Nexus Evo Gen 2 Roller Delayed Receiver (CZ Scorpion EVO 3 / 3+)

Nexus Firearms' Evo Gen 2 receiver replaces the factory polymer Scorpion receiver with a billet aluminum unit that converts the action from straight blowback to ball-bearing delayed blowback. This is the only aftermarket conversion of its kind for the CZ Scorpion platform and the most consequential structural change available for the gun.

The mechanical benefit beyond recoil reduction is the elimination of bolt bounce and the over-travel conditions that drive the platform's documented out-of-battery detonation issue. On a straight-blowback Scorpion, fast aftermarket triggers and binary triggers can outrun bolt speed, the hammer follows the bolt down during reset and peens the soft factory bolt around the striker block hole, and over enough rounds the in-battery safety stops working. The delayed-blowback conversion removes the timing condition that creates the wear in the first place. Paired with the Nexus Enhanced Bolt, recoil drops by as much as 35% and bolt bounce is minimized to the point that suppressed shooting becomes far more pleasant.

The receiver is full OEM parts compatible and is a drop-in replacement for both EVO 3 and Scorpion 3+ receivers. The factory upper, barrel, handguard, and fire control all transfer over. This is an FFL transfer item if it ships as a serialized receiver depending on your local regulations; verify with the dealer before ordering. The price is $350 standalone, and Nexus also sells a complete bearing-delayed pistol with this receiver pre-installed for shooters who want a turnkey configuration.