The Bersa WhisperTech B-556X is a full-auto-rated suppressor designed for 5.56-caliber platforms using the Couvillion method for gas management. It features a slim profile intended to integrate within many AR-style handguards and is constructed from 17-4 HH1150 stainless steel. The unit uses a direct-thread 1/2×28 attachment and is presented with a black QPQ/SBN finish.

Key Specifications

• The model is listed as B-556X.
• The caliber is specified as .223 Rem / 5.56 NATO.
• The thread configuration is 1/2×28 for direct-thread attachment.
• The attachment method is Direct Thread.
• The construction material is 17-4 HH1150 stainless steel.
• The external diameter is listed as 1.2 inches.
• The weight is reported as see notes due to conflicting source values.
• The overall length is reported as see notes due to conflicting source values.
• The operational rating is Full-Auto Rated.
• The finish/color is listed as QPQ / Black.

Compact, serviceable, and built from corrosion-resistant stainless steel, the B-556X offers a slim, purpose-driven design for shooters who need a direct-thread 5.56 suppressor that integrates cleanly with AR-platform rifles. Its full-auto rating and MonoCore/Couvillion design aim to balance sound attenuation and durability for range work, training, and precision applications.