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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Caliber
Category
Inside Diameter
Manufacturer
- Aero Precision 3 items
- Airborne Arms 1 item
- Andro Corp Industries 4 items
- Arms Republic 2 items
- Battle Arms Development 1 item
- Blitzkrieg Components 7 items
- Bootleg 1 item
- Bravo Company MFG (BCM) 10 items
- Brigand Arms 1 item
- Centurion Arms 9 items
- Cross Machine Tool (CMT) 2 items
- Daniel Defense 3 items
- DPM Systems Technologies 1 item
- F-1 Firearms 1 item
- Fortis MFG 15 items
- Forward Controls Design 9 items
- FosTecH 1 item
- Geissele 5 items
- Grey Ghost Precision 1 item
- Griffin Armament 5 items
- Half Cocked Arms (HCA) 1 item
- HERA ARMS 3 items
- Icarus Precision 1 item
- Jacob Grey 1 item
- JL Billet 4 items
- JP Enterprises Inc 8 items
- KNS Precision 3 items
- Lantac 1 item
- Lewis Machine & Tool (LMT) 1 item
- Magpul Industries 4 items
- Maxim Defense 3 items
- Next Level Armament 2 items
- Noveske 6 items
- Patriot Ordnance Factory (POF) 1 item
- Precision Armament 1 item
- Primary Weapon Systems 2 items
- Radian Weapons 6 items
- Rainier Arms, LLC 3 items
- Rainier Industries 3 items
- Rise Armament 1 item
- RogueOps 3 items
- Sharps Bros 5 items
- Silencerco 1 item
- Sons of Liberty Gun Works 4 items
- Strike Industries 2 items
- Tactical Edge Arms 1 item
- Timney Triggers 1 item
- Tyrant Designs 1 item
- Underground Tactical 1 item
- V Seven Weapon Systems 4 items
- VLTOR 4 items
Product Type
- AR-15 Assembled Upper Receiver 3 items
- AR-15 Charging Handle 17 items
- AR-15 Complete Lower Receiver 5 items
- AR-15 Complete Upper Receiver 4 items
- AR-15 Partial Upper Receiver 1 item
- AR-15 Handguard 34 items
- AR-15 Receiver Set 4 items
- AR-15 Stripped Lower Receiver 18 items
- AR-15 Stripped Upper Receiver 15 items
- Bolt 1 item
- Bolt Carrier Group 6 items
- Bolt Catch 4 items
- Brace 1 item
- Buffer 1 item
- Buffer Kit 3 items
- Buffer Spring 1 item
- Buffer Tube 1 item
- Castle Nut / End Plate 2 items
- Charging Handle 6 items
- Chassis 1 item
- Complete Upper 1 item
- Dust Cover 3 items
- Flash Hider 4 items
- Forearm Accesory 2 items
- Handguard 7 items
- Lower Parts Kit 5 items
- Magazine 1 item
- Muzzle Brake 2 items
- Pistol Grip 1 item
- Safety Selector 1 item
- Sight Post 7 items
- Silent Captured Spring 1 item
- Spring 1 item
- Stock 3 items
- Stock Adapter 1 item
- Take Down / Pivot Pins 4 items
- Trigger 2 items
Rail Length
- 4" 1 item
- 4.25" 1 item
- 4.5" 1 item
- 5.5" 1 item
- 6.7" 5 items
- 7" 6 items
- 7.2" 1 item
- 7.5" 2 items
- 8" 1 item
- 8.5" 2 items
- 8.6" 1 item
- 9" 6 items
- 9.15" 2 items
- 9.2" 1 item
- 9.3" 1 item
- 9.5" 5 items
- 9.55" 1 item
- 9.6" 5 items
- 10" 9 items
- 10.3" 1 item
- 10.5" 5 items
- 11" 3 items
- 11.1" 1 item
- 11.25" 1 item
- 11.5" 2 items
- 11.8" 2 items
- 12" 13 items
- 12.3" 1 item
- 12.4" 2 items
- 12.43" 1 item
- 12.5" 3 items
- 12.6" 3 items
- 12.8" 1 item
- 13" 4 items
- 13.5" 7 items
- 13.7" 1 item
- 13.8" 5 items
- 14.3" 1 item
- 15" 17 items
- 15.3" 5 items
- 16.3" 1 item
- 16.5" 4 items
- 18" 1 item
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