NOTE: The purpose of this upgrade is to replace the GEN3 style receiver block and beam with the new VICE BLOCK system of Gen4, the INDEX BLOCK will remain as a GEN3 version when you do this upgrade.
 
Gen3 Receiver to Gen4 Vice Upgrade kit.  Choose your variant, 5 inch Hybrid Beam or 10 inch Hybrid Beam.  
 
Allows you to upgrade from your Gen3 Receiver Block to the Geneneration 4 Vice design.  The included Hybrid Beam allows you to use this set on the older Gen3 series Receiver blocks and the new Gen4 Vice blocks.  SPECIAL NOTE: DO NOT USE GEN3 BEAMS in the NEW GEN4 VICE BLOCKS - This will cause damage to the Gen4 Vice block.