Shop by Caliber - Guns and Parts
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.300Blackout
208 products
.300 Blackout
.308/AR-10Products
460 products
.308/AR-10 Products
9mm
619 products
9mm
7.62x39
61 products
7.62x39
.350Legend
50 products
.350 Legend
6.5Grendel
45 products
6.5 Grendel
6mmARC
49 products
6mm ARC
.450Bushmaster
21 products
.450 Bushmaster
.458SOCOM
16 products
.458 SOCOM
5.7x28
21 products
5.7x28
6.8SPC
5 products
6.8 SPC
.223/5.56
701 products
.223/5.56
.22LR
129 products
.22LR
6.5Creedmoor AR-10 Parts
54 products
6.5 Creedmoor AR-10 Parts
.224Valkyrie
10 products
.224 Valkyrie
.358Winchester
5 products
.358 Winchester
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Doorbuster
AT3™ AR-15 Bolt Carrier Group Black Nitride – .223/5.56 NATO .300 Blackout .350 Legend
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About Shop by Caliber
Find the right guns and parts you need for the caliber you’re aiming for. We have a vast number of AR-15 parts in a variety of calibers, from classic 5.56 NATO to .300 Blackout and newer cartridges like .350 Legend and 6mm ARC. Don’t forget the AR-10 platform in .308 Winchester, 6.5 Creedmoor, and more. Plus, pistols and components for handguns and pistol caliber carbines alike.