20" 6.5 Grendel Complete Upper

Your Price: $709.95
Out of Stock.
Part Number:MA-65G-RECON-20-UPPER

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Add a BCG
Add a Charging Handle
This complete upper includes our new slimline Handguard! The Slimline of handguards was designed with size and weight in mind, providing the user with multiple picatinny mounting options. The perfect addition to your lightweight build. Our proprietary barrel nut and retention system is a durable and dependable mounting platform, maintaining a slim profile while still providing the strength and stability customers have grown to love from MA Defense.



  • MA Assembled Billet Upper Receiver
  • 15” Slimline handguard
  • 20" 6.5 Grendel CMV Barrel
  • Low Profile Gas Block and Rifle-Length Gas Tube
  • MA Single Port Compensator
  • Product comes assembled

This complete upper does not include BCG or Charging Handle. These products may be selected as add-ons under the FINISH YOUR BUILD tab

The muzzle device that comes with this complete upper receiver is NOT pinned nor welded to this barrel.


MA Upper Receiver Features:

  • Precision machined to correct Mil-Specs from 7075 T6 billet aluminum
  • Machined for use with barrels that use an M4 barrel extension
  • M4 Feedramps
  • Hard- coat anodized per Mil-A-8625F Type III Class II in a matte black finish
  • Ejection port door and forward assist installed

Handguard Features:

  • 15” Slimline
  • Front and rear picatinny rail
  • Eliminated center of top rail for weight reduction
  • Compatible with low profile gas blocks
  • 1.3” Inside diameter
  • 1.5” Outside diameter
  • Weight is 13.2 oz. without barrel nut
  • Compatible with mil-spec AR15 upper receivers and barrels


20" 6.5 Grendel Barrel Features:

  • Length: 20"
  • Twist: 1:8 5R
  • Straight Flutes
  • Muzzle: 5/8 x 24 Threaded
  • Material: 4150 CrMoV Steel (Chrome Moly Vanadium per MIL-B-11595E)
  • Finish: QPQ corrosion resistant finish both inside and out
  • Gas Block: .750
  • Gas Port: 0.78”
  • Gas System Length: Rifle Length
  • Weight: 29oz
  • M4 Barrel Extension with .300BO feedramps
  • HPI and MPI Tested

All of our uppers have had 3 rounds fired through them. They will come with some slight marks on the BCG and charging handle, rest assured all parts are new. We do this for several reasons, 1) to make sure the upper passes our function test, 2) see number one. The upper will not be cleaned after the 3 rounds.

*Lifetime Guarantee covers manufacturing defects in materials and workmanship, regardless of the age of the product, but it does not cover normal wear and tear. Wear and tear is damage that naturally and inevitably occurs as a result of normal use.

The use of reloaded or remanufactured ammunition will void the warranty, due to the unpredictability of the standards (SAMMI/NATO) adhered to, since reloads of poor quality ammunition may not meet (SAMMI/NATO) specifications, may exceed limits, and therefore may be unsafe.

ITAR: International Traffic in Arms Regulations Controlled

5 Stars
I have been dealing with Don/ ModernArmory for most of my AR needs.. Do to the fact great customer service, fast shipping and especially since he has come out with his own line of uppers.. The 5.56 complete upper with the nomad handguard, is definitely a BEAST,!! And would recommend also getting his BCG and ch to go with it. Can't go wrong with the warranty he offers.... Now the 6.5 Grendal, with his Slimline handguard, complete upper.. well all I can say is, YOU WILL NOT BE DISAPPOINTED!! it's light weight, very durable, with a slick design and look to it.. All I have ever seen is the pride and joy this man puts into his uppers he sends out..!! Thanks Don You have my five ?? rating!!
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Reviewed by:  from Ossian. on 9/20/2019

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