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Geissele SMR MK4 Rail, 15″, M-LOK


Redesign your AR-15 with this Super Modular Rail!

Only 1 left in stock

We offer free returns! We will accept all returns of items purchased from us with the exception of consumables such as MRE's, chemlights, batteries etc. All new items must be returned undamaged in the original packaging that they arrived in. Clothing that had tags must be returned with tags still attached. Any item that is returned in any condition other than the original condition will be subject to a 20% restocking fee.



This is the Super Modular Rail MK4, M-LOK from Geissele. This rail is 15″ long and made to fit mil-spec upper receivers. This rail features M-LOK  technology for the attachment of compatible accessories. The top of of the is 1913 picatinny rail with the end of the rail having short 1913 picatinny rail sections as well. The rail is made for low profile gas systems and may not work with other type gas systems including gas piston systems. Included is a Geissele low profile Super Gas Block.

Features and Specs: 

  • Geissele
  • SMR MK4
  • Color: Black
  • M-LOK compatible
  • 15 inches long
  • Includes .750″ low profile stainless steel Geissele Super Gas Block
  • Includes installation instructions and tools
  • Made to fit mil-spec M4 type upper receivers, may not work with billet receivers


Additional Info

Additional information

Weight 27 oz

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