The new TM-4 Carbine Rifle is an authentic replica of the M4 rifle with very similar external mechanical functions and weight as the M4 firearm. This training rifle provides an authentic training experience with 3 ammo options, less maintenance time, and lower costs than similar training platforms at around 8 cents per round fired. Ammo capabilities of the TM-4 include: .43 caliber rubber balls, dust balls and paintballs. All ammo uses the same magazine. Download the T4E TM4 Training Rifle Information Sheet (PDF) Visit Training For Engagement (T4E) at http://www.t4eguns.com