The Rock Island M1911-A1 GI .45 ACP Full Size (51421) pays tribute to the classic military 1911, offering rugged reliability and timeless styling. Built with a forged 4140 steel frame and slide, this pistol uses Series 70-style internals and a 5-inch barrel for consistent accuracy and dependable performance.
Finished in a matte parkerized coating, the GI delivers corrosion resistance and an authentic service-grade appearance. The smooth wood grips give it a traditional feel, while the GI-style fixed sights stay true to the original spec.
This pistol is chambered in .45 ACP, making it an ideal choice for those seeking the proven stopping power of the original service cartridge. It comes standard with a 7-round magazine and retains the original control layout, including the manual thumb safety and grip safety.
Key Features:
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Caliber: .45 ACP
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Capacity: 7+1
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Barrel Length: 5″
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Frame/Slide Material: Forged 4140 steel
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Finish: Parkerized
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Grips: Smooth wood
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Sights: GI-style fixed
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Trigger: Series 70
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Safety: Manual thumb safety, grip safety
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Part Number: 51421
Manufacturer Specs:
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Overall Length: 8.5″
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Height: 5.5″
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Width: 1.3″
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Weight: Approx. 2.47 lbs (unloaded)
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Twist Rate: 1:16
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Grooves: 6
Frequently Asked Questions:
Q: Is this a modern or traditional 1911?
A: This model is built to GI military specifications, mimicking the classic design of early U.S. service pistols.
Q: What kind of finish does it have?
A: The frame and slide feature a matte parkerized finish for durability and authenticity.
Q: Is the trigger Series 70 or Series 80?
A: It features a Series 70-style fire control system, with no firing pin block.
Q: What’s the magazine capacity?
A: This pistol comes with a 7-round magazine, standard for GI-style 1911s.
Brought to you by Black Bayou Armory.
