Practical, replica style CO2 rifle aimed at target shooting and plinking. The Swiss Arms M4 Saturn runs on 12 g CO2 capsules and feeds from a removable 18 round magazine for quick follow up shots. It fires 4.5 mm steel BBs so expect lively ricochets off hard surfaces and a need for a solid backstop and eye protection. Performance is best treated as recreational, with velocities in the region of 119 m/s and muzzle energy under 4 joules. Realistic M4 styling, modest weight and simple CO2 operation make it an easy to use option for backyard practice and casual target sessions. Factor ongoing CO2 and BB costs into ownership and double check magazine and spare parts availability with your supplier.