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.
- Price $0.00 - $99.99 Remove This Item
- Agency Arms 1 item
- Angstadt Arms 1 item
- Apex Tactical Specialties 8 items
- Ascalon Arms 1 item
- DPM Systems Technologies 2 items
- Empire 8 items
- Faxon Firearms 2 items
- Glock 1 item
- GoGun USA 1 item
- Grayguns 8 items
- Griffin Armament 1 item
- HB Industries 1 item
- Kagwerks 1 item
- Krebs Customs 1 item
- L2D Combat 4 items
- Lantac 2 items
- Lone Wolf Arms 2 items
- Midwest Industries 1 item
- Next Level Armament 1 item
- NIGHT FISION 1 item
- Nomad Defense 4 items
- Norsso 2 items
- Rainier Arms, LLC 6 items
- Red Dirt USA 1 item
- SCT Manufacturing 1 item
- Shield Arms 1 item
- Sig Sauer 11 items
- SLR Rifleworks 3 items
- Sprinco (Tactical Springs) 1 item
- Springer Precision 5 items
- Stoeger 1 item
- Tactical Development 7 items
- Taran Tactical Innovations 11 items
- Toni Systems 1 item
- Tyrant Designs 8 items
- Wilson Combat 1 item
- CZ Scorpion 1 item
- CZ P-10 2 items
- FNH 509 1 item
- Glock 17 14 items
- Glock 19 15 items
- Glock 19X 6 items
- Glock 20 3 items
- Glock 21 3 items
- Glock 22 7 items
- Glock 23 7 items
- Glock 24 6 items
- Glock 25 3 items
- Glock 26 8 items
- Glock 27 6 items
- Glock 28 3 items
- Glock 29 3 items
- Glock 30 3 items
- Glock 31 7 items
- Glock 32 6 items
- Glock 33 6 items
- Glock 34 10 items
- Glock 35 8 items
- Glock 36 1 item
- Glock 37 4 items
- Glock 38 4 items
- Glock 39 4 items
- Glock 40 3 items
- Glock 41 3 items
- Glock 42 3 items
- Glock 43 4 items
- Glock 43X 6 items
- Glock 44 4 items
- Glock 45 6 items
- Glock 48 8 items
- H&K P2000 2 items
- H&K P30 2 items
- H&K VP9 1 item
- Nomad 9 2 items
- Sig P22X 2 items
- Sig P220 2 items
- Sig P226 3 items
- Sig P228 2 items
- Sig P229 2 items
- Sig P238 1 item
- Sig P320 17 items
- Sig P365 6 items
- Sig P365X 2 items
- Sig P365XL 6 items
- Sig P365 X-Macro 1 item
- Sig MPX 1 item
- S&W M&P Shield 1 item
- Springfield Hellcat 1 item
- Stoeger STR-9 1 item
- Walther PPQ 1 item
- Accessory 3 items
- Basepad 4 items
- Charging Handle 2 items
- Compensator 4 items
- Connector 1 item
- Extended Slide Stop 1 item
- Grip Accessory 1 item
- Grip Module 4 items
- Guide Rod 6 items
- Handgun Barrel 1 item
- Locking Block 1 item
- Magazine 2 items
- Magazine Accessory 1 item
- Magazine Catch 1 item
- Magazine Extension 1 item
- Magazine Release 5 items
- Magwell 13 items
- Muzzle Device Accessory 2 items
- Optic Plate 1 item
- Parts Kit 2 items
- Pistol Accessory 1 item
- Pistol Frame 5 items
- Pistol Part 22 items
- Pistol Sights 9 items
- Recoil Spring 2 items
- Red Dot Mount 1 item
- Safety Selector 1 item
- Slide Parts Kit 1 item
- Spring 1 item
- Trigger 12 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.
