Geissele Automatics MK4, Super Modular Rail, 13.5″, Black

Product Description

The Geissele 13.5″ SPR MOD MK4 M-LOK handguard is engineered for AR-15 enthusiasts who demand precision and versatility. This premium rail system combines Geissele’s renowned craftsmanship with practical M-LOK attachment points. Additionally, its 13.5-inch length provides ample real estate for lights, grips, and tactical gear exactly where you need them.

Superior Design and Engineering

Geissele Automatics engineered this Super Modular Rail for durability without compromise. The MK4 features a slim profile that reduces weight while maintaining exceptional strength. Furthermore, the modular design allows future upgrades as your tactical or sporting needs evolve over time.

M-LOK Compatibility and Customization

This handguard accepts any standard M-LOK compatible accessory on the market today. Tool-free mounting means you can attach or adjust gear in seconds without special equipment. Moreover, the black finish provides a professional appearance that matches most AR-15 builds seamlessly.

Whether you’re building a precision sporting rifle or competition carbine, the Geissele 13.5″ SPR MOD MK4 performs flawlessly. Additionally, its reputation for quality makes it a trusted choice among serious operators and recreational shooters alike.

Installation and Requirements

A barrel nut wrench is required for installation but sold separately. In addition, a compatible gas block must be purchased based on your specific build. Western Sport staff can answer all compatibility and installation questions promptly.

Available at Western Sport – Roanoke, TX

Western Sport is a licensed FFL/SOT dealer serving North Texas and the DFW area since 2007. We stock the Geissele 13.5″ SPR MOD MK4 M-LOK in black and maintain competitive pricing on premium components. Contact us at 817-393-4000 for availability, installation guidance, or to place your order.

Why Buy from Western Sport?

• Our team includes experienced AR builders who understand your customization and sporting needs completely.
• We offer competitive pricing on premium Geissele products you can trust for quality.
• Our knowledgeable staff answers installation, compatibility, and M-LOK questions promptly and thoroughly.
• Licensed FFL/SOT dealer since 2007 with fast transfers and reliable shipping throughout North Texas.
• We stand behind every product with dedicated after-sale assistance and lifetime warranty support.

Frequently Asked Questions

Q: Is the Geissele 13.5″ SPR MK4 compatible with my AR-15 upper receiver?

A: Yes, this MK4 works with standard AR-15 uppers using a compatible barrel nut. However, we recommend consulting our staff about your specific upper for proper fitment and installation.

Q: What warranty does Geissele provide on this handguard?

A: Geissele offers a lifetime warranty on manufacturing defects for all their products. Western Sport can assist with warranty claims or technical support questions regarding your rail system.

Q: Do I need special tools to install this M-LOK handguard?

A: A barrel nut wrench is required but sold separately—we stock the Geissele wrench (GEI-02-243). Additionally, a compatible gas block must be purchased separately based on your build specifications.

Q: What M-LOK accessories work with this Geissele handguard?

A: Any standard M-LOK compatible accessory works perfectly with this rail system. This includes lights, grips, slings, and tactical rails from all major manufacturers in the market.

Additional information