This complete lower parts kit includes all the upgraded pieces from Sigs' voluntary drop-safe recall. This kit is completely compatible with any upgraded Sig P320 slide in 9/40/357. This kit will not work with the .45 ACP Sig P320 or a .45 80% build as there are a few pieces that are different.
Includes the following pieces:
- Lightweight Adverse Trigger
- Sear Housing
- Sear
- Safety Lever
- Trigger Bar
- Takedown Safety Lever
- Takedown Lever with O-Ring
- Mechanical Disconnector
- Trigger Bar Spring
- Sear Spring X2
- Takedown Safety Lever Spring
- Sear Housing Pin
- Trigger Bar Stop Pin
- Sear Pin
- Slide Catch Lever Pin
- Safety Lever Pivot Pin
*The FCU is not included.
12 Reviews Hide Reviews Show Reviews
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Solid Foundation for Custom Work
Planning a custom build on my P320 slide, I decided to refresh the lower with this kit first. Everything was there that I needed, and it made the rest of the build that much easier.
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Good Update After Many Rounds
After thousands of rounds on my P320, a few parts were showing wear. This kit was the perfect solution, and everything fit back together without surprise fitting issues.
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Reliable Replacement Parts
The parts themselves feel solid and built to spec, and my gunsmith said the fit tolerances were good. It’s nice to have everything in one package for a complete lower assembly.
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Comprehensive Kit for P320 Users
This kit came with all the bits I expected — didn’t have to run back to the parts drawer halfway through. My P320 Compact feels more reliable with fresh internals.
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OEM-Grade Fit Without Hunting Parts
I looked everywhere for individual parts until I found this kit. It’s all OEM-grade stuff, and it took the guesswork out of matching pins and springs. Works perfectly with my 9 mm carry model.
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Smooth Install and Better Feel
Replaced some tired springs and pins with this kit and now my P320 feels much more consistent to disassemble and reassemble. Doesn’t fix everything, but it’s a great foundation for maintenance.
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Lots of Components Included
I appreciated that this kit included all the small parts I needed instead of piecing replacements together. Everything fit as expected and made the rebuild much less of a headache.
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Worth It for Older P320s
Picked up this parts kit for my older compact P320 and it brought everything back to life. Trigger reset feels more positive and there’s less slop in the controls now. Very happy with the update.
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Quality Pieces and Easy to Install
I’m not a gunsmith but I could install this kit with basic tools. All the parts were well made and matched the factory tolerances. My trigger pull is crisper now that worn components are replaced.
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Great Value for a Refresh
My P320 had some worn springs and detents from heavy use. This kit fixed all that with OEM-compatible parts, and the install was logical and straightforward. Feels like a new gun when stripped and reassembled.
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Complete Kit Made Maintenance So Much Easier
This parts kit had everything I needed for a full lower refresh on my P320 Compact. I was surprised how comprehensive it was — saved me from buying parts one-by-one. Very pleased with quality.
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Finally Rebuilt My P320 FCU
I used this parts kit to refresh the fire control unit on my P320 9 mm after a long season of range use. All the pieces fit well together and it gave the pistol a noticeably smoother feel during breakdown and reassembly.
