The Arisaka Defense MCX Zero Retention Clamp (ZRC) is engineered to significantly reduce zero shift for firearms equipped with handguard-mounted lasers and iron sights. Designed specifically for the MCX Virtus chambered in 5.56 and 300 Blackout, as well as the Spear LT chambered in 5.56, 7.62x39, and 300 Blackout, this part addresses the common issue of handguard flex that can lead to inconsistent zeroing. When the handguard is not firmly secured to the upper receiver, minor pressure can cause the laser or sights to shift by 5 mils or more, and the zero may not return to its original position once pressure is relieved. The ZRC system features exterior clamps that thread into a specially designed U-bracket. The U-bracket engages the extended upper receiver underneath the handguard, providing a secure connection across two axes without contacting the barrel or gas system. This design maintains the free-floated barrel integrity while stabilizing the handguard to prevent zero shift. The clamps are contoured to minimize interference with the user’s grip, ensuring comfortable handling during operation. Built from durable materials and finished in black, the MCX Zero Retention Clamp is an effective upgrade for precision shooting and maintaining zero, especially during dynamic or tactical use. Its installation ensures that your firearm’s sights and lasers stay consistent, reducing the need for frequent re-zeroing and enhancing overall accuracy.
Features:
- Designed for MCX Virtus in 5.56 and 300BLK, and Spear LT in 5.56, 7.62x39, and 300BLK
- Reduces zero shift caused by handguard flex during shooting
- Engages under the handguard with a U-bracket for secure attachment
- Maintains free-floated barrel by avoiding contact with gas system or barrel
- Contoured clamps ensure minimal interference with grip
- Constructed from durable materials with a black finish for longevity
