What is AVCI? The combat optic built for the MPT-76
Quick answer: AVCI is the combat optical sight family of 3E Elektro-Optik and the company’s best-known product line: according to reporting by DefenceTurk, the AVCI 1x-4x was developed for the MPT-76 national infantry rifle. The family today consists of four models: the lever-switched AVCI 1x-4x HX and SX, the AVCI 1.5x-6x HX, and the fixed-magnification AVCI 4x. All use a glass-etched BDR reticle calibrated for 5.56 mm and 7.62 mm NATO ammunition.
The dual-role sight approach
Instead of a conventional zoom ring, the variable-magnification members of the AVCI line use a two-position side lever: the sight is either in close-range mode (1x or 1.5x) or in magnified mode (4x or 6x), with no intermediate steps. The manufacturer ties this design to switching modes with a single lever throw rather than hunting for a magnification setting during an engagement. Eye relief stays fixed at 72 mm in both modes, and because the reticle is etched into the glass, the aiming pattern remains visible even if the power supply fails.
Family table
| Model | Magnification | Field of view | Weight | Distinguishing feature |
|---|---|---|---|---|
| AVCI 1x-4x HX | 1x / 4x lever switch | 24 – 6 degrees | 660 g | Reflex sight interface, IP67 |
| AVCI 1x-4x SX | 1x / 4x lever switch | 26 – 6.5 degrees | 653 g | R1x reflex sight standard, NV-compatible illumination |
| AVCI 1.5x-6x HX | 1.5x / 6x lever switch | 16 – 4 degrees | 735 g | 46 mm objective, lockable elevation dial |
| AVCI 4x | Fixed 4x | 8 degrees | 570 g | 13 illumination levels, motion sensor, IP68 |
Values are manufacturer statements. All four models have windage and elevation adjustment in 0.1 mil increments (100 MOA of travel on the AVCI 4x); mounting is compatible with MIL-STD-1913 and STANAG 4694 rails.
The BDR reticle and ammunition matching
The family’s common reticle, BDR, is a stepped bullet-drop-compensating pattern etched into the glass. The manufacturer says it offers separate variants for 5.56 mm and 7.62 mm NATO, with patterns marked from 100 meters out to machine gun ranges. Illumination has 10 levels; the SX model includes lower settings compatible with night vision devices, and the sight is positioned to work behind night vision monoculars such as the M14.
What sets the SX apart: a reflex sight ready on top
The AVCI 1x-4x SX comes with an R1x reflex sight mounted on top as part of the standard kit; since the interface uses the RMR pattern, other compatible micro sights can also be fitted. On the HX models the top interface is left empty; users can add a product from 3E’s reflex sight family as a backup aiming line if they wish. This architecture is the domestic implementation of combining a day optic and a close-range red dot on a single rail.
The MPT-76 context and its limits
The MPT-76 is the 7.62 mm national infantry rifle produced by MKE and Kale Kalip; developing AVCI for the rifle’s optics requirement made 3E visible in individual weapon optics. That said, which units have received how many sights, the scope of current procurement contracts and the distribution across the inventory have not been officially disclosed. The family’s place in the catalog and its relationship to the other product groups are covered in the 3E products guide, and the company’s overall profile in the company file. On the thermal side, the family’s counterpart is the PARS series.
Frequently asked questions
Which rifle was AVCI developed for?
According to reporting by DefenceTurk, the AVCI 1x-4x was developed for the MPT-76 national infantry rifle. The sights can also be mounted on other weapons with standard MIL-STD-1913 and STANAG 4694 rails.
What is the difference between HX and SX?
The SX model ships with an R1x reflex sight mounted on top as standard, offers night-vision-compatible illumination and a wider 26-degree field of view. The HX model does not include a reflex sight; one can be added to the top interface later.
What is the BDR reticle?
BDR is a stepped, glass-etched reticle that compensates for bullet drop. It comes in variants calibrated for 5.56 mm and 7.62 mm NATO ammunition and remains visible without power.
Why is there no continuous zoom on AVCI?
The design is built around two fixed modes: 1x-1.5x for close range and 4x-6x for distance shooting. The manufacturer says the instant lever switch prevents getting lost in the zoom range during an engagement.
Can AVCI be used at night?
The SX model’s illumination is compatible with night vision devices, and the sight can also work with clip-on night vision or thermal devices mounted in front. Since it contains no tube or sensor, it does not produce a night image on its own.
Sources and verification note
- https://3eeos.com/catalog/avci-1x-4x-g2 — Accessed: August 13, 2026
- https://3eeos.com/catalog/avci-1x-4x-gi — Accessed: August 13, 2026
- https://3eeos.com/catalog/avci-1-5x-6x-gi — Accessed: August 13, 2026
- https://3eeos.com/catalog/avci-4x — Accessed: August 13, 2026
- https://www.defenceturk.net/milli-tufeklerin-optik-ureticisi-3enin-elektro-optik-cozumleri — Accessed: August 13, 2026
Technical values are manufacturer statements. MPT-76 procurement quantities and contract details have not been officially disclosed; no estimates have been made on these points.
