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Geissele’s Super Modular MK4 Rail is used by the Federal Bureau of Investigation due to its strength, modularity, and M-LOK compatibility. It features M1913 picatinny rails in the 6 o’clock and 12 o’clock positions, as well as shorter M1913 picatinny rails in the front 3 o’clock and 9 o’clock positions.
| UPC | 817953027912 |
|---|---|
| Manufacturer | Geissele Automatics |
| Manufacturer Part Number | 05-430S |
| Model | MK4 Federal |
| Product Type | Handguard |
| Style | M-LOK |
| Length | 10 |
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