Collection of lower parts kits

Best AR Lower Parts Kits [2020]

Finish out your AR-15 or AR-10 build with the best lower parts kits on the market! We're sharing our favorite LPKs and extra parts kits to let you build away, worry-free. Read more!
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Rainier Arms Raptor Charging Handle

Best AR-15 Charging Handles

AR-15 upgrades are endless, but your search for the perfect charging handle doesn't have to be! Check out our list of the best AR-15 charging handles on the market today.
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Custom Piston AR-15

Best AR-15 Piston Uppers

Want to get the most out of your rifle? Give a piston-driven upper a try! We'll walk you through the best picks for every budget and tell you just what you need to know.
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Offset iron sights in use

Best Offset Iron Sights

Sure, scopes are great for range, but what do you do when you need a close-up shot? You use an offset iron sight, that's what. Firearm Review is running down the best offset BUIS on the market. Read more here!
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