Hi Thomas and welcome. Length of this AR Pistol is 25.3 collapsed and 27.9 inches extended. Cheers, stay safe and enjoy!

Hi Thomas, length is 25.3 collapsed and 27.9 inches extended.
Stay safe & have a great day!

The Radical Firearms 10.5" 300BLK AR Pistol has an overall length that depends on the pistol brace used:
With SBA3 Pistol Stabilizing Brace
The overall length is between 25.3 and 27.9 inches. The AR-556 is similar to this pistol, but with a standard buttstock it would be considered an NFA firearm.
With 10" FCR free float rail system
The pistol has a 10" FCR free float rail system for increased accuracy and room for accessories.
The 10.5" 300BLK AR Pistol has a 10.5" barrel, and other features include:
4140 Chrome Moly Vanadium barrel
Melonite barrel finish
HBAR barrel profile
5/8x24 barrel thread pitch
300BLK chamber
1:8 twist rate
M4 Feed Ramps barrel extension
Pistol Length gas system
.750 Low Profile Gas Block gas block type
A2 Flash Hider muzzle device