Ultradyne C4 offset folding rear sight runs at 45 degrees off the rail. No battery needed since its iron sights - battery life is essentially infinite. Folds completely flat. Solid backup behind an LPVO that doesnt work great at 1x.






Click to see full view
Ultradyne
Overview
The Ultradyne USA C4 Offset Folding Rear Sight is designed for quick deployment and added versatility on the AR-15 platform. This folding sight features an offset design, allowing builders to maintain a low profile while providing rapid sight acquisition in various shooting scenarios. Commonly found in builds utilizing a carbine gas system and chambered in 5.56 NATO, it enhances the functionality of your rifle without adding unnecessary bulk.
Based on build data

Ultradyne Usa C4 Offset Folding Front Sight

Radian Raptor Charging Handle & Talon Safety Selector Combo - Od Green

Geissele Automatics Llc Ar-15 Ssa-E X Lightning Bow Trigger

Steiner Optics DBAL-D2 Dual Beam Aiming Laser with IR LED Illuminator - Black

Weaver Multi-Slot Base - 48400

EOTECH G45 5X Magnifier - Black
Aggregated and anonymized data showing how builders use this product
| Product | Category | Times Built Together |
|---|---|---|
| Ultradyne Usa C4 Offset Folding Front Sight | 34 | |
| Radian Raptor Charging Handle & Talon Safety Selector Combo - Od Green | 13 | |
| Geissele Automatics Llc Ar-15 Ssa-E X Lightning Bow Trigger | 13 | |
| Steiner Optics DBAL-D2 Dual Beam Aiming Laser with IR LED Illuminator - Black | 13 | |
| Weaver Multi-Slot Base - 48400 | 12 | |
| EOTECH G45 5X Magnifier - Black | 12 |
| Platform | Percentage |
|---|---|
| AR-15 | 100% |
| Caliber | Percentage |
|---|---|
| 5.56 NATO | 50% |
| .223 Wylde | 20% |
| .308 Win | 10% |
| .450 Bushmaster | 10% |
| 300 Blackout | 10% |
| Gas System | Percentage |
|---|---|
| Mid-Length | 40% |
| Carbine | 30% |
| Rifle | 20% |
| Pistol | 10% |
Builds in the community that include the Ultradyne Usa C4 Offset Folding Rear Sight
| Build | Parts | Total |
|---|---|---|
![]() | 24 | $6744.88 |
![]() | 31 | $7157.92 |
![]() | 27 | $2234.42 |
![]() | 25 | $4675.29 |
![]() | 28 | $1024.24 |
![]() | 24 | $3517.25 |
![]() | 18 | $4671.70 |
2 global ratings
Ultradyne C4 offset folding rear sight runs at 45 degrees off the rail. No battery needed since its iron sights - battery life is essentially infinite. Folds completely flat. Solid backup behind an LPVO that doesnt work great at 1x.
Ultradyne C4 offset folding rear sight runs at 45 degrees off the main rail. No battery needed since its iron sights. Folds completely flat when not in use. Solid backup behind an LPVO at 1x doesnt always work for close range.