Hey all. I am putting together my first ar and I wanted to get some feedback Upper: Yankee Hill Machine 16" M4 carbine complete upper assembly with a Specter length lightweight free float forearm YHM A3 flat top upper receiver with complete bolt carrier group. Receiver has the M4 feed ramps and white outline T-markings. YHM 16" black diamond fluted barrel (barrel and chamber are CHROME LINED), 1X7 twist, 5.56 chamber with Phantom toothed flash hider. YHM 4 rail, Specter length, lightweight free float forearm with low profile Specter gas block Lower: Sun devil manufacturing billet receiver Parts kit: Spikes tactical enhanced Stock: VLTOR E-MOD Stock Black AR Rifles AEBK-MB Yhm muzzle break Tapco sling system Let me know what you think about my choices. I also have a LWRC Free Floating Carbine Length Rail System sitting at home. Should I swap the yhm rail system for the lwrc? Thanks for your help!!