SIG MCX Rattler Upper Receiver for VFC — Airsoft AEG/GBB Drop-In Replacement, Full Picatinny Rail, FDM No Supports

The SIG MCX Rattler Upper Receiver is a direct replacement upper designed specifically for VFC MCX Rattler airsoft platforms. A precise recreation of the iconic compact upper receiver profile that defines the Rattler's distinctive look — featuring the full-length top Picatinny rail, forward assist, dust cover, and charging handle slot, all faithfully modeled for drop-in fitment. Every detail is captured — the clean flat-top receiver profile with continuous Picatinny rail from receiver to handgu