[WTS/WTT] Brand new HK MR556 A1 Complete Upper. Can sell parts individually; Used MR556 A4 mlok slim rail

SpoilerComplete

Timestamp: https://imgur.com/a/yq5UuUU

New A1 upper, never shot with.

Price for individual parts:

    ⁃    Complete Barrel assembly (barrel, barrel nut, gas block, piston and rod, FH): $575     ⁃    BCG: $450     ⁃    Upper (includes port door, forward assist, piston guide): $345     ⁃    A1 MLOK rail + charging handle: $125     ⁃    Buying the whole upper: $1250 OBO (I will also throw in an HK heavy buffer and spring for free).

Also have a used MR556 A4 slim MLOK rail: $175. This rail had seen about 200 rounds. It has the cutout for adjustable gas block.

All the prices above include shipping and full insurance. I can take PayPal Friends & Family or Venmo. Dibs rule applies.

Open to trade with Eotech, Aimpoint or other optics. Please feel free to PM me and discuss. Thanks!

Posted Jul 6, 2025, 8:52 PM UTC

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