Rainier Arms

Rainier Arms: gas blocks, tools, and spare parts for AR-15 and Glock

At Planet Shooters, you will find Rainier Arms low-profile gas blocks in .750 in black and silver, the Taper Pin Gas Block Tool for taper pin-fixed gas blocks, the Modified Trigger Guard, and the MARS (Magazine Advanced Release System) for Glock Gen 4 and Gen 5.

How to choose

  • Diameter: .750 gas blocks are for barrels with a .750" diameter at the gas block position.
  • Glock: the MARS release is indicated for Glock Gen 4 and Gen 5.

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Rainier Arms – Planet Shooters collection

1 product

How to choose Rainier Arms products

charging handle, gas block, controls, tools, and trigger components. Technical specifications and features may vary depending on the chosen version. Before purchasing, compare the model, measurements, caliber, attachment, and compatibility indicated in each product sheet.

Compatibility, availability, and use

Products intended for the maintenance and configuration of compatible firearms, to be used following the manufacturer's instructions, correct safety procedures, and applicable regulations. The updated availability is shown in the product grid.

How to verify the correct Rainier Arms product?

Check the exact code, platform, or model and consider only those items for which the product sheet explicitly states the required correspondence as compatible. If in doubt, contact Planet Shooters before ordering.