Thompson 1927A-1 Lightweight Deluxe .45 ACP, 10.5in, 100rd
About this product
The Thompson 1927A-1 Lightweight Deluxe .45 ACP is a semi-automatic pistol built to the legal minimum barrel length for Title II classification without NFA paperwork, pairing a 10.5-inch finned barrel with an aluminum receiver and a 100-round drum magazine to create a modernized, range-legal interpretation of the classic submachine gun. It is a direct homage to the 1927 Commercial Thompson, engineered to avoid the National Firearms Act's Short-Barreled Rifle (SBR) classification by maintaining a pistol configuration. This specific model from Ironclad Armory achieves a significant weight reduction—approximately 5.9 pounds (93.9 oz)—via its aluminum construction while retaining the iconic silhouette with genuine American walnut furniture.
What is the Thompson 1927A-1 Lightweight Deluxe used for?
This firearm is designed for disciplined, stationary range shooting and display; it is not a practical defensive tool. The 100-round drum magazine encourages high-volume plinking in controlled environments, making it ideal for collectors and enthusiasts who want to experience the tactile operation of a classic design without the cost or regulatory burden of a transferable machine gun. The 10.5-inch barrel optimizes .45 ACP ballistics for the range while keeping the overall configuration legally a pistol, avoiding the need for a $200 tax stamp and ATF Form 1.
How does the Thompson 1927A-1 compare to the Auto-Ordnance 1927A-1 Deluxe?
The Ironclad Armory model is approximately 2.1 pounds lighter than the all-steel Auto-Ordnance 1927A-1 Deluxe, making it markedly easier to handle for extended range sessions. Where the Auto-Ordnance excels in replicating the original's heft and material authenticity, the Ironclad Armory variant is better for practical shooting due to its reduced weight; however, this comes at the cost of some perceived historical solidity and a higher price point of $1,756.99 versus the Auto-Ordnance's typical $1,450 street price.
What does it weigh and what are the dimensions?
The pistol weighs 93.9 ounces (5.9 pounds) and has an overall length of 23.5 inches with the 10.5-inch barrel installed. The aluminum receiver accounts for the significant weight savings, measuring 1.5 inches in width at the ejection port. The 100-round drum magazine adds another 4.2 pounds when fully loaded, bringing the total ready-to-fire weight to just over 10 pounds.
Who is this NOT for?
This is not for a first-time shooter, anyone seeking a concealed carry or home-defense pistol, or a buyer on a tight budget. The high capacity, substantial weight when loaded, and specific manual of arms require significant familiarity with firearms safety and operation. For a more conventional and affordable first centerfire pistol, consider the Stevens 334 in .243 Win as a bolt-action alternative.
What's in the box?
You receive the pistol with one installed 100-round drum magazine, a basic cable lock, a soft-sided zippered case, and a single-page owner's manual covering disassembly and safety. Ironclad Armory does not include spare parts, cleaning kits, or additional smaller-capacity magazines. The drum magazine requires a specific loading tool, which is not included and must be purchased separately for approximately $25.
Is the Thompson 1927A-1 Lightweight Deluxe worth it at $1,756.99?
At this price, it is worth it only for the specific collector or enthusiast who values the unique combination of historical styling, modern lightweight materials, and high-capacity range fun. You are paying a premium for the aluminum construction and the included drum magazine over more traditional all-steel replicas. For a buyer more interested in classic shotgun sporting, the investment might be better directed toward a Stevens 555 Sporting O/U 12 Gauge.
Specs at a glance
Video review
Pros & cons
What works
- Weighs 93.9 oz (5.9 lbs) — 33.6 oz lighter than the all-steel Auto-Ordnance 1927A-1 Deluxe
- Includes a 100-round drum magazine — holds over three times the capacity of a standard 30-round stick magazine
- 10.5-inch barrel — maximizes .45 ACP velocity while maintaining legal pistol classification
- American walnut furniture — provides authentic period-correct aesthetics and grip
Trade-offs
- No included drum magazine loading tool — adds a $25-40 mandatory accessory purchase
- Fixed, non-adjustable iron sights — limits precision beyond 50 yards without gunsmith modification
- Aluminum receiver is softer than steel — more susceptible to finish wear and handling marks over time
- High ready-to-fire weight — exceeds 10 pounds with a fully loaded drum, fatiguing for extended offhand shooting
Expert review
Key attributes
| upc | 602686292085 |
| manufacturer | Kahr Arms |
| manufacturer part number | TA5100D |
| action | Semi-Auto |
| barrel finish | Black |
| barrel length | 10.5" |
| caliber/gauge | .45 ACP |
| capacity | 100 |
| product type | Tactical |
| safety | Manual |
| shipping weight | 21.6 |
| sights | Blade Front/Fixed Battle Rear |
| units per box | 1 |
Frequently asked questions
- Is the 100-round drum magazine removable?
- Yes, the 100-round drum magazine is fully removable using the magazine release located just ahead of the trigger guard. It is a dedicated unit for this model and is not cross-compatible with original WWII-era Thompsons or other semi-auto variants without modification. Loading it to full capacity takes approximately 4-5 minutes with the proper tool.
- Does this firearm accept standard .45 ACP ammunition?
- Yes, it chambers and fires standard pressure .45 ACP (Automatic Colt Pistol) rounds with a cartridge overall length of 1.260 to 1.275 inches. I recommend against using +P or +P+ ammunition, as the aluminum receiver and specific bolt design are engineered for standard pressure loads, which generate approximately 21,000 PSI.
- Can I attach a vertical foregrip to this pistol?
- No, attaching a vertical foregrip to a pistol with an overall length under 26 inches would legally reclassify it as an Any Other Weapon (AOW) under the NFA, requiring a separate $200 tax stamp. The overall length of this model is 23.5 inches, so adding a vertical grip is not legal without first registering it as an AOW.
- How long does shipping to an FFL take?
- For in-stock items, Ironclad Armory processes and ships within 3-5 business days via UPS or FedEx with adult signature required. Transit time to your local Federal Firearms License (FFL) holder typically adds 2-7 business days depending on your location. You must coordinate the transfer directly with your chosen FFL dealer.
- Is the iron sight adjustable?
- No, the blade front sight and fixed-notch rear sight are not adjustable for windage or elevation. The sight radius is 16.5 inches. For precision shooting, you would need to have a gunsmith install an aftermarket optic mount, as the receiver is not drilled and tapped from the factory.