Samson KM-EVO-1237 Evolution Keymod AR-15 Aluminum 12.37" Rail
The Samson KM-EVO-1237 Evolution Keymod Rail is a lightweight, free-floating 12.37" handguard designed for AR-15, M4, and M16 platforms. Made from 6061-T6 aluminium with a mil-spec hardcoat anodised finish, it features a KeyMod interface, integrated anti-rotation tabs, and thermal bushings for secure fit and heat resistance. Compatible with most gas piston systems, it includes a continuous 1913 Picatinny top rail for easy optic mounting, offering exceptional durability and performance for tactical, competition, or recreational use.
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The Samson KM-EVO-1237 Evolution Keymod AR-15 12.37" Rail is a premium upgrade for AR-platform rifles, engineered for shooters who demand both performance and reliability. Crafted from 6061-T6 aluminium and finished in MIL-A-8625 Type III Class 2 hardcoat anodising, this rail delivers outstanding strength while remaining lightweight, making it ideal for 3-Gun competition, tactical applications, and serious range use.
At 12.37 inches in length, the free-floating design ensures improved accuracy by eliminating pressure on the barrel, while its KeyMod interface allows for custom accessory placement without excess bulk. The rail system is relieved to accommodate most gas piston systems and does not require the removal of the front sight base, making installation straightforward. It also features integrated anti-rotation tabs, ensuring a secure, stable fit during rigorous use.
The KM-EVO-1237 includes thermal bushings that clip directly to any mil-spec barrel nut, enhancing heat resistance and maintaining structural integrity under sustained fire. With an inner diameter of 1.56 inches and an outer diameter of 1.8 inches, it offers ample clearance for most barrel profiles and gas blocks. The continuous 1913 Picatinny top rail and precision laser engraving provide a professional finish, ready for any optic or accessory setup.
Designed specifically for AR-15, M4, and M16 platforms, the Samson Evolution KeyMod Rail is a rugged, no-compromise solution for shooters looking to elevate their rifle's modularity and performance.
- Firearm Compatibility AR-15, M4, M16
- Handguard Type Free-floating
- Mounting System KeyMod
- Material 6061-T6 Aluminium
- Finish MIL-A-8625 Type III Class 2 hardcoat anodising
- Colour Black
- Length 12.37 inches
- Inner Diameter 1.56 inches
- Outer Diameter 1.8 inches
- Top Rail Continuous 1913 Picatinny
- Rail Compatibility Fits standard mil-spec barrel nuts
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Free-floating design to improve accuracy by eliminating barrel contact.
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Lightweight yet durable construction for enhanced handling without sacrificing strength.
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KeyMod mounting system for custom accessory placement and reduced bulk.
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Integrated anti-rotation tabs to ensure a secure, stable fit under recoil.
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Thermal bushings for improved heat resistance during sustained fire.
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Compatible with most gas piston systems, allowing broad platform versatility.
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No need to remove the front sight base for installation.
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Continuous 1913 Picatinny top rail for seamless optic and accessory mounting.
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Precision laser engraving for a professional, high-quality finish.
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Secure Mil-spec barrel nut attachment for reliable performance in all conditions.
- Samson KM-EVO-1237 Evolution Keymod AR-15 Aluminum 12.37" Rail
Please Note: Shipping charges may be subject to additional surcharges if out of area or over weight restrictions.
Please Note: DPD SHIPMENTS REQUIRE THE CUSTOMER TO SHOW A PIN CODE ON DELIVERY - READ MORE: HERE
COURIERS
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We use DPD , RoyalMail, TNT and UPS courier services for all our orders whether dispatching to the UK or International. As soon as your order has been dispatched you will receive an email with your unique tracking number.
IN-STORE ITEMS
These are items that we have in-stock and will be sent out for delivery as soon as possible. We aim to dispatch all orders within 1-2 working days, but during busy periods dispatch may be delayed by a day or so. If you would like to purchase the item in person then please call ahead to arrange an appointment: 01803 611 895.
PRE-ORDER ITEMS
These are usually items that are going to be out-of-stock for a number of weeks or are in short supply. By purchasing a Pre-Order Item you are in effect paying a deposit for your goods. As soon as the item is back in stock yours will be dispatched within 24 hours where possible. Please see individual product pages for current back-in-stock dates. In rare occasions, these dates can be changed by the manufacturers so we recommend staying in contact with Optics Warehouse depending on the product lead time.
INTERNATIONAL DELIVERY & TAXES
In addition to the above information If your delivery address is outside of the UK you may be subject to import duties and taxes, which are levied once a shipment reaches your country. Any such additional charges for customs clearance must be borne by you. You should note that customs policies vary widely from country to country. Optics Warehouse advises each customer to contact their local customs office for further information if they are in any way unsure of local duties or liabilities. Cross border shipments are subject to opening and inspection by customs authorities which means some packages may be opened and re-sealed.
NEED HELP?
If you require any further assistance, please call us on 01803 611 895 or email sales@opticswarehouse.co.uk
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A NOTE ABOUT DPD SHIPMENTS:
- Please be advised that we have now introduced DPD Pins to all DPD orders from Optics Warehouse.
- If your shipment is being sent from Optics Warehouse via DPD you will be sent a Pin Code that must be shown to the courier upon delivery.
- The pincode is sent VIA email & TEXT message. A valid email address and mobile number must be provided at checkout. Emails will be sent from "Riviera House 3PL" - if you do not receive this email please check your junk or spam folders.
- Please note that if you do not display your pin code to the courier driver upon delivery, you will not be able to have your item and you may need to schedule another delivery date to show a valid pin.
- Please view the attached slides HERE for further information!