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 Sig P320 Remove This Item
- Platform Sig Sauer Remove This Item
- Agency Arms 5 items
- Align Tactical 4 items
- Apex Tactical Specialties 4 items
- ARC Division 1 item
- CAA 1 item
- Danger Close Armament 5 items
- DPM Systems Technologies 6 items
- Faxon Firearms 4 items
- GoGun USA 1 item
- Grayguns 9 items
- Grey Ghost Precision 1 item
- Killer Innovations 9 items
- L2D Combat 1 item
- Mirzon 3 items
- Mischief Machine 1 item
- NIGHT FISION 1 item
- Norsso 4 items
- Obsidian Arms 2 items
- Rainier Arms, LLC 2 items
- Sharps Bros 1 item
- Sig Sauer 14 items
- Springer Precision 1 item
- Strike Industries 1 item
- The Gun Co. 1 item
- True Precision 5 items
- Tyrant Designs 8 items
- BackPack 1 item
- Backplate 1 item
- Basepad 2 items
- Compensator 4 items
- Failure Resistant Extractor 1 item
- Fire Control Unit 1 item
- Grip Module 11 items
- Guide Rod 7 items
- Handgun Barrel 19 items
- Handgun Sights 1 item
- Magazine Release 5 items
- Magwell 6 items
- Parts Kit 1 item
- Pistol Accessory 1 item
- Pistol Frame 5 items
- Pistol Part 2 items
- Pistol Sights 3 items
- Recoil Spring 6 items
- Slide 9 items
- Slide Parts Kit 1 item
- Spring 1 item
- Stabilizer Kit 1 item
- Take Down / Pivot Pins 1 item
- Trigger 9 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.
