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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Barrel Length
Caliber
Manufacturer
- A3 Tactical 1 item
- Aero Precision 1 item
- Aeroknox 3 items
- Angstadt Arms 1 item
- B5 Systems 1 item
- Battle Arms Development 2 items
- Bravo Company MFG (BCM) 4 items
- Cross Machine Tool (CMT) 4 items
- Daniel Defense 1 item
- Drew Meyers Defense 1 item
- Ergo Grips 3 items
- Faxon Firearms 1 item
- Fortis MFG 2 items
- Forward Controls Design 1 item
- Geissele 2 items
- JMAC Customs 1 item
- Kinetic Development Group 2 items
- Knight’s Armament Company (KAC) 2 items
- Lewis Machine & Tool (LMT) 1 item
- Magpul Industries 2 items
- Maxim Defense 4 items
- Midwest Industries 7 items
- Next Level Armament 1 item
- Noveske 9 items
- Rainier Arms, LLC 3 items
- Sharps Bros 2 items
- Sig Sauer 1 item
- Sionics Weapon Systems 1 item
- SLR Rifleworks 1 item
- Sons of Liberty Gun Works 4 items
- True North Concepts 2 items
- V Seven Weapon Systems 1 item
- VKTR Industries 1 item
- VLTOR 1 item
Product Type
- Accessory 1 item
- Angled Grip 2 items
- AR-10 Handguard 1 item
- AR-15 Complete Upper Receiver 9 items
- AR-15 Partial Upper Receiver 6 items
- AR-15 Handguard 19 items
- Chassis 2 items
- Complete Upper 1 item
- Forearm Accesory 3 items
- Handguard 11 items
- Handstop 10 items
- Rail Cover 1 item
- Rail Section 1 item
- Sling Mount 2 items
- Vertical Grip 7 items
Rail Length
- 3" 1 item
- 4" 1 item
- 5.5" 1 item
- 6.0" 2 items
- 6.7" 3 items
- 7" 3 items
- 7.2" 1 item
- 8.25" 1 item
- 9" 2 items
- 9.3" 1 item
- 9.5" 7 items
- 9.6" 1 item
- 9.75" 1 item
- 10" 2 items
- 10.5" 3 items
- 10.75" 1 item
- 11.1" 1 item
- 11.5" 1 item
- 12" 2 items
- 12.4" 1 item
- 12.5" 1 item
- 13" 4 items
- 13.5" 2 items
- 13.625" 1 item
- 13.7" 4 items
- 13.8" 1 item
- 14" 3 items
- 15" 15 items
- 15.3" 1 item
- 16" 1 item
- 16.5" 1 item
- 17" 1 item
- 18" 1 item
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