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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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  1. Ballistic Advantage AR-15 Stripped Lower Receiver
    Ballistic Advantage AR-15 Stripped Lower Receiver
    $80.75
    Out of stock
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  2. Centurion Arms AST AR-15 Advanced Sniper Trigger - 2-Stage
    Centurion Arms AST AR-15 Advanced Sniper Trigger - 2-Stage
    $88.82
    Out of stock
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  3. Primary Weapon Systems Enhanced Steel Body Buffer - Carbine H4/9mm (Suppressor Optimized)
    Primary Weapon Systems Enhanced Steel Body Buffer - Carbine H4/9mm (Suppressor Optimized)
    $84.96
    Out of stock
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  4. Aero Precision AR15 BREACH Ambi Charging Handle - Black
    Aero Precision AR15 BREACH Ambi Charging Handle - Black
    Out of stock
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  5. Dead Air Sandman Flash Hider Front Cap - 5.56
    Dead Air Sandman Flash Hider Front Cap - 5.56
    $89.00
    Out of stock
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  6. A3 Tactical Angled Foregrip - Grand Power Stribog
    A3 Tactical Angled Foregrip - Grand Power Stribog
    $85.45
    Out of stock
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  7. Sionics Weapon Systems (SWS) AR-15 Enhanced Lower Parts Kit - W/O Trigger Guard & Grip
    Sionics Weapon Systems (SWS) AR-15 Enhanced Lower Parts Kit - W/O Trigger Guard & Grip
    $85.95
    Out of stock
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  8. Sons of Liberty Gun Works AR10/AR15 Liberty Competition Trigger
    Sons of Liberty Gun Works AR10/AR15 Liberty Competition Trigger
    $80.75
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  9. A3 Tactical Aluminum Compact Modular Vertical Foregrip w/ Integrated Hand Stop - M-Lok Grenade Grip
    A3 Tactical Aluminum Compact Modular Vertical Foregrip w/ Integrated Hand Stop - M-Lok Grenade Grip
    $85.45
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  10. A3 Tactical Aluminum Compact Modular Vertical Foregrip w/ Integrated Hand Stop - M-Lok HK Grooved Grip
    A3 Tactical Aluminum Compact Modular Vertical Foregrip w/ Integrated Hand Stop - M-Lok HK Grooved Grip
    $85.45
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  11. V Seven Weapon Systems Extreme Environment Gas Tube - Rifle
    V Seven Weapon Systems Extreme Environment Gas Tube - Rifle
    $84.39
    Out of stock
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  12. Bravo Company MFG (BCM) GUNFIGHTER Ambidextrous Charging Handle 556 Mod 3X3 (Large Latch)
    Bravo Company MFG (BCM) GUNFIGHTER Ambidextrous Charging Handle 556 Mod 3X3 (Large Latch)
    $89.95
    Out of stock
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  13. Geissele Super Gas Block - Black
    Geissele Super Gas Block - Black
    $80.00
    Out of stock
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  14. Surefire PROCOMP Muzzle Brake for M4 / M16 Rifles and Variants-556
    Surefire PROCOMP Muzzle Brake for M4 / M16 Rifles and Variants-556
    $89.00
    Out of stock
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  15. Surefire PROCOMP Muzzle Brake for AR10/LR308 7.62mm
    Surefire PROCOMP Muzzle Brake for AR10/LR308 7.62mm
    $89.00
    Out of stock
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  16. Battle Arms Development Lightweight Low Profile Titanium Gas Block .625 -BLACK IONBOND
    Battle Arms Development Lightweight Low Profile Titanium Gas Block .625 -BLACK IONBOND
    $89.95
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