isurg - integrally suppressed upper receiver group
$1,750 MSRP
The KGM Integrally Suppressed Upper Receiver Group (ISURG) is purpose-built for 100% suppressed shooting, delivering excellent accuracy, repeatability, sound suppression, and flash reduction. The suppressor with integrated gas block is pinned to an 11.5” barrel, to achieve a 16.7” overall length barrel (5.56 version). This “one-stamp” solution provides for short-barrel capabilities without requiring an SBR tax stamp, as the suppressor is pinned and welded to the barrel. Because of this, the gas system has been tuned around this dedicated setup, offering optimum suppressed performance with a variety of ammunition.
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 spec BCG, charging handle and Back-Up Iron Sights (BUIS).
Specifications
| Caliber | 5.56mm NATO/.223 Rem |
| Suppressor Material | Hardened Stainless Steel |
| Upper OAL | 23.875″ (606 mm) |
| Barrel Length | 16.7” (552 mm) / 11.5″ rifling |
| Barrel Finish | Nitride |
| Barrel Twist | 1/7 |
| Upper Weight | 5.2 lb (2.35 kg) |
| Color(s) Available | Black |
Features
- 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.
- Intelligent baffle and gas-flow design: eliminates over-gassing and reduces toxic gases for the shooter and rifle.
- 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 withstand 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. (summer of 2024, shipping with Magpul®, MBUS 3)