Nexus Firearms Enhanced Bolt Complete (CZ Scorpion EVO 3 / 3+)
D2 tool steel bolt assembly that fixes the documented soft-bolt peening and out-of-battery detonation issue on the CZ Scorpion platform
- Price
- $399
- Brand
- Nexus Firearms
- Category
- Bolt Carrier Groups
Featured in
Features
- •D2 tool steel heat-treated to 58 HRC minimum (vs OEM 43 HRC)
- •Nickel Boron coating, ~70 HRC surface hardness
- •17-4 heat-treated internals
- •Complete drop-in bolt assembly
- •Compatible with EVO 3 and Scorpion 3+
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Overview
The Nexus Firearms Enhanced Bolt is a durability and risk-reduction upgrade for the CZ Scorpion platform. Nexus describes the factory bolt as softer material that can peen around the striker-block hole as the hammer rides over the bolt during reset. If that peening forms a burr, it can hold the striker block depressed and increase out-of-battery detonation risk.
Nexus's Enhanced Bolt replaces the factory unit with a D2 tool steel body heat-treated to a minimum of 58 HRC, finished in Nickel Boron coating, and paired with 17-4 heat-treated internal parts. The goal is to resist hammer peening at the striker-block interface and keep the bolt assembly geometry more stable over high round counts.
This is a strong upgrade candidate for Scorpion owners running aftermarket triggers, binary triggers, or high round counts. It is compatible with both the original EVO 3 family and Scorpion 3+ models. Nexus also sells a bolt-only variant for shooters supplying their own internals, while the complete kit is the simpler purchase for most owners.
Key Features
- D2 tool steel heat-treated to 58 HRC minimum
- Nickel Boron coating, ~70 HRC surface hardness
- 17-4 stainless heat-treated internals
- Complete drop-in bolt assembly with all internals
- Compatible with EVO 3 S1, S2, pistol, and Scorpion 3+
- Made in USA
- Bolt-only variant ($249) for shooters supplying internals
Pros
- +Directly addresses striker-block peening risk
- +Strong upgrade for aftermarket-trigger Scorpion builds
- +Compatible with both EVO 3 and Scorpion 3+ (rare in the aftermarket)
- +Drop-in install, no fitting required
- +Pairs with the Nexus delayed-blowback receiver for full conversion
Cons
- −Premium price for a part most shooters do not realize they need
- −Does not change the underlying straight-blowback operating system
- −Bolt-only variant requires donor internals from a factory bolt
- −Lead times on Nexus products can run several weeks
Detailed Specifications
- Material
- D2 tool steel body, 17-4 heat-treated internals
- hardness
- 58 HRC minimum body, ~70 HRC surface (Nickel Boron coating)
- coating
- Nickel Boron
- compatibility
- CZ Scorpion EVO 3 S1, S2, pistol, and Scorpion 3+
- install
- Drop-in
- variants
- Complete ($399, SKU NFCZ-SCP-1-002), Bolt Only ($249)
- msrp
- $399
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Add the Nexus Firearms Enhanced Bolt Complete (CZ Scorpion EVO 3 / 3+) to your build and see how it enhances your platform.