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
- 1st - 3rd Gen 1 item
- 9mm, .40, .357 1 item
- .45 ACP 1 item
- Curved 2 items
- Flat 1 item
- Gen 1-3 2 items
- Gen 3 17 items
- Gen 4 15 items
- GEN 4/5 1 item
- Gen 5 13 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
- Right Hand 1 item
- Stainless Steel 2 items
- Standard 1 item
- Straight 1 item
- Titanium 1 item
- Tungsten 2 items
- G17 6 items
- G19 9 items
- G26 2 items
- G42 1 item
- G43 6 items
- P320 6 items
- P365 3 items
- P365XL 2 items
- Tritium Stealth Sights 1 item
- Handgun 5 items
- Aluminum 2 items
- Battleworn 1 item
- Black 10 items
- Black/Black 7 items
- Black DLC 1 item
- Black/Nickel 6 items
- Black/TiN 7 items
- Blue 3 items
- Cerakote 1 item
- Chameleon 1 item
- Clear 1 item
- DLC 34 items
- Gold 9 items
- Gray 4 items
- Grey 5 items
- MDC (Gray) 1 item
- Melonite 1 item
- Nitride 7 items
- Polished 1 item
- Red 2 items
- Titanium Nitride 1 item
- Anodize 5 items
- PVD/CVD 5 items
- Quench Polish Quench (QPQ) 1 item
- Titanium Nitride (TiN) 30 items
- Titanium-Carbo Nitride (TiCN) 1 item
- Molecular Dense Coating (MDC) 14 items
- Aeroknox 1 item
- Agency Arms 32 items
- Align Tactical 12 items
- Apex Tactical Specialties 37 items
- ARC Division 4 items
- Armaspec 1 item
- Arms Republic 6 items
- Battle Arms Development 6 items
- Benchmade 1 item
- CAA 5 items
- CMC Triggers 2 items
- Danger Close Armament 10 items
- Dark Hour Defense 2 items
- Devil Dog Concepts 3 items
- DPM Systems Technologies 53 items
- Driven Arms Co. 1 item
- Elzetta Design LLC 1 item
- Emissary Development 1 item
- Empire 2 items
- Faction 1 item
- Faxon Firearms 20 items
- Form Rifle 2 items
- Fortis MFG 3 items
- Forward Controls Design 11 items
- GoGun USA 2 items
- Grayguns 24 items
- Grey Ghost Precision 3 items
- Griffin Armament 7 items
- Handleitgrips 9 items
- HB Industries 7 items
- Iron City Rifle Works 1 item
- Kagwerks 3 items
- Killer Innovations 54 items
- KNS Precision 1 item
- L2D Combat 5 items
- Lantac 11 items
- Laugo Arms 1 item
- Lone Wolf Arms 10 items
- Magpul Industries 3 items
- Matrix Arms 2 items
- Mirzon 3 items
- Mischief Machine 4 items
- Modular Evolution LLC 1 item
- NIGHT FISION 25 items
- Nighthawk Custom 6 items
- Nomad Defense 18 items
- Norsso 12 items
- Noveske 5 items
- Obsidian Arms 2 items
- Odin Works 1 item
- Polymer80 3 items
- Radian Weapons 6 items
- Rainier Arms, LLC 5 items
- Rainier Industries 1 item
- Red Dirt USA 5 items
- Reptilia Corp 1 item
- SCT Manufacturing 4 items
- Shalotek 18 items
- Sharps Bros 14 items
- Sig Mechanics 2 items
- Sig Sauer 29 items
- Spinta Precision 3 items
- Sprinco (Tactical Springs) 7 items
- Springer Precision 5 items
- Strike Industries 8 items
- Swampfox 1 item
- Tactical Development 4 items
- Tam Tamography 1 item
- Taran Tactical Innovations 7 items
- The Gun Co. 1 item
- Timney Triggers 4 items
- Toni Systems 4 items
- Trijicon 2 items
- Trinity Nevada 4 items
- TruCalibre 1 item
- True Precision 32 items
- TruGlo 2 items
- Tyrant Designs 50 items
- Wolff Gunsprings 1 item
- Zaffiri Precision 2 items
- ZEV Technologies 1 item
- Beretta 92X 1 item
- Beretta 92FS 1 item
- Beretta 96 1 item
- Beretta 98 1 item
- Canik TP9 1 item
- CZ 75 3 items
- CZ Shadow 2 items
- CZ P-01 1 item
- CZ P-10 9 items
- FNH 509 3 items
- FNH FNS 1 item
- FNH FNX-45 1 item
- Glock 17 103 items
- Glock 19 135 items
- Glock 19X 20 items
- Glock 20 8 items
- Glock 21 8 items
- Glock 22 38 items
- Glock 23 36 items
- Glock 24 20 items
- Glock 25 9 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 29 items
- Glock 33 24 items
- Glock 34 48 items
- Glock 35 33 items
- Glock 36 5 items
- Glock 37 22 items
- Glock 38 16 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 21 items
- Glock 47 5 items
- Glock 48 24 items
- Glock 49 1 item
- H&K P30 1 item
- H&K VP9 4 items
- Nomad 9 4 items
- Sig P22X 4 items
- Sig P220 9 items
- Sig P226 9 items
- Sig P228 4 items
- Sig P229 6 items
- Sig P238 3 items
- Sig P320 101 items
- Sig P365 43 items
- Sig P365-FUSE 2 items
- Sig P365X 14 items
- Sig P365XL 33 items
- Sig P365 X-Macro 8 items
- Sig P938 3 items
- S&W M&P 5 items
- S&W M&P M2.0 6 items
- S&W M&P Shield 9 items
- Springfield Hellcat 11 items
- Springfield Hellcat Pro 2 items
- Springfield XD 1 item
- Staccato 2011 2 items
- Walther Q4/Q5 1 item
- FN 509 1 item
- Standard 1 item
- 6lb 1 item
- 6.5lb 1 item
- 4lb 1 item
- V2 1 item
- Safety 2 items
- Manual Safety 1 item
- No Safety 2 items
- (Green) - 13 lbs 2 items
- (Blue) - 15 lbs 2 items
- (Red) - 18 lbs 2 items
- CZ 10 items
- FNH 3 items
- Glock 173 items
- Sig Sauer 58 items
- Smith & Wesson 13 items
- Springfield 1 item
- Left-Hand 2 items
- White/White 1 item
- White/Black 1 item
- Orange/Black 1 item
- White/Blank 1 item
- Flared 1 item
- Accessory 5 items
- Adapter Plate 1 item
- BackPack 1 item
- Backplate 3 items
- Barrel 3 items
- Basepad 7 items
- Bipod Mount 1 item
- Bolt Catch 1 item
- Charging Handle 2 items
- Compensator 45 items
- Extended Slide Stop 3 items
- Failure Resistant Extractor 1 item
- Fire Control Unit 2 items
- Firing Pin 2 items
- Flashlight Accessory 1 item
- Grip Accessory 9 items
- Grip Module 33 items
- Guide Rod 29 items
- Handguard 1 item
- Handgun Barrel 107 items
- Handgun Grip 5 items
- Handgun Sights 25 items
- Iron Sight 1 item
- Knife 1 item
- Laser 2 items
- Locking Block 2 items
- Magazine 5 items
- Magazine Catch 2 items
- Magazine Extension 6 items
- Magazine Release 19 items
- Magwell 38 items
- Optic Plate 4 items
- Parts Kit 8 items
- Pistol Accessory 10 items
- Pistol Frame 21 items
- Pistol Grip 1 item
- Pistol Part 33 items
- Pistol Sights 9 items
- Rear Sight 1 item
- Recoil Spring 48 items
- Safety Selector 1 item
- Sight Post 3 items
- Slide 73 items
- Slide Parts Kit 4 items
- Slide Plate 7 items
- Spring 5 items
- Stabilizer Kit 4 items
- Take Down / Pivot Pins 1 item
- Thumb Rest 5 items
- Trigger 64 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.
