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Product Info for STNGR AR-15 .300 Blackout 10.5in M-LOK Complete Upper w/13.5in HWKXL Handguard, BCG & CH
This complete upper from STNGR delivers a purpose-built 300 BLK platform for shooters who want maximum versatility in a compact package. The 10.5-inch barrel is the sweet spot for 300 BLK - whether you're running supersonic loads for hunting and home defense or subsonic rounds with a suppressor for quiet work. This is the foundation for suppressor hosts, hunting rifles, and close-quarters setups where you need hard-hitting performance without the length. The 13.5-inch HWKXL handguard extends past the muzzle for that clean, tucked look - perfect if you're planning to add a suppressor down the line.
The AT3 10.5-inch medium profile barrel in 300 BLK pairs with a pistol-length gas system for reliable cycling with both supersonic and subsonic ammunition. The STNGR HWKXL handguard is built from 6061-T6 aluminum with M-LOK slots at 3, 6, and 9 o'clock, plus QD sling points front and rear. At just 8.7 ounces, it keeps the weight down while giving you a full-length top rail and plenty of room to mount lights, lasers, and grips. The KAK 5-inch extended flash can gives you extra length to fill the handguard and redirect concussion forward.
This upper comes fully assembled and ready to run - STNGR includes their phosphate chrome-lined M16 bolt carrier group with a C158 bolt and a standard GI charging handle. Built on AT3's slick side billet upper receiver with a low-profile .750 steel gas block and pistol-length stainless gas tube. Available in Black, Flat Dark Earth, and OD Green to match your build.
Specifications for STNGR AR-15 .300 Blackout 10.5in M-LOK Complete Upper w/13.5in HWKXL Handguard, BCG & CH:
| Manufacturer: | STNGR |
| Caliber: | .300 AAC Blackout |
| Barrel Length: | 10.5 in |
| Barrel Profile: | Standard |
| Gas System Length: | Pistol Length |
| Barrel Twist Rate: | 1-7 |
| Firearms Threads Per Inch: | 5/8x24 |
| Handguard Type: | Free-Float |
| Muzzle Device: | Flash Hider |
| Gun Model: | AR-15 |
| Fabric/Material: | Steel |
| Gas Block Journal Size-Diameter: | .750 in |
| Handguard Length: | 13.5 in |
| Gun Rail: | M-LOK |
| Gun Make: | AR Platform |
| Barrel Material: | 4150 CMV Steel |
| Bolt Carrier Group Included: | MIL-SPEC |
| Charging Handle Included: | MIL-SPEC |
Features of STNGR AR-15 .300 Blackout 10.5in M-LOK Complete Upper w/13.5in HWKXL Handguard, BCG & CH
- M-LOK slots at 3, 6, and 9 o'clock with QD sling points front and rear
- Full-length top Picatinny rail for optics and accessories
- STNGR phosphate chrome-lined BCG with C158 bolt and standard GI charging handle included
- Slick side billet upper receiver for clean lines
- KAK 5-inch extended flash can redirects muzzle blast forward
Package Contents:
- STNGR AR-15 .300 Blackout 10.5in M-LOK Complete Upper w/13.5in HWKXL Handguard, BCG & CH
STNGR AR-15 .300 Blackout 10.5in M-LOK Complete Upper w/13.5in HWKXL Handguard, BCG & CH Orderable Models
List of Orderable Models
- STNGR AR-15 .300 Blackout 10.5in M-LOK Complete Upper w/13.5in HWKXL Handguard, BCG & CH, Black, Anodized, STNGRCUPHWKXL105BLK300 , MPN: STNGR-CU-P-HWKXL-105-BLK-300 , Code: 4MB-UFH-URH13-STNGRCUPHWKXL105BLK300
- STNGR AR-15 .300 Blackout 10.5in M-LOK Complete Upper w/13.5in HWKXL Handguard, BCG & CH, Flat Dark Earth, Cerakote, STNGRCUPHWKXL105FDE300 , MPN: STNGR-CU-P-HWKXL-105-FDE-300 , Code: 4MB-UFH-URH13-STNGRCUPHWKXL105FDE300
- STNGR AR-15 .300 Blackout 10.5in M-LOK Complete Upper w/13.5in HWKXL Handguard, BCG & CH, OD Green, Cerakote, STNGRCUPHWKXL105ODG300 , MPN: STNGR-CU-P-HWKXL-105-ODG-300 , Code: 4MB-UFH-URH13-STNGRCUPHWKXL105ODG300