Orange Mod Works Double Dealer, Recon, Alpha Trooper, Longstrike, Raider, & Deploy Upgrade Spring (5+ Kg) 5kg custom fitted upgrade spring; compatible with: Double Dealer, Recon, Alpha Trooper, Raider, Longstrike, and Deploy. WARNING: Does NOT work for Elite Alpha Trooper, Modulus Recon MK II, or the new Modulus Longstrike. Mod at your own risk! Increasing the spring tension can break or damage stock internal components of your blaster. Some blasters are extremely hard to reassemble, and we won't be able to troubleshoot problems due to user error. Blaster not included.