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 - $999.99 Remove This Item
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- 1st - 3rd Gen 1 item
- 9mm, .40, .357 1 item
- .45 ACP 1 item
- Gen 1-3 1 item
- Gen 3 14 items
- Gen 4 10 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 2 items
- Med Backstrap 2 items
- No Backstrap 2 items
- G17 6 items
- G19 9 items
- G26 2 items
- G42 1 item
- G43 6 items
- P365XL 1 item
- Tritium Stealth Sights 1 item
- Aluminum 2 items
- Battleworn 1 item
- Black 10 items
- Black/Black 4 items
- Black DLC 1 item
- Black/Nickel 4 items
- Black/TiN 4 items
- Blue 3 items
- Cerakote 1 item
- Clear 1 item
- DLC 22 items
- Gold 9 items
- Gray 4 items
- Grey 5 items
- Nitride 1 item
- Polished 1 item
- Red 2 items
- Anodize 3 items
- PVD/CVD 2 items
- Titanium Nitride (TiN) 21 items
- Titanium-Carbo Nitride (TiCN) 1 item
- Molecular Dense Coating (MDC) 10 items
- Aeroknox 1 item
- Agency Arms 16 items
- Apex Tactical Specialties 11 items
- ARC Division 2 items
- Armaspec 1 item
- Arms Republic 1 item
- Battle Arms Development 6 items
- CAA 3 items
- CMC Triggers 2 items
- Danger Close Armament 1 item
- Devil Dog Concepts 3 items
- DPM Systems Technologies 5 items
- Faction 1 item
- Faxon Firearms 3 items
- Fortis MFG 2 items
- Griffin Armament 1 item
- Handleitgrips 1 item
- Kagwerks 1 item
- Killer Innovations 26 items
- KNS Precision 1 item
- L2D Combat 4 items
- Lantac 6 items
- Magpul Industries 3 items
- NIGHT FISION 8 items
- Nomad Defense 4 items
- Norsso 4 items
- Polymer80 1 item
- Radian Weapons 1 item
- Rainier Arms, LLC 3 items
- Reptilia Corp 1 item
- Sprinco (Tactical Springs) 5 items
- Strike Industries 4 items
- Swampfox 1 item
- Tam Tamography 1 item
- Timney Triggers 2 items
- Trinity Nevada 3 items
- True Precision 7 items
- Tyrant Designs 27 items
- ZEV Technologies 1 item
- Glock 17 67 items
- Glock 19 83 items
- Glock 19X 10 items
- Glock 20 5 items
- Glock 21 5 items
- Glock 22 28 items
- Glock 23 28 items
- Glock 24 11 items
- Glock 25 6 items
- Glock 26 26 items
- Glock 27 19 items
- Glock 28 3 items
- Glock 29 4 items
- Glock 30 4 items
- Glock 31 25 items
- Glock 32 22 items
- Glock 33 18 items
- Glock 34 35 items
- Glock 35 23 items
- Glock 36 3 items
- Glock 37 14 items
- Glock 38 11 items
- Glock 39 11 items
- Glock 40 4 items
- Glock 41 4 items
- Glock 42 3 items
- Glock 43 18 items
- Glock 43X 10 items
- Glock 44 4 items
- Glock 45 11 items
- Glock 48 9 items
- Nomad 9 1 item
- Sig P320 1 item
- Sig P365XL 1 item
- Backplate 1 item
- Basepad 3 items
- Compensator 18 items
- Extended Slide Stop 1 item
- Firing Pin 1 item
- Grip Accessory 1 item
- Guide Rod 11 items
- Handgun Barrel 30 items
- Handgun Sights 5 items
- Iron Sight 1 item
- Magazine Extension 3 items
- Magazine Release 5 items
- Magwell 17 items
- Parts Kit 2 items
- Pistol Accessory 4 items
- Pistol Frame 1 item
- Pistol Part 11 items
- Pistol Sights 5 items
- Recoil Spring 1 item
- Sight Post 1 item
- Slide 22 items
- Slide Parts Kit 2 items
- Slide Plate 5 items
- Stabilizer Kit 3 items
- 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.
