HK MR556 A1 Complete Piston upper Review
This is a review of the HK MR556 A1 Upper with proprietary buffer and spring. This has a piston gas system and cold hammer forged barrel.
See My Website below for more info and extra content not available on YouTube due to policies
Get Decals and stickers here too
Support the FPC in it's battle for our rights! https://www.firearmspolicy.org/
Get My T-Shirt Designs https://teespring.com/stores/tds-ts
Support on Patreon and help me spread freedom think.
Shop Amazon with this link
Use "Code10" For 10% off Olight Products with the link below!
This video is intended for educational purposes only!