AR-15 Upper Receivers for .40 Smith and Wesson
Finding the right upper receiver for your next pistol caliber build doesn’t have to be hard. These uppers are compatible with .40 Smith and Wesson, and are ready for a new blowback barrel and BCG.
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Aero Precision EPC-9 Threaded AR 15 Upper Receiver w/ LRBHO for Glock Magazines
Glock Compatible Last Round Bolt Hold Open Upper Receiver With the debut of Aero Precision's EPC-9 lower receiver, comes the perfect match of an upper receiver. This upper mates perfectly...2 Options
Finding the right upper receiver for your next pistol caliber build doesn’t have to be hard. These uppers are compatible with .40 Smith and Wesson, and are ready for a new blowback barrel and BCG.
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