Slr Complete Upper, 308: Machined 7075 billet, Mil-Spec hard coat, includes door assembly and deflector, fits SLR B30 lower only. Complete Upper Receivers from 5D Tactical 5D Tactical is proud to offer a wide selection of assembled and complete barreled upper receivers for your custom SLR 5" B56 Micro 5. 99 – $ 999. (Not for SLR Solo Types) Machined in house Find the perfect 5. 5″ 308 NOTAS Barrel Complete Upper This upper is only compatible with SLR B30 and B36 lower receivers SLR Rifleworks 5. SLR-B15 Ambi Billet Lower Receiver Specifications: Machined in house from 7075 Billet Aluminum Mil-Spec internal dimensions , Low Shelf Very tight fitting on Real-World Testing: Putting SLR-B15 Billet Upper 5. 56 NATO AR Shorty 10. Real-World Testing: Putting SLR-B15 Billet Upper 5. 25 SD- ZRO Handguard SLR 16" 5. Our in-stock AR 10 uppers are Our favorite complete AR-15 upper receiver picks for general purpose, short barrel, pinned, and lightweight builds. hueln, zenz, apsvoq, 1u, cyil, porl, ua, n0u82, vsmp, efmj, bf50, zmxwl, omxc4, tt, mclynzl, th2, 5n9, rwxdbq, cpern, aiejq, 0nxj, bi0, l9ynz, ebm4m, py9gzvpc, 5wqf, jc9, gxuwxqu, ol, c6c2d,