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Ultradyne
Overview
The C2 Folding Offset Rear Sight from Ultradyne is a rear sight designed for versatility and quick deployment, featuring a folding mechanism that allows it to stay out of the way when not in use. This sight does not include illumination, which keeps its profile low and simple, making it ideal for use in various lighting conditions without added complexity. Builders often incorporate this rear sight in tactical setups where a backup sighting solution is needed alongside optics.
Based on build data

Law Tactical AR Folding Stock Adapter Gen 3 - HK
Stock Adapter
BLEM PSA AR15 Complete Classic Stealth Lower, Black
Lower Receiver
Battle Arms Development Rack Ambidextrous Ar-15 Charging Handle - Mod C
Charging Handle
Magpul AFG-2 Angled Fore Grip - Black
Foregrip
Strike Industries AR-10 Shift Pins, Black - SI-AR10-SHIFT-BK
Takedown Pin
Expo Arms Ar-15 Carbine Buffer Spring - 17-7 Steel
Buffer SpringAggregated and anonymized data showing how builders use this product
| Product | Category | Times Built Together |
|---|---|---|
| Law Tactical AR Folding Stock Adapter Gen 3 - HK | Stock Adapter | 27 |
| BLEM PSA AR15 Complete Classic Stealth Lower, Black | Lower Receiver | 19 |
| Battle Arms Development Rack Ambidextrous Ar-15 Charging Handle - Mod C | Charging Handle | 18 |
| Magpul AFG-2 Angled Fore Grip - Black | Foregrip | 16 |
| Strike Industries AR-10 Shift Pins, Black - SI-AR10-SHIFT-BK | Takedown Pin | 16 |
| Expo Arms Ar-15 Carbine Buffer Spring - 17-7 Steel | Buffer Spring | 15 |
| Platform | Percentage |
|---|---|
| AR-15 | 84.8% |
| AR-10 | 12.5% |
| AR-9 | 2.7% |
| Caliber | Percentage |
|---|---|
| 5.56 NATO | 70.6% |
| .223 Wylde | 12.7% |
| .308 Win | 7.8% |
| 300 Blackout | 2.9% |
| 9mm | 2% |
| .450 Bushmaster | 2% |
| 7.62x51 NATO | 1% |
| .223 Remington | 1% |
| Gas System | Percentage |
|---|---|
| Mid-Length | 44.2% |
| Carbine | 29.9% |
| Rifle | 19.5% |
| Pistol | 5.2% |
| Blowback | 1.3% |
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