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Description
H&K HK MR556 A4 Gas Block - Complete
Factory HK MR556 A4 adjustable gas block ideal for switching between suppressed and unsuppressed firing.
Compatible With:
- HK MR556 A4
- Nefarious Arms A5 barrels
- NOT compatible with MR556 A1 without converting to an A4 or Nefarious Arms barrel.
Features:
- 1.3mm vent screw
- Genuine H&K factory part
- Complete gas block assembly
- Durable construction for long service life
- Ideal for replacement, upgrade, or custom builds
Warranty Information
12/4/25-BF: Available directly from HK. Cost $159 and MSRP $237.99.
Made from purchased Upper kits from Top Roof.
cost price was $230 our cost now $159-1/28/26-BM
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Additional Information
Firearm Model: |
HK MR556 |
Origin: |
Germany |
Color: |
Black |
Caliber: |
5.56 / .223 |
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