Stage 1 Unleashed Performance Kits come packaged with a steel trigger catch, a double strength trigger catch spring, a reinforcement plate, and spring replacements. Stage 2 Unleashed Performance Kits come packaged with a metal alloy bolt sled with a pin, an aluminium breech with an o-ring, an aluminium plunger, and a tube of silicon grease. * Alpha Trooper CS-18 (Stage 1) * Longstrike CS-6 (Stage 1) * Raider CS-35 (Stage 1) * Recon CS-6 (Stage 1 + 2)