For Spyder MR1 markers, you should select the Raptor Tactical Rifled Barrel and 1 Inch Rear Handguard Cap.
For Spyder MR2 and MR3 markers, you should select the Recon Rifled Barrel and 7/8 Inch Rear Handguard Cap.
Improve your marker distant and accuracy with this rifled barrel kit. The rifled barrel kit is the ultimate realistic upgrade for your marker. It comes with a 16" M4 style barrel and M4 style front sight and handguard (muzzle brake optional). This is a complete kit that is ready to action. Take your game to the next level with this rifled barrel kit.