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.
Dark mode is
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.
- Platform Glock Remove This Item
- Price $0.00 - $999.99 Remove This Item
- 1st - 3rd Gen 1 item
- 9mm, .40, .357 1 item
- .45 ACP 1 item
- Gen 1-3 2 items
- Gen 3 15 items
- Gen 4 12 items
- GEN 4/5 1 item
- Gen 5 11 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
- Stainless Steel 2 items
- Titanium 1 item
- Tungsten 2 items
- G17 5 items
- G19 9 items
- G26 2 items
- G42 1 item
- G43 6 items
- 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
- Chameleon 1 item
- Clear 1 item
- DLC 22 items
- Gold 9 items
- Gray 4 items
- Grey 5 items
- Nitride 3 items
- Polished 1 item
- Red 2 items
- Anodize 2 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 25 items
- Align Tactical 2 items
- Apex Tactical Specialties 13 items
- ARC Division 3 items
- Armaspec 1 item
- Arms Republic 2 items
- Battle Arms Development 6 items
- CAA 3 items
- CMC Triggers 2 items
- Danger Close Armament 2 items
- Devil Dog Concepts 3 items
- DPM Systems Technologies 12 items
- Empire 1 item
- Faction 1 item
- Faxon Firearms 6 items
- Fortis MFG 2 items
- Forward Controls Design 6 items
- Grayguns 1 item
- Grey Ghost Precision 2 items
- Griffin Armament 4 items
- Kagwerks 2 items
- Killer Innovations 26 items
- L2D Combat 4 items
- Lantac 6 items
- Lone Wolf Arms 10 items
- Magpul Industries 3 items
- Matrix Arms 2 items
- NIGHT FISION 12 items
- Nomad Defense 13 items
- Norsso 8 items
- Noveske 5 items
- Polymer80 2 items
- Radian Weapons 2 items
- Rainier Arms, LLC 4 items
- Reptilia Corp 1 item
- SCT Manufacturing 4 items
- Spinta Precision 3 items
- Sprinco (Tactical Springs) 5 items
- Strike Industries 4 items
- Swampfox 1 item
- Tactical Development 1 item
- Tam Tamography 1 item
- Taran Tactical Innovations 4 items
- Timney Triggers 4 items
- Trinity Nevada 4 items
- True Precision 8 items
- TruGlo 2 items
- Tyrant Designs 29 items
- Zaffiri Precision 2 items
- ZEV Technologies 1 item
- Glock 17 99 items
- Glock 19 136 items
- Glock 19X 19 items
- Glock 20 8 items
- Glock 21 8 items
- Glock 22 38 items
- Glock 23 38 items
- Glock 24 20 items
- Glock 25 11 items
- Glock 26 33 items
- Glock 27 25 items
- Glock 28 6 items
- Glock 29 7 items
- Glock 30 7 items
- Glock 31 34 items
- Glock 32 31 items
- Glock 33 24 items
- Glock 34 48 items
- Glock 35 33 items
- Glock 36 5 items
- Glock 37 22 items
- Glock 38 17 items
- Glock 39 16 items
- Glock 40 7 items
- Glock 41 7 items
- Glock 42 5 items
- Glock 43 28 items
- Glock 43X 21 items
- Glock 44 6 items
- Glock 45 20 items
- Glock 47 4 items
- Glock 48 23 items
- Sig P320 1 item
- Sig P365 1 item
- Accessory 2 items
- Adapter Plate 1 item
- Backplate 1 item
- Barrel 2 items
- Basepad 4 items
- Charging Handle 1 item
- Compensator 17 items
- Extended Slide Stop 1 item
- Firing Pin 1 item
- Guide Rod 16 items
- Handgun Barrel 58 items
- Handgun Sights 16 items
- Locking Block 1 item
- Magazine Catch 2 items
- Magazine Release 5 items
- Magwell 21 items
- Parts Kit 1 item
- Pistol Accessory 5 items
- Pistol Frame 11 items
- Pistol Part 14 items
- Pistol Sights 6 items
- Recoil Spring 7 items
- Slide 40 items
- Slide Parts Kit 4 items
- Slide Plate 5 items
- Spring 3 items
- Stabilizer Kit 3 items
- Thumb Rest 2 items
- Trigger 24 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.