Stag 15 Trinity Upper

$349.99 $299.99
You save: $50.00
Current stock: 0


The Stag 15 Trinity Series is a partnership between Stag Arms and Trinity Force that offers a unique balance of durability and precision. 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

SKU: STAG570043N

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)

Christopher 10th Sep 2018


Stag Arms!!! You guys rock!! First off, i don’t live in a free state, so finding someone who will do the compliance work at the factory, FOR FREE, is just incredible. Second, this thing is quality quality QUALITY. Everything looks great, the pin/weld on the compensator is done perfectly. Love the 1/7 twist. It’s incredibly accurate out of the box with the right load. Have well over 2k rounds through it already without a single hiccup. Can’t say enough about it. If you’re considering stag arms, just go for it. You won’t be disappointed.