STNGR 12.5 Inch 5.56 Complete Upper w/ 13.5 Inch HWKXL® Handguard, BCG & CH

Be the first to review

Out of Stock
Orders will Ship within 3 Business Days
SWARM Warranty
TOP ADD-ON'S
AT3 Pro-Builder AR-15 Lower Build Kit

AT3™ Pro-Builder™ Black AR-15 Lower Build Kit

$69.98
AT3 Tactical AT-15 Lower with Rise Armament Rave 140 Trigger - Black - Flat

AT3™ AT-15 Lower Receiver with Rise Armament Rave 140 Single Stage Trigger

$237.99

STNGR 12.5″ 5.56 Complete Upper with 13.5″ HWKXL® Suppressor-Ready Handguard, BCG & CH

This complete upper from STNGR delivers a balanced, versatile platform for shooters who want a compact setup with suppressor-ready capabilities. The 12.5-inch barrel hits the sweet spot for velocity and maneuverability, making it ideal for home defense, patrol work, or all-purpose range use where you want something more capable than a 10.5-inch pistol but still compact enough to move with. 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 KAK 12.5-inch barrel in 5.56 NATO pairs with a mid-length gas system for smooth, reliable cycling and reduced recoil compared to carbine-length systems. 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.

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, mid-length stainless gas tube, and KAK Slimline flash can. 

Features

  • 12.5-inch KAK barrel with mid-length gas system for smooth cycling
  • 13.5-inch STNGR HWKXL handguard with suppressor-ready design for tucked muzzle devices
  • 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 Slimline flash can redirects muzzle blast forward
  • Available in Black, Flat Dark Earth, and OD Green

Specifications

  • Brand: STNGR
  • Model: 12.5 Inch 5.56 Complete Upper w/ 13.5 Inch HWKXL® Handguard, BCG & CH
  • MPN: STNGR-CU-P-HWKXL-125
  • Caliber: 5.56 NATO
  • Barrel Length: 12.5 inches
  • Gas System: Mid-length
  • Handguard Length: 13.5 inches (actual 13.75 inches)
  • Handguard Type: M-LOK free-float
  • Handguard Material: 6061-T6 Aluminum
  • Handguard Weight: 8.7 ounces
  • Inside Diameter: 1.75 inches
  • Upper Receiver: Slick side billet
  • Gas Block: .750 low-profile steel
  • Bolt Carrier Group: STNGR phosphate chrome-lined M16 with C158 bolt
  • Charging Handle: Standard GI
  • Muzzle Device: KAK Slimline flash can (1/2×28 thread)
  • Color Options:
    • Black – Type 3 Hardcoat Anodized
    • Flat Dark Earth – H-267 Cerakote Magpul® Flat Dark Earth
    • OD Green – H-232 Cerakote Magpul® OD Green

What’s Included – Installed

Products available on this page:

The AT3 Tactical store has a 90 day no-hassle return policy for products in good condition. You can view the full details of our return policy here.

If you encounter an issue or defect with a product after 90 days of your purchase, you can refer to the manufacturer for a warranty claim. Their policies are below.

SWARM Warranty

STNGR USA products are warranted to the *original purchaser against any defects in materials and workmanship for the lifetime of the product. STNGR USA has sole discretion to determine manufacturer’s defects. The Swarm Warranty policy does not cover loss or theft. Cosmetic damage or changes that leave the product still in a functional condition, damage from improper use or intentional damages are also not covered by the warranty and will not be accepted. Items that have been modified or in any way altered from the original condition are not covered by the Swarm Warranty.

Eyewear lenses are fully covered by a 1 year scratch warranty. If you scratch or damage your lenses within 1 year of purchasing, STNGR will send you up to 1 pair of replacement lenses. This warranty only applies to the original purchase and not subsequent replacements. You also qualify for **20% off replacement lenses for life. Email  to receive your discount code.

Eyewear Lost & Broken Replacement Discount

Sometimes life happens. If you ever break or lose your sunglasses, no matter the reason, you’re covered with a hefty discount. Shoot STNGR an email at and you’ll get you hooked up with an exclusive 30% discount on future replacements.


*The original purchaser may have purchased from any of the following sources: Directly from STNGR (stngrusa.com or stngredge.com) or from an authorized dealer, distributor, or retailer. The original purchaser may be asked to show proof of purchase.

**The 20% discount is subject to replacement lens availability.

Leave your review
Rating

Questions & Answers

Don't see the answer
you're looking for?

Loading questions...