20″ 5.56 AR-15 Marksman Upper

8 customer reviews


In stock


20″ 5.5.6 AR-15 Marksman Upper

Product Description:

  • Standard Upper Receiver w/ Forward Assist & Dust Cover
  • 17″ Split Top MLOK Rail
  • 20″ 5.56 Barrel
  • Chrome-Moly Lined
  • Rifle length gas system
  • .750 at the shoulder
  • 1/2×28 A2 Flash Hider

Additional information

Weight 6270317096 g

8 reviews for 20″ 5.56 AR-15 Marksman Upper

  1. Charlie2021

    Great so far

    Have yet to mount it, but its clean, unmarred, and sturdy. Love the length! Great craftsmanship

  2. Chris (verified owner)

    Excellent craftsmanship.well built.functions perfect.would definetly buy another.and as always k&m are spot on.good people and products.

  3. Dylan Allen (verified owner)

    Have multiple km tactical uppers have always been happy with products and services own 2 20″ marksman uppers a 16″ & a 7.5″ all came earlier than expected and function perfectly

  4. dpbridgwater (verified owner)

    Great barrel. Well made and a great fit for my build. Just as important, a great price and a quick delivery. Kudos to KM Tactical.

  5. lee (verified owner)

    Great upper shoots straight good company to work with

  6. Clinton James siles (verified owner)

    Bought one of these upper and it runs like a champ

  7. Western Slope Dude

    Well made and runs great! No problem initially swapping out the 16″ upper on a PSA lower with this one. Then I assembled an M&M Firearms lower with a KMTactical LPK for this upper: no issues, perfect fit. I’ve had this upper for several months now, have put well over 300 rounds through it, and I have no complaints. Excellent!

  8. csingleton2360 (verified owner)

    Purchased and went ahead and double checked everything. I can tell whoever that is assembling them, takes their time and does quality work. I did change out the A2 with KM Tactical long 3 prong flash hider w/ outer threads. Upper is mounted on an Aero lower. Matched up great. Have approx. 1k rounds through it and have had no problems shooting suppressed and unsuppressed. I have it paired with a Monstrum Spectre LVPO, and I’m at 1MOA while using m855. For a budget build, I love the feeling of getting premium quality and performance.

Add a review

Your email address will not be published. Required fields are marked *