SAA 16" 5.56 NATO M4 1:9 Carbine FF Budget Series4 Complete AR-15 Upper Receiver

SAA 16" 5.56 1:8 M4 YHM FF Tube Complete AR-15 Upper Receiver

SAA 16" 5.56 1:8 M4 BHW 416 SS Blackened, YHM FF Tube Complete AR-15 Upper Receiver

SAA 16" 5.56 M4 1:7 Nitride, YHM-5005 Rifle Smooth Complete AR-15 Upper Receiver

SAA 16" 5.56 NATO SOCOM 1:7, Mid FF YHM Keymod Complete AR-15 Billet Upper Receiver

SAA 16" 5.56 1:7 M4, YHM Diamond Series Carbine Free Float Complete AR-15 Upper Receiver

SAA 16" 5.56 1:7 M4, YHM KR7-Rifle Keymod Free Float Complete AR-15 Upper Receiver

SAA 16" 5.56 NATO M4 FF Carbine BCM-KMR-13 Keymod Complete AR-15 Upper Receiver

SAA 16" 5.56 NATO M4 FF Carbine BCM-MCMR-13 M-LOK Complete AR-15 Upper Receiver

SAA 16" 5.56 NATO Free Float Carbine YHM KR7 Keymod Complete AR-15 Upper Receiver

SAA 16" 5.56 NATO Free Float Carbine YHM MR7 MLOK Complete AR-15 Billet Upper Receiver

SAA 16" 5.56 1:7 TROY BRAVO 11" Quad-Rail Complete AR-15 Upper Receiver

SAA 16" 5.56 1:7, TROY ALPHA 11" Rail Complete AR-15 Upper Receiver

SAA 16" 5.56 M4 1:7 Nitride, FF Odin Works Keymod DeLite, Complete AR-15 Upper Receiver

SAA 16" 5.56 1:7 SS Match M4, Carbine YHM FF Tube Complete AR-15 Upper Receiver

SAA 16" 5.56 NATO Nitride 1:7 M4 15.25" Keymod FF Billet Upper Receiver

SAA 16" 5.56 NATO Nitride 1:9 HBAR 7.25" Keymod FF Billet Upper Receiver

SAA 16" 5.56 NATO Nitride 1:7 M4 9.25" Keymod FF Billet Upper Receiver

SAA 16" 5.56 1:7 Carbine YHM FF Complete AR-15 Upper Receiver

SAA 16" 5.56 Nitride SOCOM 1:7 Rifle YHM Todd Jarrett FF Complete AR-15 Upper Receiver

SAA 16" 5.56 NATO Nitride 1:7 M4, KM2-KEYMOD Free Float Upper Receiver

SAA 16" 5.56 M4 1:7 YHM 15" Diamond-DX FF Complete AR-15 Upper Receiver

SAA 16" 5.56 Nitride SOCOM 1:7 Mid YHM Todd Jarrett FF Complete AR-15 Upper Receiver

SAA 16" 5.56 NATO HBAR 1:9 Carbine FF Budget Series3 Complete AR-15 Upper Receiver