Stag 15L Trinity Upper

$349.99 $299.99
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The Stag 15L Trinity Series is a partnership between Stag Arms and Trinity Force that offers a unique balance of durability and precision for Left-Handed shooters. The Trinity Series is built around a 16” 1/7 twist chrome-lined barrel and the Trinity Force MX-15 M-LOK Rail.

The free-floating MX-15 M-LOK Rail offers a lightweight profile that increases ergonomics and maximizes airflow while providing superior strength and durability. The rail provides ample amount of M-LOK attachment points and an uninterrupted picatinny rail along the top, which allows for room for sights, optics and accessories the shooter may require.

This upper half does not include a BCG or Charging Handle.


Action: Semi-Auto Direct Impingement

Caliber: 5.56 NATO | .223

Twist Rate: 1/7 Button Rifled

Muzzle Device: A2 Flash Hider

Barrel: 16", 4150 Steel, Chrome Lined, Government Profile, Manganese Phosphate Coated

Handguard: Trinity Force 15" MX-15 M-LOK Rail

Receiver Material: Forged and Mil-Spec 7075 T6 Aluminum with Type 3 Hard Coat Anodizing

Bolt Carrier: None

Gas System: Carbine Length with Low Profile Gas Block

Charging Handle: None


This upper half does not include a BCG or Charging Handle.

*Product images are for illustrative purposes only and may differ from the actual product.


Q: What is the warranty coverage for this upper?

A: This upper has a one year warranty.

Q: Is this upper compatible with other manufacturer's lower receivers?

A: As long as the lower accepts a mil-spec upper, all of our uppers will function properly.


Reviews (1)

Jacob 6th Aug 2018

Stag 15L Trinity Upper and LH BCG

Have put about 250 rounds of steel cased TulAmmo through the gun so far without a single jam or hiccup. Works like a clock. The hand guard is sleek and very low profile. The only downside is that the rail system gets hot to the touch when firing multiple magazines through it, would recommend wearing gloves or buying a foregrip of some kind.