Samson Evolution Series Keymod Rail System – AR-15 Handguard
The Samson Evolution KeyMod Series free float rails are an innovative upgrade from the original Evolution Series. These handguards maintain the same features but now feature KeyMod slots at 3, 6, and 9 o’clock positions.
The Samson Manufacturing Evolution Series free float rails offer customizable options for your AR-15. The Evo rail is attached to a standard barrel nut via a two-piece stainless steel thermal bushing and is secured with two locking tabs to prevent rotation under stress. Ventilation slots and the thermal bushing prevent heat transfer to the handguard and operator’s hand. The continuous top rail allows for flexible optic placement and same-plane iron sight mounting, and is designed to accommodate most aftermarket piston systems. The Evo KeyMod handguards are compatible with KeyMod accessories and the interior tube measures 1.56" in diameter, fitting most suppressors.
KeyMod versions of the Evolution Series do not include accessory rails. Does NOT include a barrel nut (compatible with any MIL-SPEC barrel nut).
Features:
- Free-float
- Thermal bushings clip to any Mil-spec barrel nut
- Relieved for most gas piston systems
- No need to remove front sight base
- Rail includes integrated anti-rotation tabs
- 1913 Picatinny Mil-spec
- Precision laser engraving
- Forms continuous top rail
- Made in New Hampshire USA
- Material: 6061-T6 aluminum
- Finish: Black MIL-A-8625 type III class 2 anodizing
Alt description:
- keymod rail system
- evolution rail system
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- samson evolution handguard
- ar keymod rail
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Quick Links
- ar15 handguard
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- Pistol length handguard
- Carbine Length Handguard
- Mid Length Handguard
- Rifle Length Handguard
- 15"Handguard
- 13 inch handguard
- 14 inch handguard
- 15 inch handguard
- 17 inch handguard
Samson Manufacturing Quick Links
- Samson handguard
- Samson evolution handguard
- Samson vertical grip
- Samson magnifier
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- Samson m lok vertical grip
- Samson mini 14 stock
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Keymod Quick Links:
- Keymod
- Keymod accessories
- Keymod rail
- Keymod foregrip
- keymod grip
- Keymod Angled Foregrips
- keymod afg
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- Keymod vertical grip
- Keymod handstop
- Keymod attachments
- keymod light mount
- Keymod Handguard
- keymod bipod
| Model | Length (in) | Attachment | Gas System Length | Weight (oz) | ID (in) | OD (in) |
|---|---|---|---|---|---|---|
| EVO-KM-7 | 7 | KeyMod | Carbine | 7.3 | 1.56 | 1.8 |
| EVO-KM-7.6 | 7.6 | KeyMod | Low Profile Gas Block | 7.9 | 1.56 | 1.8 |
| EVO-KM-9 | 9 | KeyMod | Mid | 8.7 | 1.56 | 1.8 |
| EVO-KM-10 | 10 | KeyMod | Low Profile Gas Block | 9.3 | 1.56 | 1.8 |
| EVO-KM-11 | 11 | KeyMod | Low Profile Gas Block | 9.9 | 1.56 | 1.8 |
| EVO-KM-12.37 | 12.37 | KeyMod | Rifle | 10.9 | 1.56 | 1.8 |
| EVO-KM-15 | 15 | KeyMod | Low Profile Gas Block | 12.8 | 1.56 | 1.8 |





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