Small, or smaller?
Both come from the RONI family, both drop onto your pistol without tools, and both turn it into a stable, shoulder-supported platform. The difference is how much kit you want around your gun.
The Short Answer
- Nano RONI: the most compact RONI, with an auto-opening stock that snaps from carry to ready. Built around full-size and compact Glocks.
- Micro RONI Gen 4X: more rail space and wider fit, including CZ, Beretta APX and Gen 6 Glock.
Side by Side
| Micro RONI Gen 4X | Nano RONI | |
|---|---|---|
| Glock 17, 19, 19X, 22, 23, 31, 32, 45 | ✓ | ✓ |
| Glock 26, 27 | ✓ | – |
| Glock Gen 6 | ✓ | – |
| CZ P07, P09, P10 and Beretta APX | ✓ | – |
| Stock | Folding stock, brace or telescopic (by pistol) | Auto-opening stock |
| Rails | Extended top rail plus two side rails | Picatinny rail, red dot ready |
| Suppressor and compensator | Plus muzzle accessories | Compatible |
| Kit levels | Kit only, Basic, Advanced, PRO | Naked, Basic, Advanced, PRO |
Who Should Get Which
If size and quick deployment matter most, the Nano is the one. If you want room for a red dot plus a magnifier, side rails for a light and thumb rests, or you shoot a CZ or APX, go Micro RONI.

Still on the fence? Build a Micro RONI for your pistol and see exactly what comes with each level.
Quick legal note: check your local rules before you pick a stock. In the US, a shoulder stock on a pistol may require NFA/SBR registration.