Rifle Parts
Whether you're building a new rifle from scratch or looking to upgrade an existing firearm, our vast selection of rifle parts has everything you are going to need in that journey. At Rainier Arms' selection of rifle parts, you can find a wide variety of products including lower and upper parts, trigger parts, muzzle devices, and many more.
Explore our selection of high-quality parts coming from various leading manufacturers like Strike Industries, Magpul, BCM, and many more.
Also, don't forget to check our specially-made Rainier Arms barrels for your firearms.
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Iron City Rifleworks S2 Nitride Elite 5.56/.223/300BLK BCGSpecial Price $139.92 Regular Price $189.99
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Timney Triggers CZ Scorpion Trigger - CurvedSpecial Price $252.99 Regular Price $304.99
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Timney Triggers IMPACT AR-15 Single Stage Trigger - StraightSpecial Price $150.99 Regular Price $181.99
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- Price $0.00 - $999.99 Remove This Item
Barrel Length
- 3.1" 1 item
- 3.66" 1 item
- 4" 5 items
- 4.5" 2 items
- 5" 5 items
- 5.25" 1 item
- 5.5" 7 items
- 6" 7 items
- 6.5" 2 items
- 6.75" 1 item
- 7" 3 items
- 7.25" 1 item
- 7.5" 9 items
- 7.75" 1 item
- 8" 9 items
- 8.3" 1 item
- 8.5" 5 items
- 9" 1 item
- 10" 3 items
- 10.3" 4 items
- 10.5" 29 items
- 10.7" 4 items
- 11.5" 8 items
- 12" 6 items
- 12.3" 1 item
- 12.5" 14 items
- 13.5" 1 item
- 13.7" 6 items
- 13.9" 3 items
- 14.5" 22 items
- 16" 75 items
- 16.1" 2 items
- 16.3" 1 item
- 17" 1 item
- 18" 57 items
- 20" 22 items
- 20.5" 1 item
- 22" 18 items
- 24" 7 items
- 26" 4 items
Caliber
- .22 ARC 2 items
- .22 Cal 2 items
- .22 LR 3 items
- .223/5.56 16 items
- .223 Rem 1 item
- .223 Wylde 36 items
- .30 Cal 9 items
- .308 9 items
- .308 Win 37 items
- .357 Magnum 2 items
- .44/.45 2 items
- .45-70 GOVT 2 items
- .45 ACP 4 items
- .458 Socom 1 item
- 12 Gauge 1 item
- 300 Blackout 23 items
- 300 Norma Mag 1 item
- 338 Lapua 2 items
- 350 Legend 2 items
- 5.56X45 2 items
- 5.56 NATO 95 items
- 5.56mm 8 items
- 6mm ARC 19 items
- 6.5 Creedmoor 29 items
- 6.5 Grendel 15 items
- 6.5 PRC 2 items
- 6.8 SPC 2 items
- 6MM Creedmoor 7 items
- 7.62mm 4 items
- 7.62x39 5 items
- 7.62x51 8 items
- 8.6 Blackout 5 items
- 9mm 62 items
Category
Configuration
- 90 Degree 1 item
- AR-10 3 items
- AR-15 18 items
- Clamp on Piston Block 1 item
- Cross 1 item
- Curved 21 items
- Flaming Pig 1 item
- Flat 22 items
- Gen 3 2 items
- Ghetto Blaster 1 item
- M-LOK 6 items
- M4 Curve 1 item
- Normal CQR 2 items
- Restricted CQR 2 items
- Rifle 2 items
- Right Hand 1 item
- Solid Piston Block 1 item
- Straight 7 items
- .625 DIA 5 items
- .750 DIA 5 items
- .800 DIA 2 items
- .875 DIA 3 items
- .936 DIA 3 items
- Standard Buffer and Spring 1 item
- Silent Captured Spring 9mm 1 item
- Enhanced Finger Placement (EFP) 1 item
- Type 1 Trunnion 1 item
- Type 2 Trunnion 1 item
- Large Latch 1 item
- Medium Latch 1 item
- Small Latch 1 item
- AK74 [WL 5.62"/143mm][HD .32"/8mm] 1 item
- AIMS-74 [WL 4.80"/122mm][HD .32"/8mm] 1 item
- AK-105 JBI Custom [WL 4.20"/107mm][HD .45"/11mm] 1 item
- AKM Large Bore [WL 5.83"/148mm][HD .31"/8mm] 1 item
- AMD65 [WL 4.67"/119mm][HD .31"/8mm] 1 item
- Arsenal Rifle Small Bore [WL 5.75"/146mm][HD .30"/8mm] 1 item
- Arsenal Rifle Large Bore [WL 5.75"/146mm][HD .30"/8mm] 1 item
- 5.45 Krinkov [WL 2.03"/52mm][HD .32"/8mm] 1 item
- 7.62 Krinkov [WL 2.22"/56mm][HD .31"/8mm] 1 item
- Bulgarian 5.45 Krinkov [WL 2.03"/52mm][HD .42"/11mm] 1 item
- Bulgarian AK74 [WL 5.62"/143mm][HD .42"/11mm] 1 item
- DRACO [WL 4.78"/121mm][HD .32"/8mm] 1 item
- Galil Ace [WL 2.15"/118mm][HD .32"/8mm] 1 item
- M85 [WL 4.41"/112mm][HD .31"/8mm] 1 item
- M92 2.218 [WL 3.90"/99mm][HD .30"/8mm] 1 item
- PSL [WL 3.90"/99mm][HD .30"/8mm] 1 item
- Valmet M76 / Galil Classic ARM [WL 4.20"/107mm][HD .45"/11mm] 1 item
- VEPR Small Bore [WL 5.62"/143mm][HD .32"/8mm] 1 item
- VEPR Big Bore [WL 5.62"/143mm][HD .32"/8mm] 1 item
- WZ89 Onyks [WL 2.15"/55mm][HD .32"/8mm] 1 item
- .478 +/- Bolt Face 1 item
Finish
- Bead Blast Stainless Steel 1 item
- Black 19 items
- Black Nitride 1 item
- Blue 1 item
- Case Hardened 1 item
- Carbon Fiber 6 items
- Cerakote 3 items
- DLC 5 items
- FDE 4 items
- Gold 1 item
- Grey 1 item
- Melonite 1 item
- NiB-X 3 items
- Nickel Boron 6 items
- Nitride 95 items
- Nitromet 6 items
- Phosphate 5 items
- Polished 36 items
- Red 3 items
- Satin 71 items
- Anodize 41 items
- Clear Hard Anodize 2 items
- PVD/CVD 1 item
- Quench Polish Quench (QPQ) 2 items
- Titanium Nitride (TiN) 1 item
Gas System Length
Inside Diameter
Manufacturer
- 21st Tec 6 items
- A3 Tactical 29 items
- Accu-Tac 1 item
- Advanced Armament Company (AAC) 3 items
- Aero Precision 13 items
- Agency Arms 1 item
- Airborne Arms 3 items
- ALG Defense 5 items
- American Trigger Company (ATC) 3 items
- Andro Corp Industries 8 items
- Angstadt Arms 7 items
- Apex Tactical Specialties 4 items
- Arisaka 7 items
- Armaspec 2 items
- Arms Republic 6 items
- Ascalon Arms 6 items
- Brügger & Thomet (B&T) 1 item
- B5 Systems 15 items
- Ballistic Advantage 18 items
- Battle Arms Development 15 items
- Black River MFG 1 item
- Blitzkrieg Components 16 items
- BOBRO 1 item
- Bootleg 2 items
- Boss Barrels 10 items
- Bravo Company MFG (BCM) 50 items
- Brigand Arms 2 items
- Centurion Arms 17 items
- Chisel Machining 4 items
- Christensen Arms 5 items
- CMC Triggers 1 item
- Cobalt Kinetics 1 item
- Cross Machine Tool (CMT) 8 items
- Daniel Defense 9 items
- Dead Air Armament 5 items
- Dead Foot Arms LLC 7 items
- Devil Dog Concepts 1 item
- Die Free Co 1 item
- DPM Systems Technologies 4 items
- Drew Meyers Defense 6 items
- Driven Arms Co. 17 items
- Eartune 1 item
- Elftmann Tactical 5 items
- Emissary Development 6 items
- Ergo Grips 1 item
- F-1 Firearms 3 items
- F5 MFG 3 items
- Faxon Firearms 39 items
- Form Rifle 2 items
- Fortis MFG 47 items
- Forward Controls Design 83 items
- FosTecH 1 item
- Gear Head Works 5 items
- Geissele 27 items
- Grand Power 2 items
- Grey Birch MFG 5 items
- Grey Ghost Precision 1 item
- Griffin Armament 16 items
- Half Cocked Arms (HCA) 1 item
- HB Industries 16 items
- HERA ARMS 14 items
- Heresy Design 5 items
- Hiperfire 13 items
- HUXWRX 2 items
- Icarus Precision 2 items
- Icon Defense 5 items
- Iron City Rifle Works 1 item
- Jacob Grey 2 items
- James Madison Tactical (JMT) 2 items
- JK Armament 11 items
- JL Billet 5 items
- JMAC Customs 63 items
- JP Enterprises Inc 42 items
- KAK Industries 1 item
- Killer Innovations 1 item
- Kinetic Development Group 4 items
- Knight’s Armament Company (KAC) 4 items
- KNS Precision 12 items
- Kaw Valley Precision 2 items
- Kratos Design Group 3 items
- Krebs Customs 4 items
- KynSHOT 3 items
- Lantac 14 items
- Lewis Machine & Tool (LMT) 17 items
- LUTH-AR 2 items
- Mad Pig 4 items
- Magpul Industries 64 items
- Matador Arms 1 item
- Maxim Defense 16 items
- Mega Arms 1 item
- Midwest Industries 16 items
- Mission First Tactical 3 items
- Multitasker Tools 1 item
- NEMO Arms 4 items
- Neverwear Springs 1 item
- Next Level Armament 19 items
- NIGHT FISION 1 item
- Noveske 31 items
- Odin Works 1 item
- Patriot Ordnance Factory (POF) 5 items
- Precision Armament 13 items
- Precision Reflex Inc 2 items
- Primary Weapon Systems 10 items
- Q, LLC 9 items
- Quarter Circle 10 8 items
- R&D Precision 4 items
- Radian Weapons 13 items
- Rainier Arms, LLC 203 items
- Rainier Industries 16 items
- Rehv Arms 2 items
- Reptilia Corp 4 items
- Rex Silentium 1 item
- Riflespeed 3 items
- Rise Armament 19 items
- ROAM Rifles 4 items
- RogueOps 3 items
- RS Regulate 5 items
- Samson Manufacturing Corp. 2 items
- SB Tactical 8 items
- SCALARWORKS 1 item
- Seekins Precision 1 item
- Sharps Bros 18 items
- Shooting Innovations 2 items
- Sig Sauer 7 items
- Silencerco 6 items
- Sionics Weapon Systems 1 item
- SLR Rifleworks 3 items
- Sons of Liberty Gun Works 36 items
- Spinta Precision 3 items
- Sprinco (Tactical Springs) 7 items
- Stag Arms 1 item
- Stern Defense 11 items
- Strike Industries 30 items
- Superlative Arms 13 items
- Surefire 6 items
- Tactical Edge Arms 3 items
- Tango Down 1 item
- Timney Triggers 28 items
- Tippmann Arms 1 item
- Torrent Suppressors 3 items
- Triggertech 10 items
- TruCalibre 5 items
- True North Concepts 7 items
- Tyrant Designs 12 items
- Underground Tactical 1 item
- Unity Tactical 1 item
- V Seven Weapon Systems 29 items
- VLTOR 10 items
- White Label Armory 2 items
- WMD Guns 10 items
- WOOX 4 items
Model
Option
- AK-47/74 9 items
- AR-9 6 items
- AR-10 29 items
- AR-15 160 items
- Standard 2 items
- 4.720" 2 items
- 6.295" 2 items
- 7.870" 2 items
- 9.445" 2 items
- Bull's Eye 1 item
- Vertical Lines 1 item
- Minimal 1 item
- H2 Buffer 2 items
- White - Standard Power 1 item
- Blue - Enhanced Power 1 item
- Red - Extra Power 1 item
- Orange - Extra Extra Power 1 item
- Yellow - Reduced Power 1 item
- White/Red - Intermediate Power 1 item
- Green - Rifle Length Standard Power 1 item
- Long 1 item
- Front 1 item
- Mid 1 item
- Rear 1 item
- Remington 700 Short Action 3 items
- Remington 700 Short Action BDL 1 item
- WA 1 item
- KS 1 item
- JP Silent Captured Spring - Standard 1 item
- JP Silent Captured Spring - Heavy 1 item
- JP Silent Captured Spring - 9mm 1 item
- Buffer & Spring - Standard 3 items
- Buffer & Spring - 9mm 2 items
- Buffer & Spring - H1 3 items
- Buffer & Spring - H2 2 items
- Buffer & Spring - H3 2 items
- Heavy 1 item
- 1.125-28 TPI 3 Lug/Booster Adaptor 1 item
- 1.180-24 TPI 3 Lug/Booster Adaptor 1 item
- 9mm 1 item
- CZ 16 items
- FNH 1 item
- Heckler & Koch 1 item
- Remington 1 item
- Sharps Bros 1 item
- Sig Sauer 2 items
- Springfield 1 item
- Holed 1 item
- Profile 1 item
- Small Lever 2 items
- Large Lever 1 item
- Green Laser 1 item
- Adjustable 11 items
- Non-Adjustable 18 items
- B&T APC 1 item
- Dimpled 4 items
- Serrated 5 items
Platform
- 10-22 1 item
- AR-9 3 items
- AR-10/LR308 66 items
- AR-15 281 items
- AK47/74 14 items
- CZ 18 items
- FNH 3 items
- H&K 3 items
- IWI 1 item
- Remington 2 items
- Remington 700 7 items
- Ruger 2 items
- Ruger 10/22 2 items
- Ruger Precision Rifle 11 items
- Savage Small Shank 6 items
- Sig Sauer 11 items
- Sig Cross 4 items
- Springfield 1 item
- Steyr Aug 2 items
Price
Product Type
- 10/22 Barrel 3 items
- 10/22 Receiver 1 item
- Accessory 5 items
- Adapter Plate 2 items
- AK Accessories 1 item
- Angled Grip 17 items
- AR-10/LR308 Barrel 54 items
- AR-10 / LR 308 Charging Handle 4 items
- AR-10 Complete Lower Receiver 1 item
- AR-10 Handguard 2 items
- AR-10 Receiver Set 3 items
- AR-10 Stripped Lower Receiver 2 items
- AR-10 Stripped Upper Receiver 1 item
- AR-15 Assembled Upper Receiver 4 items
- AR-15 Barrel 186 items
- AR-15 Charging Handle 29 items
- AR-15 Complete Lower Receiver 13 items
- AR-15 Complete Upper Receiver 8 items
- AR-15 Partial Upper Receiver 22 items
- AR-15 Handguard 60 items
- AR-15 Receiver Set 13 items
- AR-15 Rifle 1 item
- AR-15 Stripped Lower Receiver 32 items
- AR-15 Stripped Upper Receiver 19 items
- AR-9 Lower Receiver 1 item
- AR-9 Complete Lower Receiver 1 item
- AR-9 Receiver Set 3 items
- AR-9 Upper Receiver 7 items
- Barrel Adapter 2 items
- Barrel Nut 1 item
- Blast Shield 2 items
- Bolt 14 items
- Bolt-Action Barrel 33 items
- Bolt-Action Receiver 1 item
- Bolt Carrier Group 34 items
- Bolt Catch 17 items
- Brace 25 items
- Buffer 26 items
- Buffer Kit 10 items
- Buffer Spring 16 items
- Buffer Tube 12 items
- Cam Pin 5 items
- Castle Nut 5 items
- Castle Nut / End Plate 6 items
- Cable Clip 1 item
- Charging Handle 34 items
- Chassis 20 items
- Cheek Riser 4 items
- Compensator 44 items
- Complete Upper 1 item
- Crush Washer 3 items
- Dust Cover 13 items
- End Cap 7 items
- End Plate 15 items
- Failure Resistant Extractor 2 items
- Finger Stop 2 items
- Firing Pin 3 items
- Flash Hider 52 items
- Forearm Accesory 14 items
- Forward Assist 6 items
- Forward Assist Spring 1 item
- Front Sight 1 item
- Gas Block 35 items
- Gas Rings 3 items
- Gas Tube 5 items
- Grip Accessory 10 items
- Grip Module 1 item
- Grip Screw 1 item
- Handguard 51 items
- Handguard Adaptor 2 items
- Handstop 35 items
- Iron Sight 1 item
- Key Screw 1 item
- Lower Parts Kit 15 items
- Lower Receiver 1 item
- Magazine 1 item
- Magazine Button 2 items
- Magazine Catch 9 items
- Magazine Release 15 items
- Magazine Spring 1 item
- Magwell 6 items
- Muzzle Brake 68 items
- Muzzle Device Accessory 11 items
- Partial Upper Receiver 1 item
- Parts Kit 11 items
- Pistol Grip 56 items
- Pistol Part 1 item
- Piston 1 item
- Piston System 6 items
- Port Door 5 items
- Port Door Rod 2 items
- Port Door Spring 1 item
- Rail Adapter 6 items
- Rail Panel 13 items
- Rail Section 1 item
- Recoil Spring 2 items
- Retainer Pin 3 items
- Roll Pin 2 items
- Safety Selector 31 items
- Shim Set 3 items
- Sight Post 13 items
- Silent Captured Spring 2 items
- Spring 8 items
- Steyr Aug Barrel 2 items
- Stock 76 items
- Stock Accessory 18 items
- Stock Adapter 25 items
- Suppressor Accessory 1 item
- Take Down / Pivot Pins 16 items
- Trigger 101 items
- Trigger / Hammer Pins 3 items
- Trigger Guard 14 items
- Upper Parts Kit 2 items
- Vertical Grip 21 items
- Weight 1 item
Rail Length
- 3.25" 1 item
- 4" 1 item
- 4.25" 4 items
- 4.5" 2 items
- 4.9" 1 item
- 5" 1 item
- 5.5" 1 item
- 5.99" 1 item
- 6.0" 5 items
- 6.25" 2 items
- 6.375" 1 item
- 6.5" 2 items
- 6.7" 5 items
- 6.75" 3 items
- 7" 11 items
- 7.2" 1 item
- 7.25" 1 item
- 7.3" 1 item
- 7.5" 2 items
- 7.8" 1 item
- 7.9" 1 item
- 8" 4 items
- 8.5" 1 item
- 8.6" 1 item
- 9" 9 items
- 9.1" 1 item
- 9.15" 2 items
- 9.2" 2 items
- 9.25" 1 item
- 9.3" 1 item
- 9.5" 13 items
- 9.55" 6 items
- 9.59" 1 item
- 9.6" 5 items
- 9.75" 1 item
- 10" 18 items
- 10.3" 1 item
- 10.5" 10 items
- 10.64" 2 items
- 10.7" 3 items
- 10.75" 1 item
- 11" 4 items
- 11.1" 1 item
- 11.25" 1 item
- 11.5" 8 items
- 11.7" 3 items
- 11.75" 2 items
- 11.8" 4 items
- 12" 18 items
- 12.3" 1 item
- 12.4" 2 items
- 12.43" 1 item
- 12.5" 10 items
- 12.55" 1 item
- 12.6" 3 items
- 12.8" 1 item
- 13" 10 items
- 13.25" 2 items
- 13.5" 11 items
- 13.6" 4 items
- 13.625" 1 item
- 13.7" 4 items
- 13.75" 1 item
- 13.8" 5 items
- 14" 6 items
- 14.3" 1 item
- 15" 33 items
- 15.25" 1 item
- 15.3" 5 items
- 15.5" 1 item
- 16.3" 1 item
- 16.5" 4 items
- 17" 2 items
- 18" 1 item
Size
Thread Pitch
Twist Rate
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