You have to appreciate the quality firearms that Wilson Combat rolls out and now they are taking their precision one step further with their own Billet Upper and Lower matched AR-15 Receivers utilizing 7075-T6 aluminum.
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Once you get over the great name of the BILLet AR Upgrade, which integrates founder Bill Wilson, you will see the outstanding work they put out. As with standard billet lower receivers, you have an integrated trigger guard. They note an oversized mag well for quick reload and rigid walls. Otherwise you have a great upgrade to their already high end AR-15 platform rifles. The combined upgrade cost is $400, so considering the current market rates it is not too much of a stretch, especially with the premium work already put into their rifles. See full details and additional imagery at: WilsonCombat.com