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.
Dark mode is
-
Magpul MIAD/MOE AA/AAA Battery Storage Core - BlackSpecial Price $7.92 Regular Price $15.15
-
Mission First Tactical (MFT) Engage AR15 Pistol Grip - SDESpecial Price $10.92 Regular Price $19.99
-
Timney Triggers Scar 16 Single Stage Trigger - CurvedSpecial Price $249.92 Regular Price $352.95
-
Timney Triggers Scar 17 Single Stage Trigger - CurvedSpecial Price $364.99 Regular Price $438.99
-
Timney Triggers AR-15 Competition Trigger - 3lb Skeletonized CurvedSpecial Price $279.99 Regular Price $337.99
-
Timney Triggers AR-15 Competition Trigger - 4lb Skeletonized CurvedSpecial Price $279.99 Regular Price $337.99
Shop By
Shopping Options
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" 9 items
- 6" 8 items
- 6.5" 2 items
- 6.75" 1 item
- 7" 3 items
- 7.25" 1 item
- 7.5" 9 items
- 7.75" 2 items
- 8" 9 items
- 8.3" 1 item
- 8.5" 8 items
- 8.75" 1 item
- 9" 1 item
- 10" 3 items
- 10.3" 12 items
- 10.5" 32 items
- 10.7" 4 items
- 11.5" 11 items
- 12" 3 items
- 12.3" 1 item
- 12.5" 15 items
- 13" 2 items
- 13.5" 1 item
- 13.7" 6 items
- 13.9" 4 items
- 14.5" 28 items
- 16" 78 items
- 16.1" 6 items
- 16.3" 1 item
- 17" 1 item
- 18" 58 items
- 20" 23 items
- 20.5" 1 item
- 22" 16 items
- 24" 7 items
- 26" 4 items
Barrel Profile
Caliber
- .22 ARC 2 items
- .22 Cal 2 items
- .22 LR 4 items
- .223/5.56 17 items
- .223 Rem 1 item
- .223 Wylde 38 items
- .30 Cal 9 items
- .308 10 items
- .308 Win 36 items
- .357 Magnum 2 items
- .44/.45 2 items
- .45-70 GOVT 2 items
- .45 ACP 4 items
- .458 Socom 2 items
- 12 Gauge 1 item
- 300 Blackout 31 items
- 300 Norma Mag 1 item
- 338 Lapua 2 items
- 5.56X45 4 items
- 5.56 NATO 119 items
- 5.56mm 8 items
- 6mm ARC 15 items
- 6.5 Creedmoor 29 items
- 6.5 Grendel 13 items
- 6.5 PRC 2 items
- 6.8 SPC 2 items
- 6MM Creedmoor 9 items
- 7.62mm 4 items
- 7.62x39 9 items
- 7.62x51 8 items
- 8.6 Blackout 3 items
- 9mm 61 items
Category
Configuration
- 90 Degree 1 item
- AR-10 2 items
- AR-15 18 items
- Carbine 1 item
- Clamp on Piston Block 1 item
- Cross 1 item
- Curved 21 items
- Flaming Pig 1 item
- Flat 24 items
- Gen 1-3 1 item
- Gen 3 2 items
- GEN 2 1 item
- Ghetto Blaster 1 item
- M-LOK 8 items
- M4 Curve 1 item
- Mil-Spec 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 4 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
- Arid 1 item
- Bead Blast Stainless Steel 1 item
- Black 22 items
- Blue 1 item
- Case Hardened 1 item
- Carbon Fiber 6 items
- Cerakote 3 items
- DLC 3 items
- FDE 4 items
- Gold 1 item
- Grey 1 item
- Melonite 2 items
- NiB-X 3 items
- Nickel Boron 5 items
- Nitride 91 items
- Nitromet 6 items
- Phosphate 6 items
- Polished 37 items
- Red 4 items
- Satin 68 items
- Anodize 37 items
- Clear Hard Anodize 4 items
- PVD/CVD 1 item
- Quench Polish Quench (QPQ) 2 items
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 11 items
- 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 7 items
- Ascalon Arms 7 items
- Brügger & Thomet (B&T) 1 item
- B5 Systems 13 items
- Ballistic Advantage 21 items
- Battle Arms Development 17 items
- Blackout Defense 1 item
- Black River MFG 1 item
- Blitzkrieg Components 14 items
- BOBRO 1 item
- Bootleg 2 items
- Boss Barrels 10 items
- Bravo Company MFG (BCM) 53 items
- Brigand Arms 2 items
- Centurion Arms 13 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 17 items
- Dead Air Armament 6 items
- Dead Foot Arms LLC 8 items
- Devil Dog Concepts 1 item
- Die Free Co 1 item
- DPM Systems Technologies 4 items
- Drew Meyers Defense 7 items
- Driven Arms Co. 17 items
- Eartune 1 item
- Elftmann Tactical 5 items
- Emissary Development 3 items
- Ergo Grips 1 item
- F-1 Firearms 3 items
- F5 MFG 4 items
- Faxon Firearms 37 items
- Form Rifle 2 items
- Fortis MFG 48 items
- Forward Controls Design 83 items
- FosTecH 1 item
- Gear Head Works 5 items
- Geissele 20 items
- Grand Power 2 items
- Grey Birch MFG 7 items
- Grey Ghost Precision 1 item
- Griffin Armament 17 items
- Half Cocked Arms (HCA) 1 item
- HB Industries 18 items
- HERA ARMS 15 items
- Heresy Design 7 items
- Hiperfire 14 items
- HUXWRX 5 items
- Icarus Precision 2 items
- Icon Defense 6 items
- Iron City Rifle Works 1 item
- Jacob Grey 2 items
- James Madison Tactical (JMT) 2 items
- JK Armament 12 items
- JL Billet 5 items
- JMAC Customs 63 items
- JP Enterprises Inc 28 items
- KAK Industries 1 item
- Killer Innovations 1 item
- Kinetic Development Group 4 items
- Knight’s Armament Company (KAC) 3 items
- KNS Precision 14 items
- Kaw Valley Precision 2 items
- Kratos Design Group 3 items
- Krebs Customs 5 items
- KynSHOT 4 items
- Lantac 15 items
- Law Tactical 1 item
- Lewis Machine & Tool (LMT) 20 items
- LUTH-AR 2 items
- Mad Pig 5 items
- Magpul Industries 69 items
- Matador Arms 1 item
- Maxim Defense 28 items
- MCM Firearms 1 item
- Mega Arms 1 item
- Midwest Industries 15 items
- Mission First Tactical 3 items
- Multitasker Tools 1 item
- NEMO Arms 3 items
- Neverwear Springs 1 item
- Next Level Armament 21 items
- NIGHT FISION 1 item
- Noveske 27 items
- Odin Works 1 item
- Patriot Ordnance Factory (POF) 8 items
- Precision Armament 11 items
- Precision Reflex Inc 2 items
- Primary Weapon Systems 13 items
- Q, LLC 10 items
- Quarter Circle 10 8 items
- R&D Precision 4 items
- Radian Weapons 12 items
- Rainier Arms, LLC 194 items
- Rainier Industries 17 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. 1 item
- SB Tactical 6 items
- SCALARWORKS 1 item
- Seekins Precision 1 item
- Sharps Bros 21 items
- Shooting Innovations 2 items
- Sig Sauer 6 items
- Silencerco 6 items
- Sionics Weapon Systems 1 item
- SLR Rifleworks 3 items
- Sons of Liberty Gun Works 34 items
- Spinta Precision 3 items
- Sprinco (Tactical Springs) 7 items
- Stag Arms 1 item
- Stern Defense 8 items
- Strike Industries 31 items
- Superlative Arms 13 items
- Tactical Edge Arms 3 items
- Tango Down 1 item
- Timney Triggers 28 items
- Tippmann Arms 1 item
- Torrent Suppressors 3 items
- Triggertech 11 items
- TruCalibre 6 items
- True North Concepts 9 items
- Tyrant Designs 12 items
- Underground Tactical 1 item
- Unity Tactical 1 item
- V Seven Weapon Systems 33 items
- VKTR Industries 5 items
- VLTOR 10 items
- White Label Armory 2 items
- WMD Guns 11 items
- WOOX 5 items
Model
Option
- AK-47/74 9 items
- AR-9 4 items
- AR-10 34 items
- AR-15 157 items
- FN 509 1 item
- 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
- 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 18 items
- FNH 1 item
- Heckler & Koch 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 10 items
- Non-Adjustable 18 items
- B&T APC 1 item
- Dimpled 4 items
- Serrated 5 items
Platform
- 10-22 1 item
- AR-9 5 items
- AR-10/LR308 65 items
- AR-15 281 items
- AK47/74 11 items
- CZ 21 items
- FNH 4 items
- H&K 3 items
- IWI 1 item
- Remington 700 9 items
- Ruger 5 items
- Ruger 10/22 2 items
- Ruger Precision Rifle 11 items
- Savage Small Shank 7 items
- Sig Sauer 12 items
- Sig Cross 4 items
- Springfield 1 item
- Steyr Aug 4 items
Price
Product Type
- 10/22 Barrel 3 items
- 10/22 Receiver 1 item
- Accessory 5 items
- Adapter Plate 1 item
- AK Accessories 1 item
- Angled Grip 16 items
- Anti Walk Pins 2 items
- AR-10/LR308 Barrel 50 items
- AR-10 / LR 308 Charging Handle 5 items
- AR-10 Complete Lower Receiver 1 item
- AR-10 Complete Upper Receiver 1 item
- AR-10 Partial Upper Receiver 2 items
- AR-10 Handguard 2 items
- AR-10 Receiver Set 3 items
- AR-10 Stripped Lower Receiver 3 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 12 items
- AR-15 Complete Upper Receiver 28 items
- AR-15 Partial Upper Receiver 24 items
- AR-15 Handguard 53 items
- AR-15 Receiver Set 13 items
- AR-15 Rifle 1 item
- AR-15 Stripped Lower Receiver 27 items
- AR-15 Stripped Upper Receiver 18 items
- AR-9 Complete Lower Receiver 1 item
- AR-9 Partial Upper Receiver 1 item
- AR-9 Receiver Set 3 items
- AR-9 Upper Receiver 6 items
- Barrel Adapter 2 items
- Barrel Nut 1 item
- Blast Shield 2 items
- Bolt 11 items
- Bolt-Action Barrel 36 items
- Bolt-Action Receiver 1 item
- Bolt Carrier Group 30 items
- Bolt Catch 20 items
- Brace 23 items
- Buffer 27 items
- Buffer Kit 9 items
- Buffer Spring 11 items
- Buffer Tube 10 items
- Cam Pin 7 items
- Castle Nut 5 items
- Castle Nut / End Plate 6 items
- Cable Clip 1 item
- Charging Handle 34 items
- Chassis 25 items
- Cheek Riser 4 items
- Compensator 45 items
- Complete Upper 8 items
- 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 50 items
- Forearm Accesory 14 items
- Forward Assist 6 items
- Forward Assist Spring 1 item
- Front Sight 2 items
- Gas Block 35 items
- Gas Rings 3 items
- Gas Tube 4 items
- Grip Accessory 10 items
- Grip Module 1 item
- Grip Screw 1 item
- Handguard 52 items
- Handguard Adaptor 2 items
- Handstop 35 items
- Iron Sight 1 item
- Key Screw 1 item
- Lower Parts Kit 14 items
- Lower Receiver 1 item
- Magazine 1 item
- Magazine Button 2 items
- Magazine Catch 10 items
- Magazine Release 15 items
- Magazine Spring 1 item
- Magwell 6 items
- Muzzle Brake 70 items
- Muzzle Device Accessory 14 items
- Partial Upper Receiver 1 item
- Parts Kit 13 items
- Pistol Grip 57 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 Cover 1 item
- Rail Panel 13 items
- Rail Section 1 item
- Recoil Spring 1 item
- Retainer Pin 4 items
- Roll Pin 2 items
- Safety Selector 29 items
- Shim Set 3 items
- Sight Post 13 items
- Silent Captured Spring 2 items
- Spring 8 items
- Steyr Aug Barrel 4 items
- Stock 77 items
- Stock Accessory 16 items
- Stock Adapter 25 items
- Suppressor 1 item
- Take Down / Pivot Pins 16 items
- Trigger 103 items
- Trigger / Hammer Pins 2 items
- Trigger Guard 15 items
- Upper Parts Kit 2 items
- Vertical Grip 22 items
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" 4 items
- 6.75" 3 items
- 7" 12 items
- 7.25" 1 item
- 7.3" 1 item
- 7.5" 2 items
- 7.8" 1 item
- 7.9" 2 items
- 8" 4 items
- 8.5" 2 items
- 8.6" 1 item
- 9" 9 items
- 9.1" 1 item
- 9.2" 2 items
- 9.25" 1 item
- 9.3" 2 items
- 9.5" 16 items
- 9.55" 6 items
- 9.59" 1 item
- 9.6" 4 items
- 9.75" 1 item
- 10" 19 items
- 10.3" 1 item
- 10.5" 10 items
- 10.64" 2 items
- 10.7" 3 items
- 10.75" 1 item
- 10.8" 1 item
- 11" 4 items
- 11.25" 1 item
- 11.5" 8 items
- 11.7" 3 items
- 11.75" 2 items
- 11.8" 4 items
- 12" 21 items
- 12.3" 1 item
- 12.4" 1 item
- 12.43" 1 item
- 12.5" 11 items
- 12.55" 1 item
- 12.6" 3 items
- 12.75" 1 item
- 12.8" 1 item
- 13" 11 items
- 13.25" 2 items
- 13.5" 10 items
- 13.6" 4 items
- 13.625" 1 item
- 13.7" 4 items
- 13.75" 1 item
- 13.8" 5 items
- 14" 8 items
- 14.3" 1 item
- 15" 35 items
- 15.25" 1 item
- 15.3" 5 items
- 15.5" 1 item
- 15.8" 1 item
- 16.3" 1 item
- 16.5" 4 items
- 17" 2 items
- 18" 1 item
Size
Thread Pitch
Twist Rate
My Wish List