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AT3 AR 15 Pistol Lower Build Kit - KAK Pistol Brace, Magpul Grip, AT3 Lower Parts Kit and Buffer Assembly
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FAQ: My thumb doesn't fit. The endplate, buffer tube, and/or castle nut, rubs my hand. | by Sparrow Dynamics | Medium
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Hogue AR-15/M16 Kit - Grooved Beavertail Grip & Collapsible Buttstock for Commercial Buffer Tubes | Up to 15% Off 4.8 Star Rating w/ Free Shipping and Handling
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