Handguards
Geissele Automatics Handguards
The MK16 won the USSOCOM URGI contract. Bought where an IR laser has to hold zero under load, which is a harder requirement than holding an optic.
Current handguards
| Model | Lengths | Attachment | Mounting | Notes |
|---|---|---|---|---|
| MK16 Super Modular Rail | 9.5, 10.5, 13.5, 15in | M-LOK | Proprietary barrel nut, bolt-up | USSOCOM URGI rail |
| MK4 Super Modular Rail | 7, 9.5, 11, 13, 15in | M-LOK | Proprietary barrel nut | Widely issued |
| MK8 Super Modular Rail | 7, 9.5, 13, 15in | M-LOK | Proprietary barrel nut | Slimmer than MK4 |
Line-up checked against the manufacturer's catalogue. Checked 2026-08-01