INDEXER FOR GEISSELE SUPER MODULAR RAIL 416

The Arisaka Defense Indexer for Geissele Super Modular Rail 416 is a minimalist finger stop and hand control accessory designed to improve rifle handling and shooting stability on one of the most popular modern AR-15 handguards. Unlike bulky grip pods or elaborate rail-mounted controls, the Indexer takes a low-profile approach: a slim, flat aluminum piece that sits between your index and middle fingers, positioned well forward on the rail where it stays out of the way during transitions to unconventional shooting positions like kneeling or prone.

The real value here is twofold. First, it gives you a solid reference point to pull the rifle consistently into your shoulder and maintain control under recoil—especially useful at distance or during rapid fire. Second, its wider, flat profile doubles as a hand stop and barricade stop, keeping your support hand indexed and preventing your fingers from creeping forward onto a hot barrel or suppressor. It's the kind of small, thoughtful upgrade that experienced shooters appreciate because it solves real problems without adding clutter.

Arisaka machined the Indexer from 6061-T651 aluminum and applied MIL-A-8625 Type III hard coat anodize for durability and corrosion resistance. This version mounts directly to the Geissele Super Modular Rail 416 using two 10-32x3/8" Torx flat head screws; you'll need an IP25 TorxPlus driver for installation. It's made in the USA and reflects Arisaka's philosophy: precise engineering, minimal bulk, maximum function.

Key Features

• Low-profile finger stop for forward handguard placement—stays clear of support hand during transitions to unconventional positions
• Flat, wider profile functions as both hand stop and barricade stop
• Prevents finger slip onto hot barrel or suppressor
• 6061-T651 aluminum, hard coat anodized for durability
• Lightweight—adds minimal weight to your setup
• Made in the USA

Specifications

Frequently Asked Questions

Will this work on other Geissele rails or handguards?

This version is designed specifically for the Geissele Super Modular Rail 416 and uses hardware and geometry tailored to that platform. Arisaka makes Indexer versions for M-LOK and KeyMod rails as separate products, so check compatibility before ordering.

What tool do I need to install it?

You'll need an IP25 TorxPlus driver for installation. The tool is not included with the Indexer.

Is this the same as a typical grip stop or hand stop?

The Arisaka Indexer shares function with hand stops and barricade stops but is intentionally minimal and low-profile. Its slim front-to-back profile and forward placement make it less obtrusive during position changes while still providing a consistent reference point for your firing hand and preventing finger creep.

How much weight does it add?

The Indexer weighs 0.9 oz, so it adds minimal bulk or weight to your handguard setup.