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Madbull SI Mega Fins KeyMod Rifle Handguard Rail 11"
Key Features
- 11-inch KeyMod rail co-designed by Strike Industries and Madbull
- Internal “Mega Fins” for enhanced barrel heat dispersion
- Full heptagonal (7-sided) KeyMod interface for flexible accessory mounting
- Continuous Picatinny 1913 top rail for optics and sights
- Lightweight alloy construction with a rugged matte finish
- Ergonomic, slimline design for improved rifle handling
Full Control, Zero Compromise – Optimise Your Rifle
Description.
The Madbull SI Mega Fins KeyMod Rifle Handguard Rail 11" brings the ideal balance of length, weight, and modularity to your AR build. Built through the acclaimed collaboration between Madbull and Strike Industries, this rail delivers reliable performance with a tactical edge. Its internal “Mega Fins” act as built-in heat sinks, efficiently drawing away barrel heat and maintaining performance under extended firing sessions—making it a go-to for serious airsoft or live-fire use.
Featuring a full 7-sided KeyMod system, this handguard gives you total freedom to mount your tactical accessories at any angle—flashlights, bipods, laser sights, grips—you name it. The uninterrupted Picatinny top rail ensures full compatibility with your chosen optics and backup iron sights, while the slim, contoured profile enhances your control without adding bulk. It's the perfect upgrade for those building out a mid-length AR-15 or M4 rifle that demands both style and functionality.
Whether you're creating a custom tactical rifle or enhancing a competitive platform, the Madbull SI Mega Fins 11" rail offers premium build quality and performance-ready design that won’t let you down.
Other Great Features are,
- Easy installation with secure fitment hardware
- Ideal length for balance between control and accessory space
- Heat-resistant structure supports high-volume shooting
- Compatible with most modern AR-15 and M4 builds
In the box:
- 1x Madbull SI Mega Fins 11" KeyMod Handguard
- Mounting hardware
- Installation guide
Specifications
Length: 11 inches
Material: Lightweight alloy
Rail System: 7-sided KeyMod with continuous Picatinny top rail
Cooling Design: Internal Mega Fins for heat dispersal
Compatibility: AR-15/M4 platforms
Seen the Madbull SI Mega Fins KeyMod Rifle Handguard Rail 11" for less elsewhere? Tell us—we’ll beat the price. Visit our price match page for more info.
Sku :
17955Product Reviews
Delivery Prices start from just £2.50 with free delivery on orders over £75 To the uk mainland *.
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Free Shipping
Free shipping on orders over £75 To UK Mainland (excluding some parts of scotland)
Free shipping on orders over £100 To Northern Ireland & the Republic of ireland, Scottish highlands & islands, and I.O.M
Sorry we do not offer free shipping to the Channel Islands
Free shipping is a 5 working day service* (if you order Monday you get it the next Monday)
Delivery price (Mainland UK)
Royal Mail (depending on weight) (2 Days Delivery*) From £2.50
Economy (post as much as you want) (2 to 4 Days Delivery*) £4.95 Flat Rate
Express shipping (post as much as you want) (1 to 2 Days Delivery*) £5.95 Flat Rate
*Working days (Saturday and Sunday are classed as non working days)
we can arrange a Saturday delivery on request but costs £20 and you will need to call us to pay the balance after making an order.
Delivery price (Ireland, Scottish Highlands & Islands)
Northern Ireland From £ 5.95
Highlands and islands From £5.95
I.O.M From £5.95
Republic of Ireland £6.95 (Flat Rate how ever big or small your order is)
Channel Islands £ 7.95 (Flat Rate how ever big or small your order is)
Delivery price (International Tracked)
(Flat Rate how ever big or small your order is)
Republic of Ireland (IRL)---- £6.95 Price Drop WAS £16
Belgium (BE)--------------- £7.95 Price Drop WAS £15
Netherlands (NL)---------- £6.95 Price Drop WAS £15
Germany (DE)-------------- £6.95 Price Drop WAS £25
Luxembourg (LUX)--------- £9.95 - NEW
France (FR)----------------- £9.95 Price Drop WAS £25
Austria (AT)---------------- £11.95 - NEW
Greece (GR)---------------- £12.95 - NEW
Sweden (SE)-------------- £14.95 - NEW
Denmark (DK)------------ £9.95 Price Drop WAS £15
Finland (FI)--------------- £15.95 - NEW
Italy (IT)------------------ £11.95 Price Drop WAS £16
Portugal (PT)------------- £11.95 Price Drop WAS £18
Poland (PL)----------------- £9.95 - NEW
Spain (ES)----------------- £12.95 Price Drop WAS £23
Sweden (SE)-------------- £11.95 Price Drop WAS £15
Slovakia (SK)------------- £11.95 - NEW
Slovenia (SL) ------------ £11.95 - NEW
Croatia (HR)-------------- £16.95 - NEW
Czech Republic (CZ)----- £10.95 - NEW
Hungary (HU)------------ £10.95 - NEW
Bulgaria (BG)------------ £14.95 - NEW
Romania (RO)------------ £13.95 - NEW
Switzerland (CH)--------- £12.95 - NEW
Turkey (TR)--------------- £17.95 NEW
Channel Islands ----------£ 7.95 Price Drop WAS £15
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