The Geissele Maritime Bolt Catch is designed with the warfighter in mind and will work with any lower receiver designed to accept a mil-spec M16/M4 carbine bolt catch. The increased surface area promotes ease of function when locking back the bolt or releasing the bolt after a magazine change. In addition, the extended controls add an increased functionality for left handed shooters who no longer have to break their grip to manipulate the bolt catch. Left handed shooters can easily reach the controls using the index finger of their left hand making magazine changes and locking the bolt back much more fast and efficient.
Aggressive checkering covers the surface of the levers giving the Geissele Maritime Bolt Catch a textured surface that enables positive feedback to the shooters hand when being used with gloves or at night. Manufactured from properly heat treated 8620 steel and manganese phosphate coated, the Geissele Maritime Bolt Catch is intended to serve as an enhanced mil-spec replacement and assist in giving our warfighters overmatch capability with the M16/M4 carbine platform. For complete and current information on this item please see the manufacturer's website.
mil-spec bolt catch spring and plunger are required for assembly and
are NOT included. If the Maritime Bolt Catch is replacing an existing
mil-spec bolt catch, please use care when disassembling the component
from your lower receiver as you will need these parts to install the
Maritime Bolt Catch.
- Heat treated 8620 heat treated steel
- Oversize control surfaces for easy engagement
- Manganese phosphate finish
Compatibility with billet AR-15 lower receivers
is unknown. Please also note that 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, and the hammer pin should only be installed from
the right side of the receiver.
are so confident that you will be 100% satisfied with this product that
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Made in USA
California Proposition 65 Warning: this product contains chemicals
known to the State of California to cause cancer and birth defects or
other reproductive harm. For more information visit