Parts
Our amazing offer consists of a great variety of AR-10, AR-15, and pistol parts and accessories. Purchase upper receivers, muzzle devices, handguards, BCG, barrels, triggers, magazine extensions, etc., and start modifying your firearm today.
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Firearm parts
Rainier Arms is the best place to purchase parts and accessories for your rifle or pistol online, and all that for more than affordable prices. Look no further, you can find here everything that comes to your mind and more! The best manufacturers in the business, like Killer Innovations, Lantac, Next Level Armament, Rainier Arms LLC, Apex Tactical Specialties, and many more are here to offer you their high-quality products. Select your preferred part and make your AR-10, AR-15 or pistol a unique piece of firearm.
- Model Glock 19 Remove This Item
- 9mm, .40, .357 1 item
- .45 ACP 1 item
- Gen 1-3 1 item
- Gen 3 13 items
- Gen 4 9 items
- GEN 4/5 1 item
- Gen 5 8 items
- Glock .40 cal Gen4 1 item
- Glock 9mm Gen4 1 item
- Glock Gen 5 2 items
- Large Backstrap 1 item
- Med Backstrap 1 item
- No Backstrap 1 item
- Stainless Steel 1 item
- Tungsten 1 item
- G19 9 items
- G42 1 item
- G43 2 items
- Tritium Stealth Sights 1 item
- Aluminum 1 item
- Battleworn 1 item
- Black 4 items
- Black/Black 2 items
- Black DLC 1 item
- Black/Nickel 2 items
- Black/TiN 2 items
- Blue 2 items
- Cerakote 1 item
- Clear 1 item
- DLC 14 items
- Gold 2 items
- Gray 2 items
- Grey 2 items
- Nitride 2 items
- Polished 1 item
- Red 1 item
- Anodize 2 items
- Titanium Nitride (TiN) 9 items
- Molecular Dense Coating (MDC) 3 items
- Agency Arms 17 items
- Align Tactical 1 item
- Apex Tactical Specialties 9 items
- ARC Division 1 item
- Armaspec 1 item
- Arms Republic 1 item
- Battle Arms Development 4 items
- CAA 3 items
- CMC Triggers 2 items
- Danger Close Armament 1 item
- DPM Systems Technologies 3 items
- Faction 1 item
- Faxon Firearms 2 items
- Fortis MFG 2 items
- Forward Controls Design 2 items
- Griffin Armament 2 items
- Kagwerks 1 item
- Killer Innovations 13 items
- L2D Combat 3 items
- Lantac 1 item
- Lone Wolf Arms 5 items
- Magpul Industries 2 items
- Matrix Arms 2 items
- NIGHT FISION 2 items
- Nomad Defense 10 items
- Norsso 7 items
- Noveske 2 items
- Polymer80 1 item
- Radian Weapons 2 items
- Reptilia Corp 1 item
- SCT Manufacturing 2 items
- Spinta Precision 1 item
- Sprinco (Tactical Springs) 1 item
- Strike Industries 1 item
- Swampfox 1 item
- Tam Tamography 1 item
- Taran Tactical Innovations 1 item
- Timney Triggers 2 items
- Trinity Nevada 4 items
- True Precision 3 items
- TruGlo 1 item
- Tyrant Designs 14 items
- Zaffiri Precision 1 item
- Accessory 1 item
- Barrel 2 items
- Basepad 2 items
- Compensator 10 items
- Extended Slide Stop 1 item
- Guide Rod 3 items
- Handgun Barrel 25 items
- Handgun Sights 3 items
- Magazine Catch 1 item
- Magazine Release 2 items
- Magwell 11 items
- Pistol Accessory 3 items
- Pistol Frame 7 items
- Pistol Part 8 items
- Recoil Spring 4 items
- Slide 32 items
- Slide Parts Kit 1 item
- Spring 2 items
- Stabilizer Kit 3 items
- Thumb Rest 1 item
- Trigger 17 items
What are the most common barrel thread patterns for pistols and rifles?
For .22LR, .22MAG, .17HMR, 9mm, and .223/5.56 NATO the most common thread pattern would be 1/2x28, with some exceptions for 9mm and .223/5.56 NATO firearms. As for .308/7.62mm and .338 Lapua Magnum, the thread pattern that is most commonly used is 5/8x24, with a few exceptions. Another typical thread pattern is 9/16x24 and it is mostly used for .40 S&W weapons.
Single triggers or two-stage triggers?
Whichever you choose, you cannot go wrong. The single trigger is fast and simple to use; as soon as you apply a small amount of pressure, the firearm goes off. Two-stage trigger is extremely accurate and you know precisely when the shot is going to be fired. The first stage prepares you for the second one, when the trigger pushes the hammer up causing the firearm to discharge. So, it is up to you to make a choice.
