The Iver Johnson 1911 A1 is a semi-automatic rifle chambered in .45 ACP, combining the familiar 1911 pistol platform with a rifle-length 16.13-inch barrel and a detachable walnut stock. It weighs 4 lbs and holds 8+1 rounds. 
 

Key Specifications 

• Model: 1911 A1 
• Caliber: .45 ACP 
• Action: Semi-Automatic 
• Capacity: 8 Rounds (plus one in the chamber) 
• Barrel Length: 16.13 inches 
• Weight: 4 lbs. 
• Finish: Walnut/Black 
   

Detailed Features 

• CNC Machined Frame and Slide: Precision-machined for consistent fit and accuracy. 
• Standard GI Sights: Fixed sights compatible with the 1911's traditional sight radius. 
• Manual Thumb Safety & Beavertail Grip Safety: Standard 1911 safety arrangement -- thumb safety and grip safety both require deliberate engagement to fire. 
• Walnut Double Diamond Checkered Grips: Textured for positive grip retention. 
• Detachable Walnut Stock: Adds shoulder support and extends length of pull to 19 inches. Removes for compact storage or use without the stock. 
   

Target Audience 

Shooters who want a .45 ACP rifle platform -- a niche category -- and those who appreciate the 1911 aesthetic in a longer-barreled configuration. Suitable for sport shooting and range use. Also appeals to collectors interested in the 1911 design history. 
 

Usage Scenarios 

• Sport shooting competitions where .45 ACP rifle classes are available. 
• Range use as a shoulder-fired .45 ACP platform. 
• Collecting, given the 1911's historical significance and this rifle's unusual configuration.

Owners of the Iver Johnson 1911 A1 in .45 ACP tend to be drawn to the rifle's classic 1911 aesthetic and the novelty of a shoulder-fired .45 ACP.

The walnut finish and traditional 1911-style design get consistent praise for looks and craftsmanship. Accuracy at the range is generally described as good, and the familiar 1911 controls are comfortable for shooters who already know the platform. Recoil is manageable with the stock attached.

Quality control is the most commonly raised concern. Some users report inconsistent manufacturing that affects performance -- this comes up enough in discussions to be worth noting for buyers. Magazine compatibility and aftermarket parts availability are also mentioned as potential limitations.

Weight -- while the 4 lbs unloaded figure sounds light -- generates mixed reactions in context. With the walnut stock, some users find it heavier and bulkier than expected for extended range sessions.

The overall tone in discussions reflects genuine appreciation for the 1911 heritage and the unusual rifle format, tempered by practical cautions about quality consistency. Most buyers considering this rifle are doing so for its unique character rather than as a pure performance purchase.