Loading...

Please wait...

AR15 Parts

Rainier Arms has one of the best selections of quality AR15 parts and AR15 accessories. Get a good deal online or come and visit our store. Find the best uppers, lowers, stocks, barrels, triggers, and more parts for your AR15 rifle.

Dark mode is

View as Grid List

Items 1-16 of 92

per page
  1. Tyrant Designs LWP Grip
    Tyrant Designs LWP Grip
    As low as $94.45
    Tyrant Designs LWP Grip Learn More
  2. Next Level Armament NLX Ambi Charging Handle - AR-15/AR-10
    Next Level Armament NLX Ambi Charging Handle - AR-15/AR-10
    As low as $71.00
    Next Level Armament NLX Ambi Charging Handle - AR-15/AR-10 Learn More
  3. Seekins Precision SELECT ADJUSTABLE GAS BLOCK
    Seekins Precision SELECT ADJUSTABLE GAS BLOCK
    As low as $114.00
    Seekins Precision SELECT ADJUSTABLE GAS BLOCK Learn More
  4. Lancer Systems AR-15 L5AWM 20RD Mag - Black
    Lancer Systems AR-15 L5AWM 20RD Mag - Black
    $16.09


    This product may be restricted in some areas. Please check your local and state laws for regulations covering magazine capacity.

    Learn More
  5. Odin Works AR-15 LOW Mass Bolt Carrier Group - Black Nitride
    Odin Works AR-15 LOW Mass Bolt Carrier Group - Black Nitride
    $170.05

    This BCG from ODIN Works is a High Performance* part that will change the way your rifle feels and shoots. This BCG has been significantly lightened, weighing in at only 9 ounces, it dramatically changes the amount of mass reciprocating in your gun. This BCG also features a Salt Bath Nitride finish that is both slick and durable. The carrier is made from 8620 steel and the bolt from 9310 steel.

    Bolt Carrier Group fits AR15/M4 compatible style Rifles (i.e.) .223/5.56mm, .300 Blackout.

    *This is a HP or High Performance part. It will change how your rifle feels and shoots. Tuning may be required to make the gun properly run with this part. This can be done via the gas system or the buffer system. 

    Weight 9 oz. 

    Learn More
  6. Patriot Ordnance Factory (POF) AR-15 Drop-In Trigger Assembly - Two Stage
    Patriot Ordnance Factory (POF) AR-15 Drop-In Trigger Assembly - Two Stage
    As low as $190.00

    Patriot Ordnance Factory (POF) AR-15 Drop-In Trigger Assembly - Two Stage

    Learn More
  7. Griffin Armament M4SD Hammer Comp 5.56mm
    Griffin Armament M4SD Hammer Comp 5.56mm
    $85.00

    Griffin Armament M4SD Hammer Comp 5.56mm

    Learn More
  8. Primary Arms 30MM Screw Magnifier Mount
    Primary Arms 30MM Screw Magnifier Mount
    $24.99
    Primary Arms 30MM Screw Magnifier Mount Learn More
  9. ODIN Works Picatinny BiPod Adapter Mount Rail
    ODIN Works Picatinny BiPod Adapter Mount Rail
    $34.20
    ODIN Works Picatinny BiPod Adapter Mount Rail Learn More
  10. Rainier Arms AR-15 UltraMatch Billet Upper & Ambi Lower Combo Set - MOD 3
    Rainier Arms AR-15 UltraMatch Billet Upper & Ambi Lower Combo Set - MOD 3
    $434.95


    FFL Required Before Shipping.

    Please have your dealer email a copy of their FFL to [email protected] or fax it to 253-218-2998, referencing your name and order number.

    Learn More
  11. Triggertech Adaptable AR Trigger - PVD Black
    Triggertech Adaptable AR Trigger - PVD Black
    As low as $249.99
    Triggertech Adaptable AR Trigger - PVD Black Learn More
View as Grid List

Items 1-16 of 92

per page
Google Customer Reviews Google Customer Reviews