The Alpha Foxtrot AF1911 Romulus in the compact configuration runs a 3.5-inch threaded barrel in 9mm Luger with a black DLC finish. It is optic-ready and shares the dual-capacity magazine design of the full-size Romulus, accepting 17-round or 20-round magazines. The threaded barrel makes it compatible with standard suppressor mounts. 
 

Key Specifications 

• Brand: Alpha Foxtrot 
• Model: AF1911 Romulus 
• Caliber: 9mm Luger 
• Action: Semi Auto 
• Barrel Length: 3.5 in 
• Capacity: 17+1 / 20+1 
• Color/Finish: Black DLC 
   

Detailed Features 

• 3.5-inch threaded barrel in DLC coating 
• Optic-ready slide (MOS-style cut) for direct optic mounting 
• Compensated barrel variant (Comp TB designation in titles) 
• Dual-capacity compatibility: 17-round and 20-round magazines 
• 1911-pattern compact platform with black DLC finish throughout

Owners who pick up the compact Romulus specifically for the threaded barrel tend to be satisfied with how cleanly it was machined and how it fits standard mounts. The DLC coating on the 3.5-inch version gets the same durability comments as on the 5-inch, which is consistent with the finish being applied the same way across the line.

The short barrel changes the feel compared to a full-size 1911, and opinions split on whether the recoil impulse is still manageable. Most owners adapt quickly; a few find the compact frame less comfortable for extended range sessions than the full-size Romulus.

The compensator-threaded-barrel setup appeals to people looking for a compact carry pistol that can serve double duty at the range with a suppressor. The optic cut adds to that versatility, though some note that a dot on a 3.5-inch pistol is more niche than on a longer gun.