Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 10 - Jul 15
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
Vector Optics Frenzy 1x16x21 Standard MOS Red Dot Sight SCRD-81 (GLK)Features Fits GLOCK Standard MOS Pistols, Mounts Directly Without Adapter for Lower Sight Height 3MOA Dot, 1621mm 0. 63x0. 83in Window, Only 33g 1. 16oz, Optimized for Pistol Use Motion Sensor Automatically Powers On Off No Worry to Forget to Switch Off the Sight Side Loading Battery Design Allows Easy and Quick Replacement Without Losing Zero Optical Paramaters Magnification N A Window Lens Size 16x21 mm 0. 63x0. 83 in Parallax Free ( 2 MOA) Parallax
Features
- Fits GLOCK® Standard MOS Pistols, Mounts Directly Without Adapter for Lower Sight Height
- 3MOA Dot, 16×21mm / 0.63x0.83in Window, Only 33g / 1.16oz, Optimized for Pistol Use
- Motion Sensor Automatically Powers On/Off No Worry to Forget to Switch Off the Sight
- Side-Loading Battery Design Allows Easy and Quick Replacement Without Losing Zero
Optical Paramaters
| Magnification | N/A |
| Window Lens Size | 16x21 mm / 0.63x0.83 in |
| Parallax | Free (≤ 2 MOA) |
| Parallax Setting | 33 yards / 30m |
| Dot Size | 3 MOA |
| Dot / Reticle Color | Red |
Mechanical Parameters
| Sensor | Motion Sensor |
| Click Value | 1 MOA |
| Elevation Adjustment Range | ≥ 120 MOA |
| Windage Adjustment Range | ≥ 120 MOA |
| Footprint | Fit for GLOCK® Standard MOS Pistols |
| Illumination Setting | 11 Gears (9 Daytime + 2 NV) |
| Battery Type | CR1632 |
| Battery Placement | Side Loading |
| Waterproof | IPX7 |
| Shockproof | 1500G |
| Working Temperature | -20 ~ +60 ℃ |
| Housing Material | 7075-T6 Aluminum Alloy |
| Finish | Matte Black |
| Weight | 33 g / 1.16 oz (Battery included) |
| Items in the Package | Hex Keys, Vekey, Cleaning Cloth, User Manual, etc. |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.8 ★★★★★
Based on 846 reviews
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Product Reviews
★★★★★ 5
Great no shows for people with larger feet
Size: Large, Color: (001) Black / Black / Castlerock
Some of my favorite socks!! Great quality, fit, and material. I love that they don't slip down in my shoes, especially considering I have larger feet. I also love that Under Armour offers larger sizes in their socks considering everyone in our household has much larger feet than others.
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Reviewed in the United States on May 3, 2026
★★★★★ 5
Best liner socks EVER
Size: Medium, Color: (348) Silica Green / Silica Green / Hydro Green
I have them in every color and used to get them from Sams, but they stopped selling them and I was lucky to find them on Amazon. Got all colors again. They stay, it's all I'm gonna say! And don't show in any of my tennis shoes. Absolutely love them and wear them until they get holes. They last a LONG time too. They're on the thin side and my foot loves them because they tend to get hot. There's no shrinking, they wash great with exception of the white ones I couldn't manage to keep white - they turned a bit greyish.
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Reviewed in the United States on January 4, 2026
★★★★★ 5
Great socks
Size: Medium, Color: Pink - 647
Well-made and comfortable to wear. Great for golf and other outdoor activities. Like them because they do not show above shoes.
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Reviewed in the United States on April 19, 2026
★★★★★ 5
These ACTUALLY stay put all day long - I was skeptical, but am so glad I took a chance on these
Size: Medium, Color: (014) Halo Gray / Halo Gray / Castlerock
I was so skeptical about whether these would stay on my feet all day without sliding down into my shoe - I’ve tried so many socks in the past with the silicone strip on the heel which failed.
I’ve owned these for a couple months now and they have never slipped down - they stay put all day! I love the variety of colors to choose from, and the value per pack is great since six pairs come per pack (I thought it was only three when I first purchased and was pleasantly surprised by the additional pairs). They also have perfect thickness - not too warm to wear during the summer months with sneakers; I live in a tropical climate, though, so I’m not sure how they will do in cooler climates. I’ve washed each pair once or twice and the color and quality of the silicone has stayed so far (knock on wood).
Overall: high recommend based on my experience so far!
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Reviewed in the United States on September 13, 2025
★★★★★ 5
Great fit!
Size: Medium, Color: (403) Washed Navy / Washed Navy / Blue Smoke
Great quality!
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Reviewed in the United States on May 15, 2026
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