Rifle Parts
Whether you're building a new rifle from scratch or looking to upgrade an existing firearm, our vast selection of rifle parts has everything you are going to need in that journey. At Rainier Arms' selection of rifle parts, you can find a wide variety of products including lower and upper parts, trigger parts, muzzle devices, and many more.
Explore our selection of high-quality parts coming from various leading manufacturers like Strike Industries, Magpul, BCM, and many more.
Also, don't forget to check our specially-made Rainier Arms barrels for your firearms.
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Lewis Machine & Tool (LMT) MRP Chrome Lined 5.56 NATO AR-15 Piston Barrel - 12"$695.70Out of stock
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Lewis Machine & Tool (LMT) MRP-H Chrome Lined .308 Win AR-10/LR308 Barrel - 16"$803.70Out of stock
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Lewis Machine & Tool (LMT) MRP-H Chrome Lined .308 Win AR-10/LR308 Barrel - 20"$627.30Out of stock
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Lewis Machine & Tool (LMT) MRP-H AR-10 QUAD Monolithic Upper Receiver - 12.75"$1,146.60Out of stock
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Lewis Machine & Tool (LMT) AR-15 MRP Chrome Lined 5.56 NATO AR-15 Barrel - 12.5"$538.20Out of stock