556 ISURG – Integral Suppressed Upper Receiver Group
Integrated Suppressed Upper Receiver Group
(ISURG)
Bolt-On, 1-Stamp Upper for AR-15s
The KGM Integrally Suppressed Upper Receiver Group (ISURG) is purpose-built for 100% suppressed shooting, excelling in heavy-firing schedules, accuracy, repeatability, and sound suppression.
With efficient gas management, it enhances precision by redirecting gas away from the bullet’s flight path, eliminating over-gassing, and reducing toxic gases through its Integrated Gas Flow (IGF) design. The gas system is tuned for suppressed shooting, ensuring reliable function with various ammunition types.
The suppressor with integrated gas block is pinned to an 11.5” barrel to achieve a 16.7” overall length barrel, balancing compactness with legal compliance. This upper receiver group is compatible with any AR-15 lower receiver group, the ISURG is out of the box ready with a full-auto BCG, charging handle and Back-Up Iron Sights (BUIS).
MSRP: $1,750
| Caliber | 5.56mm NATO/.223 Rem |
| Upper OAL | 23.875” (606.4 mm) |
| Upper Weight | 5.2 lb (2.35 kg) (w/BUIS) |
| Suppressor Material | Hardened Stainless Steel |
| Barrel Length | 16.7” (552 mm) 11.5” rifling |
| Barrel Twist | 1/7 |
| Barrel Finish | Nitride |
| Color Available | Black |
- Integrally Suppressed Design: Purpose-built upper designed for 100% suppressed shooting, delivering superior performance in full-auto firing, accuracy, repeatability, and sound suppression.
- Efficient Gas Flow Management: Minimizes disruption to the rifle’s performance by redirecting gas away from the bullet’s flight path, enhancing precision.
- Integrated Gas Flow (IGF) Design: Eliminates over-gassing and reduces toxic gases for a more comfortable shooting experience.
- High-Quality Stainless Steel Components: Meticulously crafted for durability, ensuring an extended service life, even under years of hard use. Can also be easily re-barreled and re-cored as needed.
- Gas System Tuned for Suppressed Shooting: Enhances forgiveness with different ammunition types, ensuring reliable function with training and duty ammunition.
- Pinned Suppressor to 11.5” Barrel for 16.7” OAL: Balances compactness with legal compliance.
- Full-Auto Rated and Capable: Built to surpass SOCOM full-auto firing schedules; includes F/A BCG.
- Out of the Box Ready: Complete upper receiver group, compatible with an AR-15 lower receiver group.
- Back-Up Iron Sights (BUIS) Included: Enhances versatility and readiness for a comprehensive out-of-the-box solution.