The Colt M4 Pistol is a 5.56 NATO AR-pattern semi-automatic firearm with an 11.5-inch barrel and a pistol brace. It has a 30+1 capacity and an M-LOK handguard with a Picatinny rail on the receiver. The barrel has a black phosphate finish and the receiver is matte black. 
 

Key Specifications 

• Brand: Colt 
• Model: M4 (M4P6933) 
• Caliber: 5.56 NATO 
• Action: Semi Auto 
• Barrel Length: 11.5 in 
• Capacity: 30+1 
• Color/Finish: Matte Black / Black Phosphate 
   

Detailed Features 

• 11.5-inch barrel in a pistol configuration with brace; this is not a rifle and does not require a tax stamp 
• M-LOK handguard for accessory attachment 
• Picatinny rail on receiver for optic mounting 
• Black phosphate barrel finish 
• Synthetic stock with matte black receiver

Owners of the Colt M4 Pistol appreciate the short 11.5-inch configuration for its maneuverability in tight spaces while retaining the familiar AR-pattern controls. The M-LOK handguard is consistently praised for giving a clean, versatile platform to attach lights or grips without extra adapters. Colt's fit and finish reputation carries weight for buyers who want a known quantity over newer budget AR pistols.

The brace gets mixed commentary. Shooters who planned to use it as a pistol from the start are satisfied, but those who hoped to eventually configure it differently note the regulatory landscape around braces is worth researching before purchase. The 30-round magazine and 5.56 NATO chambering are straightforward positives that rarely draw complaints.

On value, the Colt premium is a recurring theme. Buyers find the M4 Pistol priced above comparable AR pistols from other manufacturers, and opinions divide between those who consider the Colt name worth the difference and those who view it as paying for a logo on a mil-spec parts kit. Trigger feel is described as standard mil-spec, which satisfies some and prompts an upgrade purchase for others.