– 0.1mm X 2
– 0.15mm X 2
– 1.45mm X 1
– 1.85mm X 1
– Eliminate gap between rail and upper receiver
– Precisely aligns fastening screws on RIS systems
– Ensures stability
– Prevents RIS from angling during installation
Professional installation is recommended. Improper use or installation of upgrade parts are 99% of the time the cause of failures of these items.
Please thoroughly inspect any parts for defects before attempting installation. Due to the high possibility of damage from improper installation, we will not warranty parts after attempting installation.