MPN: 08-153


  • Increased surface promotes ease of function when locking or releasing the bolt
  • Extended controls allow left handed shooters to manipulate the bolt catch without breaking their grip
  • Compatible with forged Mil-Spec receivers and some billet receivers
  • Aggressive textured surface


  • Material: Heat Treated 8620 Steel
  • Finish: Manganese Phosphate
  • Weight: 0.53 oz.
  • Length: 1.08"
  • Height: 1.13"
  • Width: 0.93"


  • Mil-Spec AR-15 upper and lower

*Compatibility with billet AR-15 lower receivers is unknown.

*The extended controls of the Geissele Maritime Bolt Catch will partially cover the pin hole for the hammer, a smaller punch may be required to push the hammer pin out of the receiver from the left side.


  • 1x Geissele Maritime Bolt Catch
  • 1x Bolt Catch Roll Pin


The Geissele Maritime Bolt Catch was designed for ultimate durability, to be compatible with various weapons, and to offer the tactical features that serious shooters want and need.

Made To Be A Durable Upgrade For Your Dream Build

Manufactured from 8620 steel, heat-treated, then finished with manganese phosphate, the Geissele Maritime Bolt Catch is made to be tough so that you can confidently rely upon it for years to come.

Geissele designed this bolt catch to be congruous with certain billet receivers or Mil-Spec lower receivers compatible with M16/M4 Carbine bolt catches.

Engineered For Improved Handling

Geissele strategically designed their Maritime Bolt Catch to support better handling. By improving handling, you may increase your accuracy.

With a rugged texture and larger surface, you will be able to lock and release the bolt catch more effectively. The texture is a checkered pattern, helping you operate by feel in low light conditions or making a proper grip more attainable when wearing gloves.

Left-handed and ambidextrous shooters benefit from the elongated controls, which allow them to operate the bolt catch while maintaining their grip.

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