Foxtrot Mike Products Complete FM-15 GEN 2 .223 Wylde AR-15 Upper Receiver - 9" Barrel - Fixed Gas Block

The Foxtrot Mike Products FM-15 Gen 2 Side Charging AR-15 Upper Receiver features a unique dual spring recoil system nested in the top of the upper receiver allowing the use of a folding stock. This recoil system is paired with a carbine length direct impingement gas system and a proprietary lightweight bolt carrier group for a smooth and reliably functioning rifle. The fixed gas block features an indexing pin and a coil pin to keep it locked in place against the lightweight contoured barrel for an extremely robust system.

Features:

• Machined from a billet of aluminum
• 4 Position side charging handle
• Slim M-LOK handguard
• .223 Wylde chambering
• Proprietary lightweight BCG
• Picatinny rail adapter with QD sling mount
• 9"  barrel
• Fixed gas block 
• Carbine gas system
• Compatible with Mil-Spec lowers (buffer and buffer spring will not be used)

The barrel features a .223 Wylde chamber and a 1:8 twist rate for compatibility with a wide range of ammunition. Additionally, it features a lightweight contour and at 9 inches in length.