The EAA Corp Ultimate MC1911 is a .45 ACP officer-sized 1911 pistol with a 3.4-inch barrel, 6+1 capacity, and a forged aluminum frame with a blued steel slide. The grips are black G10 with an integrated capacity window. Made by Girsan for EAA Corp. 
 

Key Specifications 

• Model: Ultimate MC1911 
• Manufacturer: EAA Corp/Girsan 
• Caliber: .45 ACP 
• Action Type: Single Action Only (SAO) 
• Barrel Length: 3.4 inches 
• Overall Length: 7 inches 
• Capacity: 6+1 rounds 
• Weight: 1.60 lbs 
• Frame Material: Aluminum (Black Finish) 
• Slide Material: Steel (Blued Finish) 
• Grips: Black G10 with Integrated Capacity Window 
• Safety: Ambidextrous safety lever 
• Sights: Dovetail Front / Adjustable Rear 
   

Features 

 
The aluminum frame keeps weight down for a .45 ACP -- at 1.60 lbs it's notably lighter than steel-frame officer 1911s. The blued steel slide has an optic cut for mounting red-dot sights. Extended beavertail grip safety and checkered front strap give a more secure hold during rapid fire. The adjustable rear sight paired with a dovetail front allows precise zero. Trigger pull is specified at 3.5 to 4 lbs, which is appropriate for a carry 1911 -- light enough for accurate shooting without being unsafe.

The MC1911 gets favorable reviews for its compact .45 ACP package, particularly the aluminum frame's weight savings and the G10 grip feel. Feeding reliability across various ammunition types is generally reported as solid, and the trigger gets good marks for smoothness and consistency.

Quality control inconsistency comes up in user feedback -- some owners report minor fit and finish variation between units. The 6+1 capacity is the practical limitation of any officer-sized .45, and buyers who prioritize capacity tend to mention it. Aftermarket parts specific to this model are less available than for a Colt or Springfield 1911, though many standard 1911 components interchange. On balance it's well-regarded as a compact carry 1911 at a competitive price for the platform.