SIG MCX Upper Receiver
Upper receiver · Sig Sauer
Last change: 0.3.x · not fully verified yet · current game 0.5

- Recoil
- Unknown
- Ergonomics
- Unknown
- Weapons it ends up on
- 1
What it changes
No stat recorded yet.
Fits on
What this part goes on, and in which slot.
Weapons it ends up on
Straight on the weapon or through other parts, up to three steps.
Takes
The slots this part offers, and what goes in them.
Barrel
3 partsHandguard
3 partsSight
13 partsShow 5 moreShow less
Mount
Description
The SIG MCX upper receiver is a monolithic aluminum design that serves as the firearm's primary structural component. Unlike conventional AR-15 uppers, the MCX upper integrates the top rail, barrel mounting system, and recoil mechanism into a single, rigid assembly, enhancing durability and performance.