The Glock-18 | Gamma Doppler is a Covert pistol skin belonging to The 2021 Train Collection. This is the Phase 4 phase of the finish, distinguished by its specific colourway.

The float range for this finish is restricted to 0.00–0.50, so Factory New, Minimal Wear, Field-Tested, Well-Worn, and Battle-Scarred are the only obtainable conditions on the open market. The restricted range is set by Valve at the time of release.

A Souvenir version is available, dropped exclusively from cases collected during Major Championship matches and stamped with that tournament's stickers. Active listings for Glock-18 | Gamma Doppler are tracked across 17 marketplaces, with prices spanning $62.45 to $966.92 depending on wear, variant, and seller.