Sig Sauer 3659GXR3P P365 Micro-Compact 9mm Luger 10+1 3.10″ Black Barrel, Moss Green Stainless Steel Optic Ready/Serrated Slide, Black Alloy Frame w/Accessory Rail, Textured Grip, RMSc Footprint
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About this product
The Sig Sauer 3659GXR3P P365 Micro-Compact 9mm Luger 10+1 3.10″ Black Barrel, Moss Green Stainless Steel Optic Ready/Serrated Slide, Black Alloy Frame w/Accessory Rail, Textured Grip, RMSc Footprint is a striker-fired 9mm that delivers a clean, crisp trigger pull right out of the box. Lightweight and easy to conceal, this P365 is rated for +P ammunition and comes with XRAY3 Day/Night sights, a Nitron-finished optic-ready slide, and a modular polymer grip module. Includes two 10-round magazines.
| Manufacturer | Sig Sauer |
|---|---|
| Model | P365 (3659GXR3P) |
| Material | Moss Green Stainless Steel slide, Black Alloy frame (per manufacturer specs) |
| Compatibility | RMSc footprint red dot optics |
| Finish | Nitron on slide, black anodized alloy frame |
| Weight | 17.8 oz (empty, per Sig Sauer) |
| Condition | New |
Key Features
- Optic-Ready Slide with RMSc Footprint – Why it matters: You can mount a micro red dot without milling the slide, giving you faster target acquisition for everyday carry.
- Moss Green Stainless Steel Slide with Serrations – Why it matters: The serrations give you a sure grip when racking the slide, even in wet or gloved conditions, and the green finish stands out on the range.
- XRAY3 Day/Night Sights – Why it matters: Tritium front and rear sights let you see your dots in low light, so you're not caught off guard at dusk or in a dark room.
- Textured Grip with Accessory Rail – Why it matters: The grip texture locks the gun in your hand without being abrasive, and the rail lets you attach a light or laser for home defense.
- Striker-Fired Trigger with Clean Break – Why it matters: The trigger breaks at about 5.5 to 6 pounds with a short reset, making follow-up shots fast and consistent.
Who It's For
This P365 is built for everyday carriers who want a micro-compact that doesn't skimp on capacity or reliability. It's a great choice for new gun owners looking for a do-it-all 9mm that conceals easily under a T-shirt or jacket. Experienced shooters will appreciate the RMSc footprint for mounting their favorite optic and the +P rating for defensive loads.
Pros & Cons
- Pro: 10+1 capacity in a frame that's barely larger than a subcompact .380.
- Pro: Factory optic-ready with XRAY3 night sights included – you don't need to buy extra sights if you run a dot.
- Pro: Reliable with a wide range of 9mm ammo, including +P hollow points.
- Con: The factory trigger has a bit of take-up before the wall – some shooters prefer a shorter pre-travel, but it's consistent and safe for carry.
Comparison
| Feature | Sig Sauer P365 (this model) | Zev Technologies OZ9C | Agency Arms Syndicate |
|---|---|---|---|
| Capacity | 10+1 | 15+1 (with extended grip) | 15+1 |
| Slide | Moss Green stainless, Nitron finish | Black nitride, serrations | Black DLC, serrations |
| Optic Cut | RMSc footprint | RMR footprint | RMR footprint |
| Weight (empty) | 17.8 oz | 22.5 oz | 21 oz |
| Price | $523.24 | $1,299 | $1,495 |
| Best For | Deep concealment, budget-friendly | Competition, full-size carry | Custom builds, race guns |
FAQ
What is the RMSc footprint and which red dots fit this slide?
The RMSc footprint is a micro red dot mounting standard used by Sig Sauer, Holosun (407K/507K), Swampfox Sentinel, and others. This slide is cut specifically for that pattern, so you can mount a dot without an adapter plate.
Does this P365 come with night sights?
Yes, it comes with Sig Sauer XRAY3 Day/Night sights. The front and rear tritium inserts glow in low light, and the white rings around them give you a bright aiming point during the day.
Can I use +P ammo in this gun?
Yes, per Sig Sauer specs the P365 is rated for +P ammunition. For everyday carry, I recommend running a box of your chosen +P defensive load through it to confirm reliability.
What magazines are included?
Two 10-round flush-fit magazines. They have a steel body and polymer basepad, and they drop free from the grip.
Is the grip module replaceable?
Yes, the polymer grip module is modular and can be swapped out for other P365 grip modules (including the XL or X-Macro frames) with different sizes and textures.
Last updated: April 2026
According to industry data, the Sig Sauer P365 series has captured over 25% of the micro-compact carry market since its launch. That kind of adoption tells you it's a design that works.
Trust & Delivery
- ✓ Nationwide delivery (all 50 states) – we ship to your FFL
- ✓ Ships 1-2 business days from order
- ✓ 30-day return policy on new, unfired firearms
- ✓ Secure checkout with encryption
Explore more handguns in our Micro-Compact Handguns category, or check out Sig Sauer P365 Parts & Accessories for holsters, sights, and magazines. For red dot options, see our Pistol Red Dots.