Vector Optics MAG Red Dot Lower 1/3 Co‑Witness Cantilever Weaver Polymer Mount
The Vector Optics MAG Lower 1/3 Co-Witness Polymer Mount (SCFRM‑11) is a lightweight and durable riser engineered to position MAG‑footprint red dot sights at a lower third co-witness height. Ideal for pistol shooters and IPSC competitors, this cantilever-style mount offers fast alignment, a non-metal construction, and compatibility with 21 mm Weaver rails.
Core Features & Functional Benefits
- Low-Profile Cantilever Design: 28 mm (1.1 in) saddle height provides comfortable lower ⅓ co-witness with standard iron sights, allowing fast transitions to red dot views.
- MAG Footprint Compatibility: RMS‑C format supports Vector Optics Frenzy‑S MIC and AUT red dot sights, ensuring seamless fit.
- Polymer Construction: Made of shock-resistant plastic polymer—lightweight (~23 g / 0.8 oz), yet engineered for durability and real-fire reliability.
- Weaver Rail Integration: Designed to securely lock into 21 mm Weaver (or Picatinny) rails with consistent clamping force.
- Compact Profile: Measures only 36 mm in length and 40.8 mm receiver plate length, offering minimal added footprint on the rail.
Technical Specifications
| Feature |
Specification |
| Tactical Height (saddle) |
28 mm / 1.1″ |
| Receiver Plate Length |
40.8 mm / 1.6″ |
| Receiver Plate Width |
23 mm / 0.9″ |
| Mount Length |
36 mm / 1.4″ |
| Weight |
23 g / 0.8 oz |
| Material |
Plastic Polymer |
| Finish |
Black Matte |
| Rail Interface |
21 mm Weaver / Picatinny |
| Optic Footprint |
MAG (RMS‑C compatible) |
| Compatible Sights |
Vector Optics Frenzy‑S MIC & AUT |
| Saddle Height Purpose |
1/3 lower co-witness |
Usage Scenarios
This mount is perfect for users mounting MAG‑footprint red dots on pistols, PCCs, or competition rifles where retaining iron sight sightlines is critical. The co-witness height allows you to use iron sights while keeping the red dot in standby. The lightweight polymer build supports everyday carry without adding noticeable bulk.
Box Contents
- Vault‑style Cantilever Polymer Mount SCFRM‑11
- Installation screws (pre-installed if required)
- User manual (if included)
Summary
The Vector Optics MAG 1/3 Co-Witness Polymer Mount offers a lightweight, low‑profile mounting solution for MAG‑footprint red dot sights. With its 28 mm cantilever position, Weaver compatibility, and rugged polymer design, it is ideal for shooters needing fast target acquisition and iron sight backup in compact platforms. A dependable and ergonomic accessory for dynamic shooting applications.
