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RSR Stock #: RAFRF00421
Manufacturer Part #: RF00421
UPC: 816903027477

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Radical Firearms, Complete Upper Assembly, 6.5 Grendel, 16" Barrel, 1:9 Twist, Black, MLOK Handguard, BMD Brake


WARNING: This product can expose you to chemicals including Nickel Acetate, which is known to the State of California to cause cancer. For more information visit


"GLOCK” is a federally registered trademark of GLOCK, Inc. and is one of many trademarks owned by GLOCK, Inc. or GLOCK Ges.m.b.H.  Neither RSR Group, Inc. nor this site are affiliated in any manner with, or otherwise endorsed by, GLOCK, Inc. or GLOCK Ges.m.b.H.  The use of “GLOCK” on this page is merely to advertise the sale of GLOCK pistols, parts, or components.  For genuine GLOCK, Inc. and GLOCK Ges.m.b.H. products and parts visit

  • Free float rail system
  • Forged 7075 T6 Aluminum
  • Type III Anodizing

Product Description

The Radical Firearms 6.5 Grendel upper is perfect for the novice or advanced shooter wanting to finish out that build and hit the range. No matter what your style of shooting is, Radical Firearms has you covered.