Micro Roni Gen 4 from CAA replica for a pistol carbine conversion kit. Increasing effective range, the Micro Roni also improves control and gives you a totally new and much more effective weapon platform. As a result of the aluminum and polymer body, the platform for your various Glock is sturdy and stable. The Micro Roni for G17/19/19X/22/23/31/45 features a folding stock for a steady grip.