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

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SWARM Warranty

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STNGR 12.5″ 5.56 Complete Upper – Carbine Length Gas with 13.5″ HWKXL Suppressor-Ready Handguard, BCG & CH

Features

12.5″ Ballistic Advantage Modern Series 5.56 NATO barrel – carbine-length gas system
Government profile, 1:7 twist, 4150 CMV steel with QPQ nitride finish
13.5″ STNGR HWKXL handguard with extended, suppressor-ready design
M-LOK slots at 3, 6, and 9 o’clock with integrated QD sling points
Slick side billet upper receiver with .750 low-profile gas block
STNGR phosphate chrome-lined M16 BCG with C158 bolt and GI charging handle included
KAK Slimline flash can directs muzzle blast forward

This STNGR 12.5″ complete upper is built around a Ballistic Advantage Modern Series government profile barrel with a carbine-length gas system for dependable cycling in a compact setup. The 12.5″ length offers a solid balance of velocity and maneuverability, making it well suited for defensive builds, duty use, or a compact range rifle. The 13.5″ HWKXL handguard extends past the muzzle for a tucked, suppressor-ready look while maintaining a lightweight 6061-T6 free-float platform with plenty of usable rail space.

Disclaimer: Some components may vary from the images shown due to manufacturer updates or availability. All substitutions maintain the same performance standards and overall quality.

Specifications

Brand: STNGR
Model: 12.5″ 5.56 Complete Upper w/ 13.5″ HWKXL Handguard, BCG & CH
MPN: STNGR-CU-P-HWKXL-125
Caliber: 5.56 NATO
Barrel: Ballistic Advantage Modern Series, Government Profile
Barrel Length: 12.5 inches
Gas System: Carbine-length
Twist Rate: 1:7
Gas Block Diameter: .750
Muzzle Threads: 1/2×28
Handguard Length: 13.5 inches (actual 13.75 inches)
Handguard Type: Free-float M-LOK
Handguard Material: 6061-T6 Aluminum
Handguard Weight: 8.7 ounces
Inside Diameter: 1.75 inches
Upper Receiver: Slick side billet
Gas Block: Low-profile steel
Bolt Carrier Group: STNGR M16 phosphate chrome-lined with C158 bolt
Charging Handle: Standard GI
Muzzle Device: KAK Slimline Flash Can
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 support@stngrusa.com 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 support@stngrusa.com 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.

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