Arisaka Defense showed me their new MCX Spear 308 Zero Retention Clamp during the vendor day at last week’s USASOC Sniper Competition.
It’s the big brother to their popular MCX Virtus/Spear LT Zero Retention Clamp which is designed to prevent handguard flax and thereby reduce zero shift for lasers and iron sights that are mounted on the handguard of the MCX Spear.
The Arisaka ZRC consists of two sets of 7075 clamps that mount in the vent slots on either side of the handguard. The inner half of each clamp engages the extended upper receiver.
This new version is designed for the MCX Spear chambered in 277 Fury and .308 while the LT model is for .223, 300 BLK, and 7.62 x 39. You can tell the difference between the two clamps by the number of external lugs: three for the heavy and one for the light.
