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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Strike Industries ISOTAB Charging Handle Extension - BlackSpecial Price $10.92 Regular Price $15.95
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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
- 9.75" 1 item
- 10" 3 items
- 10.3" 12 items
- 10.5" 32 items
- 10.7" 4 items
- 11.5" 11 items
- 11.85" 1 item
- 12" 3 items
- 12.3" 1 item
- 12.5" 14 items
- 13" 2 items
- 13.5" 1 item
- 13.7" 5 items
- 13.9" 4 items
- 14.5" 27 items
- 16" 80 items
- 16.1" 6 items
- 16.3" 1 item
- 17" 1 item
- 18" 58 items
- 20" 22 items
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- 22" 16 items
- 24" 7 items
- 26" 4 items
Caliber
- .22 ARC 2 items
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- .223/5.56 17 items
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- .223 Wylde 39 items
- .30 Cal 9 items
- .308 10 items
- .308 Win 36 items
- .357 Magnum 2 items
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- .45 ACP 4 items
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- 12 Gauge 1 item
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- 338 Lapua 2 items
- 5.56X45 4 items
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- 5.56mm 9 items
- 6mm ARC 13 items
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- 6.5 Grendel 13 items
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- 6.8 SPC 2 items
- 6MM Creedmoor 9 items
- 7.62mm 3 items
- 7.62x39 9 items
- 7.62x51 7 items
- 8.6 Blackout 4 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 17 items
- Flaming Pig 1 item
- Flat 20 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 70 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 4 items
- Armaspec 2 items
- Arms Republic 7 items
- Ascalon Arms 7 items
- Brügger & Thomet (B&T) 2 items
- B5 Systems 12 items
- Ballistic Advantage 16 items
- Battle Arms Development 19 items
- Blackout Defense 1 item
- Black River MFG 1 item
- Blitzkrieg Components 12 items
- BOBRO 1 item
- Bootleg 2 items
- Boss Barrels 10 items
- Bravo Company MFG (BCM) 51 items
- Brigand Arms 2 items
- Centurion Arms 14 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
- 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 49 items
- Forward Controls Design 84 items
- FosTecH 1 item
- Gear Head Works 5 items
- Geissele 18 items
- Grand Power 2 items
- Grey Birch MFG 7 items
- Grey Ghost Precision 1 item
- Griffin Armament 16 items
- Half Cocked Arms (HCA) 1 item
- HB Industries 19 items
- HERA ARMS 16 items
- Heresy Design 7 items
- Hiperfire 15 items
- HUXWRX 1 item
- 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 65 items
- JP Enterprises Inc 27 items
- KAK Industries 1 item
- Killer Innovations 1 item
- Kinetic Development Group 4 items
- Knight’s Armament Company (KAC) 5 items
- KNS Precision 9 items
- Kaw Valley Precision 2 items
- Kratos Design Group 3 items
- Krebs Customs 5 items
- KynSHOT 5 items
- Lantac 11 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 23 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) 9 items
- Precision Armament 11 items
- Primary Weapon Systems 15 items
- Q, LLC 11 items
- Quarter Circle 10 8 items
- R&D Precision 4 items
- Radian Weapons 11 items
- Rainier Arms, LLC 197 items
- Rainier Industries 17 items
- Rehv Arms 1 item
- Reptilia Corp 4 items
- Rex Silentium 1 item
- Riflespeed 3 items
- Rise Armament 17 items
- ROAM Rifles 4 items
- RogueOps 3 items
- RS Regulate 5 items
- SB Tactical 6 items
- SCALARWORKS 1 item
- Seekins Precision 2 items
- Sharps Bros 21 items
- Shooting Innovations 2 items
- Sig Sauer 4 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 32 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 7 items
- TruCalibre 6 items
- True North Concepts 7 items
- Tyrant Designs 12 items
- Underground Tactical 1 item
- Unity Tactical 1 item
- V Seven Weapon Systems 35 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-15 153 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 4 items
- AR-10/LR308 63 items
- AR-15 272 items
- AK47/74 10 items
- CZ 21 items
- FNH 3 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 8 items
- Sig Sauer 10 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 182 items
- AR-15 Charging Handle 27 items
- AR-15 Complete Lower Receiver 12 items
- AR-15 Complete Upper Receiver 30 items
- AR-15 Partial Upper Receiver 25 items
- AR-15 Handguard 51 items
- AR-15 Receiver Set 13 items
- AR-15 Rifle 1 item
- AR-15 Stripped Lower Receiver 28 items
- AR-15 Stripped Upper Receiver 19 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 3 items
- Blast Shield 2 items
- Bolt 9 items
- Bolt-Action Barrel 37 items
- Bolt-Action Receiver 1 item
- Bolt Carrier Group 29 items
- Bolt Catch 21 items
- Brace 19 items
- Buffer 23 items
- Buffer Kit 8 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 48 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 1 item
- Firing Pin 3 items
- Flash Hider 49 items
- Forearm Accesory 15 items
- Forward Assist 6 items
- Forward Assist Spring 1 item
- Front Sight 2 items
- Gas Block 33 items
- Gas Rings 3 items
- Gas Tube 4 items
- Grip Accessory 9 items
- Grip Module 1 item
- Grip Screw 1 item
- Handguard 50 items
- Handguard Adaptor 2 items
- Handstop 31 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 68 items
- Muzzle Device Accessory 15 items
- Partial Upper Receiver 1 item
- Parts Kit 12 items
- Pistol Grip 57 items
- Pistol Part 1 item
- Piston 1 item
- Piston System 7 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 28 items
- Shim Set 3 items
- Sight Post 12 items
- Silent Captured Spring 2 items
- Spring 8 items
- Steyr Aug Barrel 4 items
- Stock 74 items
- Stock Accessory 17 items
- Stock Adapter 22 items
- Suppressor 1 item
- Suppressor Accessory 1 item
- Take Down / Pivot Pins 15 items
- Trigger 101 items
- Trigger / Hammer Pins 3 items
- Trigger Guard 15 items
- Upper Parts Kit 2 items
- Vertical Grip 23 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" 13 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" 8 items
- 9.1" 1 item
- 9.2" 2 items
- 9.25" 1 item
- 9.3" 1 item
- 9.5" 17 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" 1 item
- 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" 20 items
- 12.3" 1 item
- 12.4" 1 item
- 12.43" 1 item
- 12.5" 10 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" 9 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" 34 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
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