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Caliber: 5.56x45MM
Capacity: 30 + 1
Upper Rec. Material: 7075-T6 Aluminum
Upper Rec. Finish: Black Hardcoat Anodized
Lower Rec. Material: 7075-T6 Aluminum
Lower Rec. Finish: Black Hardcoat Anodized
Barrel Material: 4150 CMV
Barrel Finish: Manganese Phosphate
Barrel Technical: 1:7RH, 6 Groove
Barrel Length: 16.1 in.
Overall Length: 33-36.5 in. (81-90cm)
Front Sight: A2 Fixed Front Sight 
Rear Sight: Magpul® MBUS® Rear Sight
Fire Mode: Semi-Automatic
Trigger Type: Single Stage
Grip: Magpul® MOE® SL™ Pistol Grip
Unloaded Weight: 6.95 lbs (3.15 kg)
Safeties: Safety Selector
Operating System: Direct Gas Impingement
Included Accessories: 30rd Magpul® PMAG® Magazine and Vertical Grip, Manual, Cable Lock

• The Colt M4 Expanse™ Magpul® Series is the newest member of the Expanse family
• A2 Front Sight and Flat Top Upper Receiver are ready for the addition of Optical Sights or Accessories
• Includes Black Magpul® MOE® SL™ Handguard, Buttstock, Pistol Grip