SIG SPEAR
Small Arms

SIG SPEAR

.277 Fury (6.8×51mm) · Short-stroke gas piston · In-house at TTM

The TTM SIG SPEAR is a next-generation battle rifle / carbine built around the .277 Fury (6.8×51mm) cartridge. Led by Yoni, the program focuses on high-pressure receiver architecture, controlled recoil, and repeatable manufacturing tolerances across production runs.

From cold-hammer-forged barrels to QD suppressor interfaces, every critical component is designed, machined, and validated at our headquarters - with full traceability from raw stock to finished weapon.

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Interactive

Explore the platform in 3D

The full SPEAR assembly from our CAD, compressed for the web. Loads only when you ask for it - about 6 MB.

SIG SPEAR
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Gallery

Platform imagery

SIG SPEAR profile
SIG SPEAR detail
SIG SPEAR on bench
SIG SPEAR upper receiver
Platform dossier

SPEAR readout

Sticky platform view with scrolling engineering data - pressure, feed, and manufacturing discipline.

SIG SPEAR

TTM · SIG SPEAR · .277 Fury / 6.8×51

Technical specifications

  • Cartridge.277 Fury (6.8×51mm)
  • ActionShort-stroke gas piston · rotating bolt
  • Barrel13″ cold-hammer forged
  • Overall~36″ with suppressor · folding stock
  • Weight8.4 lb unloaded · ~9.8 lb w/ suppressor
  • MagazinesSR-25 pattern · 20 / 25 rd
  • Velocity~915 m/s
  • Rate of fireSelect-fire · cyclic unpublished
  • Range600–800+ m
  • SuppressorSLX QD ready

High-pressure architecture

The .277 Fury hybrid-case cartridge runs significantly higher chamber pressures than legacy 5.56×45 or 7.62×51 NATO loads - requiring reinforced receiver geometry and barrel metallurgy validated through sustained fire testing.

Manufacturing

Each rifle is serialized and tracked from raw material to final assembly. CNC programming, dimensional inspection, and functional validation occur at every production stage before a weapon leaves our facility.

Program lead: Yoni, Lead Engineer

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