The Holosun SCS 320, part SCS-320-GR, is a 1x enclosed green dot sight that mounts straight onto SIG Sauer P320 optics-ready slides and charges itself from ambient light.
There is no battery tray on this sight because there is no removable battery. An internal cell charges from the panel on top, and Holosun quote 20,000 hours of reserve running once it is charged.
The housing is 7075 aluminium, rated IPX8 and tested to 5000G, weighing 1.35 oz and measuring 1.85 x 1.15 x 1.06 in over a 0.9 x 0.63 in window. The emitter is fully enclosed. Brightness is automatic, with a manual Brightness Override that holds maximum output for thirty minutes when it is called for, and Shake Awake handles standby. Windage and elevation move in 1.5 MOA clicks with 30 MOA of travel either way.
The Multi-Reticle System gives a 2 MOA green dot, a 32 MOA circle or the two combined, so the aiming reference can be matched to the job. Mounting is the point of this version: it is cut for the P320 slide pattern directly, with no plate to buy, lose or leave loose, and Holosun also list it against the DPP footprint. That specificity is the limitation too, since it is not an RMR- or RMSc-footprint sight and will not fit slides cut for those.
Why shooters choose the SCS 320
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Reticle — green Multi-Reticle System, a 2 MOA dot, a 32 MOA circle or circle-dot
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Power — internal rechargeable cell charged by light, with about 20,000 hours in reserve
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Mount — direct fit to SIG Sauer P320 optics-ready slides, no adapter plate
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Brightness — automatic, with a manual override giving 30 minutes at maximum
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Adjustment — 1.5 MOA per click and 30 MOA of travel each way
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Build — enclosed emitter in 7075 aluminium, IPX8 and 5000G rated, 1.35 oz
What the SCS 320 fits
It is cut for the SIG Sauer P320 optics-ready slide and the DPP footprint, so it is not interchangeable with RMR- or RMSc-pattern sights. The same solar-charging optic is made for other hosts: SCS MOS for Glock MOS slides, SCS P10 for the CZ P-10 and SCS Carry for slimline slides.
Specifications
| Type |
Enclosed green dot sight, 1x |
| Reticle |
2 MOA dot / 32 MOA circle / circle-dot, green |
| Window |
0.9 x 0.63 in |
| Mounting |
Direct to SIG Sauer P320 optics-ready slides; DPP footprint |
| Power |
Internal rechargeable cell, solar charging, approx. 20,000 hours reserve |
| Brightness |
Automatic, plus a 30 minute manual maximum override |
| Adjustment |
1.5 MOA per click, 30 MOA either way |
| Features |
Shake Awake |
| Dimensions |
1.85 x 1.15 x 1.06 in |
| Weight |
1.35 oz |
| Housing |
7075 aluminium, IPX8, 5000G |
| MPN |
SCS-320-GR |
Nothing to charge, nothing to replace and nothing to set before the first shot. Order the SCS 320 today — imported from the USA with all duties paid by us and dispatched tracked from the UK in 7–10 business days, with nothing to pay on delivery.
Explore more: Enclosed Red Dot Sights, SCS MP2 Green Dot or browse all Green Dot Sights
