• SERO GM6 Lynx .50 BMG Semi-Automatic Bullpup Rifle
  • SERO GM6 Lynx .50 BMG Semi-Automatic Bullpup Rifle
  • SERO GM6 Lynx .50 BMG Semi-Automatic Bullpup Rifle
  • SERO GM6 Lynx .50 BMG Semi-Automatic Bullpup Rifle
  • SERO GM6 Lynx .50 BMG Semi-Automatic Bullpup Rifle
  • SERO GM6 Lynx .50 BMG Semi-Automatic Bullpup Rifle
  • SERO GM6 Lynx .50 BMG Semi-Automatic Bullpup Rifle
  • SERO GM6 Lynx .50 BMG Semi-Automatic Bullpup Rifle
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B&B Firearms

SERO GM6 Lynx .50 BMG Semi-Automatic Bullpup Rifle

$15,999.00
$15,999.00
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Why buy from B&B

Because you work directly with a family-run business that cares about getting it right.

B&B Firearms is built on faith, family, service, and real product knowledge. When you buy here, you are not supporting a giant corporation — you are working with a veteran-owned family business that values honesty, guidance, and doing right by people.

The SERO GM6 Lynx is one of the most distinctive .50 caliber rifles in the world, combining semi-automatic firepower, a compact bullpup layout, and a proprietary recoil-reduction operating system in a portable anti-material rifle platform.

Built for serious collectors, qualified buyers, and extreme long-range rifle enthusiasts, the GM6 Lynx delivers the power of .50 BMG in a package far shorter than traditional .50 caliber rifles. The rifle’s barrel can be carried in a shortened portable configuration and rapidly deployed into firing position, giving the GM6 Lynx a unique combination of portability, speed, and heavy-caliber performance.

Unlike many large-frame .50 caliber rifles, the GM6 Lynx uses a long-recoil barrel system designed to significantly reduce felt recoil and improve control for faster follow-up shots. According to the product catalog, the rifle is capable of sub-MOA accuracy, has an effective shooting range of 2,187+ yards, and is designed around a straight 5-round magazine.

The GM6 Lynx is purpose-built for those who want something rare, compact, powerful, and unlike anything else in the .50 BMG rifle market.

Key Features

  • Semi-automatic .50 BMG bullpup rifle
  • Manufactured by SERO International
  • Compact carry configuration with rapid deployment
  • Proprietary recoil-reduction barrel system
  • Designed for portability compared to traditional .50 caliber rifles
  • Straight 5-round magazine
  • Catalog-listed sub-MOA accuracy
  • Catalog-listed effective range of 2,187+ yards
  • Chambered for 12.7×99mm NATO / .50 BMG
  • Barrel and magazine conversion capability for 12.7×108mm Russian, where legally available and properly configured

Specifications — Converted to Imperial

Spec Metric Measurement Imperial Conversion
Empty Weight 10.5 kg 23.1 lb
Combat Weight 13 kg 28.7 lb
Full Combat Length 1,114 mm 43.9 in
Portable Carry Length 914 mm 36.0 in
Barrel Length 730 mm 28.7 in
Muzzle Energy 14.5 kJ Approx. 10,694 ft-lb
Muzzle Velocity 780 m/s Approx. 2,559 fps
Effective Range 2,000 m+ 2,187 yd+ / 1.24 mi+
100 m Test Distance 100 m 109 yd
1,600 m Demonstration Hit 1,600 m 1,750 yd / 0.99 mi
Magazine 5 rounds 5 rounds
Accuracy <1 MOA Sub-MOA
Operation Semi-automatic Semi-automatic
Design Bullpup Bullpup