Rock Island Armory 51399 5" M1911 A1 .45 ACP
Updated August 10, 2026
| Lot number | 3058 |
| Estimate | 1.00 - 85.00 USD |
| Auction | BIG Gun'S by TRIGGER SHACK |
| Date | August 16, 2026 at 10:00 AM EDT |
| Auction house | Trigger Shack Llc. |
| Location | Bucks County, Pennsylvania |
Rock Island Armory 51399 – M1911 A1 Standard .45 ACP | 5" Barrel | 8+1 Capacity | Black | Red Dot Optic condition :new in box Manufacturer: Rock Island Armory (Armscor) Model: 51399 Platform: 1911 A1 Standard Caliber: .45 ACP Barrel Length: 5” Capacity: 8+1 rounds Frame/Slide Finish: Black Parkerized Sights: Standard front and rear sights Mounted red dot optic (typically a factory-installed reflex sight) Grips: Checkered synthetic or wood (varies by retailer) Safety: Manual thumb safety + grip safety Action: Single-Action Only (SAO), Semi-Automatic
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