Heckler & Koch G28
Heckler & Koch · Sniper Rifle · In Production · 2012
Also known as: G28, M110A1, CSASS, HK G28E, Compact Semi-Automatic Sniper System
Overview
The Heckler & Koch G28 is a designated marksman rifle adopted by the German Bundeswehr in 2012, based on the HK417 battle rifle platform. Featuring a free-floating barrel, short-stroke gas piston system, and match-grade two-stage trigger, the G28 provides sub-MOA accuracy in a semi-automatic platform that allows rapid follow-up shots. The rifle was selected by the United States military as the M110A1 Compact Semi-Automatic Sniper System (CSASS), replacing the Knight's Armament M110 SASS.
Specifications
| Weight (empty) | 5500 g (194.0 oz) |
| Weight (loaded) | 6200 g (218.7 oz) |
| Overall Length | 1025 mm (40.35") |
| Barrel Length | 420 mm (16.54") |
| Action Type | Gas Operated Short Stroke Piston |
| Firing Mechanism | Hammer Fired |
| Trigger Type | Two Stage |
| Trigger Pull | 20 N (4.5 lbf) |
| Magazine Capacity | 20 rounds |
| Magazine Type | Detachable Box |
| Muzzle Velocity | 780 m/s (2559 fps) |
| Muzzle Energy | 2890 J (2132 ft·lbf) |
| Effective Range | 800 m (875 yd) |
| Maximum Range | 1500 m (1640 yd) |
| Rate of Fire | 600 rpm |
| Barrel Rifling | Right Hand |
| Rifling Twist | 280 mm (11.02") |
| Number of Grooves | 4 |
| Frame Material | Aluminum Alloy |
| Barrel Material | Steel |
| Stock Material | Polymer Adjustable |
| Finish | Tan Cerakote |
Calibers
- 7.62x51mm NATO · primary · 7.62x51mm NATO — also known as .308 Winchester, 7.62mm NATO, 7.62x51mm
Features
- Firing modes: Semi Automatic
- Feed systems: Detachable Box Magazine
- Safety mechanisms: Ambidextrous Safety, Firing Pin Safety
- Features: Free Floating Barrel, Picatinny Quad Rail, Adjustable Gas Regulator, Suppressor Ready, Adjustable Buttstock, Adjustable Cheek Piece, Ambidextrous Controls, Hk Proprietary Upper Receiver
Variants
- G28 Standard — Patrol Variant
- G28E — Export
- M110A1 CSASS — Us Military
Service history
Operators
- German Bundeswehr · adopted 2012 · as G28
- German Kommando Spezialkräfte · adopted 2012 · as G28
- United States Army · adopted 2016 · as M110A1 CSASS
- United States Marine Corps · adopted 2018 · as M110A1 CSASS
- Lithuanian Armed Forces · as G28E
- French Special Forces
Conflicts
- War in Afghanistan (2012-2021)
- Operation Inherent Resolve (Iraq/Syria) (2014-present)
Production
Production years: 2012-present
In active production by Heckler & Koch. The US Army awarded a contract for approximately 5,000 M110A1 CSASS units. Total worldwide production figures not publicly disclosed.
Origin
Country of origin: Germany
Notes
The G28 is derived from the HK417 but with significant modifications for the precision shooting role including a match barrel, improved trigger, and enhanced optics mounting system. The Bundeswehr procured the G28 in two configurations: the Patrol variant with a shorter barrel for general use, and the Standard variant with a longer barrel optimized for precision shooting. The US M110A1 CSASS variant is chambered in 7.62 NATO and uses a 16.5-inch barrel, slightly shorter than the German standard variant. The G28's short-stroke gas piston system provides excellent reliability while keeping the action cleaner than direct-impingement systems.
Background
The G28's selection as the US military's M110A1 CSASS marked the first time a German-designed semi-automatic precision rifle was adopted as a standard-issue American military weapon. The rifle beat out several American competitors, a testament to HK's engineering of the short-stroke piston system that delivers both precision accuracy and the legendary HK reliability in adverse conditions.