The Velocity Defense V1 Slide for Sig P365, a game-changing customizable platform available in both Standard and XL variations, and in sleek Black (DLC) or sophisticated Grey (PVD) coatings.
Crafted from high-quality 17-4 stainless steel, the Velocity Defense V1 Slide delivers unmatched durability and performance. Our V1 fully design comes with an RMR plate and screws pre-installed, making it a hassle-free upgrade for your Sig P365.
The slide features a dual cut optic pattern, allowing for seamless mounting of various micro footprint red dot sights. To ensure a perfect fit, an optic shim is included with every purchase, along with two RMRcc bushings.
Enhancing its gripping capabilities, the Velocity Defense V1 Slide incorporates the innovative “enhanced grip feature” (E.G.F. Cuts). These unique cuts provide a secure gripping surface for easy slide manipulation, enhancing your shooting experience.
Our slides are built to withstand the harshest conditions, thanks to extremely durable Black (DLC) or Grey (PVD) coatings, ensuring both performance and aesthetics for years to come.
Slide Compatibility:
- Standard Slide: Fits Sig P365, Sig P365x, and Sig P365 Optics Ready models with 3.1″ barrels.
- XL Slide: Compatible with Sig P365XL, Sig P365 Xmacro, and Sig P365 Spectre models featuring 3.7″ barrels.
Optic Compatibility: The Velocity V1 Slide for Sig P365 supports a wide range of micro footprint red dot sights, including:
- Trijicon RMRcc (No Shim required)
- Shield RSMc, SMSc, RMSx
- Holosun EPS Carry
- Holosun 507k
- Sig Sauer Romeo Zero & Romeo Zero Elite
- Swampfox Sentinel
- *Other red dot sights with the same footprint as the ones listed above.
VELOCITY DEFENSE FOR SIG P365 SLIDE INSTALLATION INSTRUCTIONS
Specs
- Material: 17-4 Stainless Steel
- Coating: Black (DLC) | Grey (PVD)
- Dimensions: XL Slide OVL 3.67” | Standard Slide OVL 3.06” | Width .900”
- Weight: XL Slide 7.45 oz | Standard Slide 6.46 oz
- Screw hole threads: RDS Cover Plate – 6-32 | Trijicon RMRcc – 5-40 | Micro RDS – M4
Includes
- Stripped P365 Slide assembled with RDS cover plate and 2, 6-32x.190 RDS cover pate screws installed.
- Micro Optic Shim – for micro footprint red dots
- RMRcc bushings qty 2
- 5-40x.375 Cap Screw qty 2 (For RMRcc)
Features
- Dual Cut optic pattern
- E.G.F. Cuts
- Extremely Durable Coating
Slide Compatibility
- Standard Slide – Sig P365, Sig P365x, Sig P365 Optics Ready (All for 3.1” Barrels)
- XL Slide – Sig P365XL, Sig P365 Xmacro, Sig P365 Spectre (All for 3.7” Barrels)
Optics Screw Sizes
- Trijicon RMRcc: 5-40
- Red Dot Cover Plate: 6-32
- Sig Romeo Zero, Holosun 407K/507K: M3 x 0.7
COMPATIBILITY NOTES:
- Velocity Defense for Sig P365 ST and XL slides are compatible with Sig Sauer’s upgraded extractors.
- Velocity Defense for Sig P365 ST slides ARE compatible with the Radian Ramjet setup.
Manufactured in Tumwater, WA, USA.

















McKinley Shifflett (verified owner) –
This slide didn’t disappoint when I unboxed it today, beautiful design with high quality workmanship. My holosun 407k fit perfectly as long as you kept the screws that came with the red dot box. Can’t wait to get the barrel next! Highly recommend! Wish I could post pics to the review. Can’t say enough good stuff about it
Grant Hounsell (verified owner) –
Great slide! Paired with a true precision threaded barrel, Herrington Arms comp, Holosun 507k, dpms recoil system and set on a Icarus Precision XL+ Macro grip module. Has run flawlessly right from the first round! Amazing!
David Barnes (verified owner) –
Purchased the slide and barrel and both arrived on time and both fit perfectly. No hassles during the process of retrofitting the firing pin assembly and the extractor from the factory slide to the new Killer Innovations slide. After assembly, I went to the range and fired around 400 rounds. No misfires, no failure to eject, no nothing. Everything worked perfectly. Great products from a great company. Congrats on being at the top of your game.
jerlafiii (verified owner) –
All I can say is “Awesome”! looks so good with the stainless, fluted BarSto barrel. Haven’t fired it yet but I am sure that it will be plus experience. (Fyi I have a 4.5 inch fluted barrel in 30 Super Carry, ya have to bend the mag feed lips in just enough to hold the cartridges)
reyes.elvin (verified owner) –
Nice clean design, excellent craftsmanship! Paired with a Radian afterburner+ramjet setup on an XMacro. Fitted with a Holosun 507Kx2. Minor filing required on the shim to get the optic mounted.
saschaindy (verified owner) –
I have to say I was a little nervous when I bought this, but it has proven to operate flawlessly. I haven’t shot the 400 rounds so far but I have shot 328 rounds through it and haven’t had any malfunctions. It lowered the weight of my standard P365 w optics cut out the from
8 7/8 oz to 7 1/8 oz.
I have shot std. 115 gn fmj, as well as few underwood Xtream Defender 90gn in standard and +P (which weighs less) and no issues. I also carry with a Raven Concealment Vangaurd 2 trigger guard holster and have had no snag issues drawing from the cut outs.
The slide does get hot quickly when shooting so I would advise to let it cool down a bit after every 20-30 rounds. Also the cutouts make thumb placements a little different.
If you’re looking to lower the weight this is a sold option and performs excellent.
If you’re looking to lower the weight of your P365 this is a solid option.
iiishanks (verified owner) –
I’ve shot 2000 rounds plus, zero issues. Love this slide, so much I got it for the p320 flux raider build as well.