.625" Low profile gas block, includes installation screws. Made of 4140 moly chrome. Replace your A2 site with this gas block or add a free float rail system to cover your gas block.
Specifications:

Type	Gas Block
Model	Low Profile
Dimensions
Size	.625"
Material	4141 Chrome Moly Steel
Action
Trigger
Safety
Thread Pattern
Finish	Black
Bolt Type
Hand
Hammer Type
Max Capacity