The Arisaka MCX Zero Retention Clamp LT Standard Handguard for Sig Sauer MCX is a rail cover that fits Sig Sauer MCX.
The Patent Pending Arisaka Zero Retention Clamp (ZRC) greatly reduces zero shift for lasers and iron sights that are mounted on the handguard of the MCX Virtus and Spear LT. This version is designed for the MCX Virtus chambered in 5.56 and 300BLK, and the Spear LT chambered in 5.56, 7.62x39, and 300BLK. The Rattler is not currently supported. The MCX Virtus and Spear LT handguards are not adequately secured to the upper receiver. This allows the handguard to flex significantly, causing a laser or front sight zero to change when minor pressure is applied to the handguard. A shift of 5 mils or more is possible by pushing on the handguard with your support hand while the rifle is shouldered. Additionally, the zero does not always return to it's original position once pressure is removed from the handguard. The Arisaka ZRC consists of exterior clamps that thread into a special U-bracket. The U-bracket engages the extended upper receiver underneath the handguard. This secures the handguard tightly to the upper receiver across two axis, greatly reducing or even eliminating zero shift. The U-bracket does not touch the barrel or gas system, preserving the free-floated barrel. The ZRC clamps are contoured to provide minimal interference with the user's hands while gripping the handguard.
Rail covers protect your hand and your rail, add grip on the handguard and help manage heat from a hot barrel. Check the attachment type (M-LOK or Picatinny) matches your handguard.
How It Compares
Also compare the Indexer Hand Stop for Sig LTAW Handguard, Offset Scout Mount for Sig LTAW Handguard and Hand Stop for Sig LTAW Handguard. Browse all handguards & Rail Sections and the full Arisaka range. New to this? Read our guide: How to Choose an AR-15 Handguard.
Ideal For
- SIG MCX Virtus in 5.56 and 300BLK with the LT standard handguard
- SIG MCX Spear LT in 5.56, 7.62x39 and 300BLK
- Reducing laser or iron sight zero shift caused by handguard flex
- Keeping the barrel free-floated while locking the handguard to the receiver
Key Features
- Fits Sig Sauer MCX LT Spear Handguard
- CNC Machined From 6061-T651 Aluminum
- Mil-A-8625 Type III Hard Coat Anodized
- Made In The USA
- LT Standard Handguard
- Anodized Finish
Compatibility & Fitment
Fits Sig Sauer MCX. Not sure it fits? Contact us before you order and we will check for you.
Technical Specifications
Brand | Arisaka |
Type | Rail Cover |
Model | LT Standard |
Finish | Anodized |
Platform | SIG Sauer |
Color | Black |
MPN | ZRC-SPEAR-LT |
UPC | 850036188575 |
US Shipping & Support
Genuine Arisaka, brand new and covered by the manufacturer's warranty. Shipping is free on US orders of $99 or more, and smaller orders ship from $6.95. Questions about fit, mounting or which option suits your setup? Our team is glad to help before and after your purchase.
Frequently Asked Questions
What does the MCX Zero Retention Clamp LT Standard Handguard fit?
Fits Sig Sauer MCX.
Is this a genuine Arisaka product?
Yes. It is a new, genuine Arisaka product sourced through an authorized US distributor.
How much is shipping?
Shipping is free on US orders of $99 or more. Orders under $99 ship at a flat rate from $6.95 to $9.95, depending on the order total.
