
Availability: In Stock
Current Stock: Out of stock
The TacFire MAR103 is a compact 5-inch Picatinny rail with KeyMod mounting slots, engineered for shooters building lightweight, modular AR platforms or updating existing setups. Whether you're running a pistol-length handguard, securing accessories on a slim rail system, or consolidating your mounting real estate, this rail gives you 11 slots of flexible attachment points in a footprint that doesn't bloat your build. It's the kind of no-nonsense component that lets you dial in your rifle without compromise.
KeyMod technology remains popular across the tactical and hunting rifle community for its clean lines and solid mechanical lock—no wobble, no guesswork. The integrated Picatinny sections mean you can mount optics, lights, grips, or specialty accessories on the same rail without adapters. At 5 inches, it's short enough to pair with midlength or pistol-length handguards, yet offers enough surface to accommodate your core setup without forcing you into oversized or unwieldy geometry.
TacFire parts occupy a practical middle ground: genuine functionality at street-level pricing, without the boutique markup. This rail is favored by budget-conscious builders, second-rifle enthusiasts, and shooters who prioritize modular configurability over brand prestige. If you're assembling a truck gun, a training upper, or a specialized hunting rifle where weight and profile matter, a compact KeyMod rail like this one pays dividends.
| Length | 5 inches |
| Mount Type | KeyMod |
| Picatinny Slots | 11 |
| Brand | TacFire |
| Finish | Black |
The TacFire MAR103 is a KeyMod rail; it mounts to any handguard or upper receiver featuring KeyMod slots. KeyMod is a standardized system used across many AR variants and aftermarket handguards. Verify your current handguard supports KeyMod before ordering.
Yes. The rail includes integrated Picatinny sections, so you can mount standard Picatinny-pattern optics, riser mounts, or sight bases directly without additional adapters.
Yes. At 5 inches, this rail is designed for shorter handguards and builds where profile and weight are priorities. It's commonly used on midlength and pistol-length uppers.
KeyMod-compatible accessories include tactical grips, light mounts, sling adapters, rail panels, and specialty fixtures. The 11 slots give you room to configure your ideal layout without overloading the rail.

SKU: 115851449 • Width: 2.6in • Height: 0.7in • Depth: 6in • Weight: 0.12oz





Availability: In Stock
Current Stock: Out of stock
The TacFire MAR103 is a compact 5-inch Picatinny rail with KeyMod mounting slots, engineered for shooters building lightweight, modular AR platforms or updating existing setups. Whether you're running a pistol-length handguard, securing accessories on a slim rail system, or consolidating your mounting real estate, this rail gives you 11 slots of flexible attachment points in a footprint that doesn't bloat your build. It's the kind of no-nonsense component that lets you dial in your rifle without compromise.
KeyMod technology remains popular across the tactical and hunting rifle community for its clean lines and solid mechanical lock—no wobble, no guesswork. The integrated Picatinny sections mean you can mount optics, lights, grips, or specialty accessories on the same rail without adapters. At 5 inches, it's short enough to pair with midlength or pistol-length handguards, yet offers enough surface to accommodate your core setup without forcing you into oversized or unwieldy geometry.
TacFire parts occupy a practical middle ground: genuine functionality at street-level pricing, without the boutique markup. This rail is favored by budget-conscious builders, second-rifle enthusiasts, and shooters who prioritize modular configurability over brand prestige. If you're assembling a truck gun, a training upper, or a specialized hunting rifle where weight and profile matter, a compact KeyMod rail like this one pays dividends.
| Length | 5 inches |
| Mount Type | KeyMod |
| Picatinny Slots | 11 |
| Brand | TacFire |
| Finish | Black |
The TacFire MAR103 is a KeyMod rail; it mounts to any handguard or upper receiver featuring KeyMod slots. KeyMod is a standardized system used across many AR variants and aftermarket handguards. Verify your current handguard supports KeyMod before ordering.
Yes. The rail includes integrated Picatinny sections, so you can mount standard Picatinny-pattern optics, riser mounts, or sight bases directly without additional adapters.
Yes. At 5 inches, this rail is designed for shorter handguards and builds where profile and weight are priorities. It's commonly used on midlength and pistol-length uppers.
KeyMod-compatible accessories include tactical grips, light mounts, sling adapters, rail panels, and specialty fixtures. The 11 slots give you room to configure your ideal layout without overloading the rail.
SKU: 115851449 • Width: 2.6in • Height: 0.7in • Depth: 6in • Weight: 0.12oz
