$0 Hazmat Fee On All Primer & Powder Orders - STOCK UP NOW!

$0 Hazmat Fee On All Primer & Powder Orders - STOCK UP NOW!

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GEISSELE AUTOMATICS LLC HK416/MR556/BRN-4® SUPER MODULAR RAIL MLOK® MK15

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$463.00 - $525.00

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Made In The U.S.A.

Products marked with the Stars and Stripes are proudly made in the U.S.A.

Many customers have asked us to show which products are made in America, and we’ve begun working with our vendors to identify them. This information, however, is not available for all items nor does it imply that foreign merchandise is of lesser quality. We will continue to gather this information to assist our customers in making informed buying decisions, and will keep our website current with the latest information.

Guaranteed. Forever.®

We make purchasing and returning products as simple as possible. If you buy a product from Brownells and decide you don’t need it, don’t want it, or just don’t like it, we’ll take it back any time… with a few exceptions

Exceptions include: 

  • Firearms
  • Ammunition
  • Modified 80% frames & receivers 
  • Gun powder
  • Primers
  • Liquids
  • Limited Quantity/Hazardous items
  • Products that are subject to pending or implemented restrictions due to Federal, State, or Local regulation/legislation

All other products are Guaranteed. Forever.® you can easily identify these products by the Guaranteed. Forever.® Icon.

Guaranteed. Forever.

Guaranteed. Forever.® return policy applies to the product’s original owner along with proof of purchase. Any items returned within 45 days of shipment are entitled to a refund. Any items returned after 45 days of shipment will be issued store credit in the form of a Brownells Gift Card. If a Brownells/Sinclair product was purchased through another retailer as a new product we will require proof of purchase to replace or refund.  (Refund will be issued as store credit in the form of a Brownells gift card.)  

The Super Modular Rail HK416 MK15 MLOK was designed to replace the standard rail on an HK416 or MR556 weapon platform. The rail system utilizes the stock HK barrel nut, but incorporates the strength, rigidity and modularity expected of a Geissele product. Made from 6061-T6 aluminum and finished in type 3 hardcoat anodize, the SMR HK416 MK15 meets military specifications.

Featuring MLOK mounting options at the 3, 6 and 9 o-clock positions, as well as featuring a full picatinny rail along the top and shortened picatinny rails on the forend. The Geissele SMR HK416 MK15 is trusted by our Nation’s elite warfighters, and their input was taken into consideration while developing the feature and performance rich SMR HK416 MK15.

  • Height: 2.61"
  • Color: Black or DDC
  • Material: 6061-T6
  • Finish: Type 3 Hardcoat Anodize
  • Length: 10.5” (actual rail length 9 3/8”) or 14.5" (actual rail length 13 5/8")
  • Inner Diameter: 1.35"
  • Outer Diameter: 2.08"
  • HK416 14.5" Weight: 14.2oz
  • HK416 10.5" Weight: 10.4oz

Disclaimer: If the HK upper receiver group has sling loops on the outside of the gas block they will need to be removed for installation. This is a permanent modification. Geissele recommends this procedure be done by a certified and professional gunsmith/armorer.
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