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.
Dark mode is
We can't find products matching the selection.
Shop By
Now Shopping by
Shopping Options
- Platform AR-15 Remove This Item
- Price $0.00 - $999.99 Remove This Item
Barrel Length
Caliber
Category
Finish
Gas System Length
Manufacturer
- A3 Tactical 1 item
- Aero Precision 7 items
- Angstadt Arms 1 item
- Ballistic Advantage 17 items
- Battle Arms Development 2 items
- Blackout Defense 1 item
- Bravo Company MFG (BCM) 14 items
- Centurion Arms 4 items
- Cross Machine Tool (CMT) 1 item
- Daniel Defense 2 items
- Ergo Grips 1 item
- Faxon Firearms 18 items
- Geissele 3 items
- Knight’s Armament Company (KAC) 1 item
- Lewis Machine & Tool (LMT) 9 items
- NEMO Arms 1 item
- Next Level Armament 2 items
- Noveske 10 items
- Obsidian Arms 1 item
- Q, LLC 2 items
- Radian Weapons 1 item
- Rainier Arms, LLC 19 items
- Sharps Bros 1 item
- Sons of Liberty Gun Works 5 items
- Spinta Precision 3 items
- Taran Tactical Innovations 1 item
- V Seven Weapon Systems 1 item
- VKTR Industries 4 items
Product Type
- AR-15 Barrel 74 items
- AR-15 Charging Handle 2 items
- AR-15 Complete Lower Receiver 10 items
- AR-15 Complete Upper Receiver 1 item
- AR-15 Partial Upper Receiver 10 items
- AR-15 Handguard 5 items
- AR-15 Receiver Set 2 items
- AR-15 Stripped Lower Receiver 6 items
- AR-15 Stripped Upper Receiver 2 items
- AR-15 Upper Receiver Group 1 item
- Bolt 1 item
- Bolt Carrier Group 4 items
- Bolt Catch 1 item
- Buffer Spring 1 item
- Charging Handle 2 items
- Compensator 1 item
- Firing Pin 1 item
- Magazine Catch 1 item
- Pistol Grip 2 items
- Safety Selector 1 item
- Stock 1 item
- Take Down / Pivot Pins 1 item
- Trigger 4 items
Rail Length
Thread Pitch
My Wish List