The Arisaka Defense Indexer for Geissele SMR 416 in black (Arisaka part no. IDX-G416) is purpose-built to fit the mounting interface on Geissele’s SMR and MK16-pattern handguards, giving shooters running that rail system the same low-profile finger index Arisaka offers on M-LOK and Picatinny platforms. Rather than requiring an adapter, this version attaches straight to the Geissele rail’s native mounting points, keeping the added hardware to a minimum.

Key Specifications

• Built specifically for the Geissele SMR 416 rail mounting interface, with no separate rail adapter required.
• Overall length measures 2.2 inches, keeping the footprint compact on the handguard.
• Functions as a hand stop, giving the support hand a defined forward index point.
• Finished in black to match most Geissele-equipped rifle builds.
• Shares its Indexer product line naming with Arisaka’s M-LOK and Picatinny versions, built for shooters running a Geissele rail specifically.

Frequently Asked Questions

What rail system is this Indexer built for? It is sized specifically for the Geissele SMR 416 mounting interface.

How long is the Indexer? It measures 2.2 inches, keeping the added footprint on the handguard minimal.

Buy the Arisaka Defense Indexer for Geissele SMR 416, Black

Add a purpose-fit index point to your AR foregrip and hand stop lineup from Arisaka Defense. Order it from our Lubbock, Texas gun shop for fast, reliable shipping.