Open emitter vulnerable to lint and debris
−Smaller window than full-size optics
−Buttons can be accidentally pressed

Reticle: 2 MOA / 32 MOA / BothFootprint: Shield RMScWeight: 1.0 oz

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Trijicon RMRcc

Best Durability - Forged aluminum with legendary Trijicon reliability

$549

Forged AluminumPremium

Pros

+Legendary Trijicon reliability and durability
+Forged 7075-T6 aluminum housing
+Auto-adjusting brightness
+4+ year battery life
+Clear, undistorted Trijicon glass

Cons

−Premium pricing at $549
−Top-loading battery requires optic removal
−No multi-reticle or solar backup

Reticle: 3.25 MOA or 6.5 MOAFootprint: Shield RMScWeight: 1.0 oz

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Best P365 Threaded Barrels

A threaded barrel is a purpose-driven upgrade. If you plan to run a suppressor or compensator, you need one. If not, the factory barrel delivers perfectly adequate defensive accuracy. Both options use 1/2x28 threading, the standard for 9mm muzzle devices.

Best P365 Threaded Barrels

A threaded barrel enables suppressor use and compensator mounting. Both options provide 1/2x28 threading for standard 9mm muzzle devices.

True Precision Threaded Match Barrel P365

Best Overall - Match-grade accuracy with multiple finish options

$169

Match-Grade416R Stainless

Pros

+Match-grade chamber for improved accuracy
+1/2x28 threading for suppressors and comps
+Good value compared to SIG factory
+Multiple finish options available

Cons

−Test for reliability before carrying
−Thread protector sold separately
−Holster fit affected by extended length

Material: 416R stainless steelThreading: 1/2x28Finish: Multiple options

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SIG Sauer Threaded Barrel P365

Best OEM Option - Factory fitment with full SIG warranty

$179

Factory SIGBlack Nitride

Pros

+Factory fitment guaranteed
+1/2x28 threading
+Full SIG warranty
+Reliable function out of the box

Cons

−Extends overall length
−Affects holster compatibility
−Standard factory accuracy (not match-grade)

Material: Black nitrideThreading: 1/2x28Fit: Factory drop-in

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Best P365 Weapon Lights

A weapon light is essential for any pistol used for home defense or nighttime carry. The P365's compact rail limits options, but Streamlight covers both dedicated and universal form factors.

Best P365 Weapon Lights

A weapon light is essential for a defensive pistol. These compact options are sized for the P365 rail without adding excessive bulk.

Streamlight TLR-7 Sub

Best P365-Specific - Purpose-built for micro-compact pistol rails

$149

500 LumensP365-Specific

Pros

+Designed specifically for subcompact pistol rails
+Frame-specific key inserts for P365
+500 lumens in compact form factor
+Sits flush with P365 muzzle
+Wide holster compatibility with light

Cons

−5,000 candela is adequate but not exceptional
−CR123A battery (not rechargeable)
−Limited to subcompact pistols

Lumens: 500Candela: 5,000Battery: CR123A

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Streamlight TLR-7A Flex

Best Universal - Fits P365 and larger pistols alike

$139

500 LumensUniversal Compact

Pros

+Versatile fit across multiple pistol sizes
+High/low rear switch paddle options
+500 lumens with reliable output
+Slightly cheaper than TLR-7 Sub

Cons

−Extends past P365 muzzle
−Not as flush-fitting as TLR-7 Sub
−May require holster specifically made for TLR-7A

Lumens: 500Candela: 5,000Battery: CR123A

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P365 vs P365 XL vs X-Macro: Upgrade Compatibility

The P365 family shares a common fire control unit (FCU), but slide lengths, grip sizes, and rail configurations differ. Here is what crosses over and what does not.

Upgrade	P365	P365 XL	X-Macro
Grip Modules	3.1" slide grips	3.7" slide grips	3.7" slide grips + extended mag
Triggers	Compatible	Compatible	Compatible
Optics	Requires slide milling	Shield RMSc native	Shield RMSc native
Barrels	3.1" barrels	3.7" barrels (different)	3.7" comp barrels (different)
Lights	Rail-dependent	Picatinny rail	Picatinny rail

Key takeaway: Triggers are universally compatible across the P365 family. Grip modules and barrels are slide-length specific. Optics require a Shield RMSc-cut slide (standard on XL and X-Macro, requires milling on base P365). The X-Macro grip module adds 17-round capacity but changes the gun's size class significantly.

P365 Upgrade Comparison: Top Pick per Category

Category	Top Pick	Price	Why
Grip Module	Wilson Combat WCP365	$65	Best value, aggressive texturing, multiple colors
Trigger	SIG X-Series Flat	$79	Factory quality, drop-in, full warranty
Optic	Holosun EPS Carry	$389	Enclosed emitter, lint-proof for carry
Barrel	True Precision Match	$169	Match-grade accuracy, multiple finishes
Light	Streamlight TLR-7 Sub	$149	P365-specific fit, flush with muzzle

Total cost for all five top picks: $851. For a budget build, grip module + trigger alone ($144) delivers the most noticeable improvement.

Frequently Asked Questions

▶What is the best first upgrade for a SIG P365?

A grip module is the best first upgrade for the P365. The Wilson Combat WCP365 ($65) transforms the shooting experience with aggressive texturing and an improved grip angle, and the modular design means installation takes seconds with no tools. It has more impact on shooting performance per dollar than any other P365 upgrade.

▶Do P365 upgrades work on the P365 XL and X-Macro?

Most P365 upgrades are cross-compatible across the P365 family, but with caveats. Triggers, optics, and barrels are generally interchangeable between the P365, P365 XL, and P365 X-Macro. Grip modules depend on the slide length: a standard P365 grip fits 3.1-inch slides, XL grips fit 3.7-inch slides, and X-Macro grips fit 3.7-inch slides with extended 17-round magazines. Lights depend on the rail type and length. Always verify specific part compatibility before purchasing.

▶What red dot fits the SIG P365?

The P365 XL and optic-ready P365 models use the Shield RMSc footprint. Compatible optics include the Holosun EPS Carry ($389, enclosed emitter), Holosun 507K X2 ($289, multi-reticle), and Trijicon RMRcc ($549, forged aluminum). The standard P365 requires slide milling to accept a red dot. For daily carry, the EPS Carry is recommended because its enclosed emitter prevents lint and debris from blocking the dot.

▶Is the SIG X-Series flat trigger worth it for the P365?

Yes. The SIG X-Series Flat Trigger ($79) is a direct factory upgrade from the X-Macro and Spectre Comp line. It replaces the curved trigger with a flat face for more consistent finger placement and perceived shorter reset. It does not significantly change pull weight (still around 5.5-6 lbs), but the flat face improves consistency during rapid fire. Installation is drop-in and maintains your full SIG warranty.

▶What is the best P365 grip module for concealed carry?

The Wilson Combat WCP365 ($65) is the best P365 grip module for concealed carry. It provides aggressive texturing for a secure grip even with sweaty hands, an improved grip angle for natural point of aim, and it maintains the same compact dimensions as the factory grip. For shooters who want maximum recoil control and do not mind the added weight, the Icarus Precision ACE 365 ($329) adds aluminum construction that significantly reduces felt recoil.

▶Should I get a threaded barrel for my P365?

Only if you plan to run a suppressor or compensator. A threaded barrel extends past the muzzle, affecting holster compatibility and adding length. The True Precision Threaded Match Barrel ($169) offers match-grade accuracy potential with 1/2x28 threading. The SIG factory threaded barrel ($179) guarantees fitment and maintains warranty. If you are not running a muzzle device, the factory barrel is perfectly adequate for defensive accuracy.

Complete Your Build

Essential accessories to round out your setup

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Illumination • $119

Streamlight ProTac HL-X

✓1,000 lumens
✓50,000 candela

View on Amazon

Slings & Retention • $75

Magpul MS4 Dual QD Sling

✓Dual QD swivels
✓Convertible design

View on Amazon

Backup Iron Sights • $99

Magpul MBUS Gen 2

✓Polymer construction
✓Spring-loaded flip-up

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Slings & Retention • $22

Magpul QD Sling Swivel

✓QD swivel
✓Manganese phosphate

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Slings & Retention • $69

Blue Force Gear Vickers Sling

✓Padded
✓Quick-adjust

View on Amazon

Slings & Retention • $25

BCM M-LOK QD Sling Mount

✓M-LOK
✓QD socket

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