Lindcott Armory Pistol · Proprietary
.50 GI
Guncrafter Industries' big-bore 1911 cartridge, introduced in 2004.
- Caliber
- 0.5″ · 12.7 mm
- Introduced
- 2004
- Case
- Rimless
- Status
- Active
- Introduced
- 2004
- Type
- Pistol
- Origin
- United States
- Inventor
- Alex Arms
- Standard
- Proprietary
- Status
- Active
- Availability
- Rare
- Primer
- Boxer Large Pistol
- Case type
- Rimless
- Max pressure
- 23,000 psi
- Eff. range
- 50 yd
Ballistics
- Parent case
- —
Representative trajectory — modeled from a single velocity input (no published BC for this cartridge yet).
Dimensionscase measurements · scale drawing · size vs familiar rounds
Case dimensions — the scale drawing at the top of the page is built from these.
Wikipedia · verified| Measure | mm | in | ✓ |
|---|---|---|---|
| Bullet ⌀ | 12.70 | 0.500 | ✓ |
| Neck ⌀ | 13.36 | 0.526 | ✓ |
| Shoulder ⌀ | n/a | ||
| Shoulder angle | n/a | ||
| Base ⌀ | 13.36 | 0.526 | ✓ |
| Rim ⌀ | 12.19 | 0.480 | ✓ |
| Belt ⌀ | n/a | ||
| Rim thickness | — | — | |
| Neck length | n/a | ||
| Case length | 22.83 | 0.899 | ✓ |
| Overall length | 31.01 | 1.221 | ✓ |
Size vs familiar rounds
Drawn at true 1:1 — every case is accurate relative to the others. Absolute size depends on your screen's pixel density, so measuring one against a real ruler may be off. .50 GI is highlighted below.
Reloading costestimate cost per round vs factory
Estimate your cost per round and how it compares to factory. Inputs are yours — nothing is stored.
Cost estimate only — not load data. Charge weight is your input; follow published manuals for safe charges.
Firearms chambered in .50 GI
2 models in the database chamber .50 GI. Browse all →
Connected reference
History
Introduced by Guncrafter Industries in 2004, the .50 GI was designed to be the most powerful cartridge that could fit in a standard 1911 frame. It uses a rebated rim the same diameter as the .45 ACP for compatibility with standard 1911 magazines, while the larger .50 caliber bore delivers significantly more energy than the .45 ACP.
FAQs
- What bullet diameter is .50 GI?
- .50 GI uses a 0.5″ (12.7 mm) diameter bullet.
- Is .50 GI still in production?
- .50 GI is active; typical availability is rare.
Sources & provenance
- ManufacturerGuncrafter Industries — Guncrafter Industries — .50 GI Ammunition · grain weights, bullet ⌀archived
- SecondaryNRA / Shooting Illustrated — Guncrafter Industries .50 GI Conversion Kit · bullet ⌀, velocity, grain weightsarchived
Data & sources. Specs compiled from the Lindcott Armory reference; the trajectory is modeled (point-mass), not measured. See methodology. Spotted an error? Report it →