Firearms
Rainier Arms provide a large choice of rifles, shotguns, handguns, Bolt Action, AK rifles, and AR pistols. Find, compare, and shop your favorite. In our offer, you can find firearms from manufacturers like Daniel Defense, Kalashnikov USA, Nighthawk Custom, and many many more. In case you run out of ammo, you can browse and purchase ammo for your firearm.

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Wilson Combat WCP320 Full 9mm Pistol w/ Action Tuned Straight Trigger - Tan5.0 star rating 3 ReviewsSpecial Price $999.92 Regular Price $1,425.00
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Wilson Combat WCP320 Full 9mm Pistol w/ Action Tuned Straight Trigger - Black★ ReviewsPopup content startsclose Popup
These are real reviews
from real shoppers4.8 star rating 30612 Reviews- Site Reviews
- Product Reviews
Thank you for posting a review!We value your input. Share your review so everyone else can enjoy it too.Thank you for posting a review!Your review was sent successfully and is now waiting for our staff to publish it.Verified Reviewer0.0 star rating06/19/25RRyan O.Verified Buyer2.0 star rating06/17/25Not worth the money or the shipping fees to return kit.Review by Ryan O. on 17 Jun 2025 review stating Not worth the money or the shipping fees to return kit.After installing shifter kit, the paddle is very loose and I am NOT confident that the paddle will remain in place on the flashlight. Also, as is misleading in which side of the flashlight it goes on. I ordered the left side thinking it is for the left side of the flashlight when it is on the pistol in my hand. Apparently it is for the left side of the light when you are looking at the lense of the flashlight. Again, VERY misleading.On Emissary Development Paddle Shifter Kit for SureFire X300 - LeftSSebastian5.0 star rating06/17/25Thanks RainierArmsReview by Sebastian on 17 Jun 2025 review stating Thanks RainierArmsI was having trouble ordering this barrel with other companies quickly as I needed a replacement ASAP. Rainierarms was able to get me this barrel THE NEXT DAY!! Thank you guys so much!!! Will be shopping here for future piecesOn True Precision P365-FUSE 9mm Threaded Barrel 4.3"JJordan H.Verified Buyer5.0 star rating06/17/25Cut & thread/upper disassemblyReview by Jordan H. on 17 Jun 2025 review stating Cut & thread/upper disassemblyRainier did great work disassembling my pinned upper. They also cut and thread the barrel to move to a new pistol build and everything went great with quality workmanship. I would have them do any future needed gunsmithing.On Cut & ThreadingCClaytenVerified Reviewer2.0 star rating06/17/25Missing parts, repeated failures to replace them.Review by Clayten on 17 Jun 2025 review stating Missing parts, repeated failures to replace them.We sent a customers upper in for a pin and weld and a front sight service on a new barrel. The pin and weld went well but we were told they could not use the guns original front sight post on the new barrel. That's fine we purchased a new front sight post from Rainer and were told that everything would be moved over from our original. Once we received the upper back the front post had nothing installed and the original was not returned to us. Emailing the service team we were told the new front sight parts would be on the way with no mention of the other missing parts, three weeks later nothing at all. Emailing them again a new front sight set was sent out to us which we received. At this point the customer was unhappy enough with everyone that we just installed the missing parts out of our pocket to get it out the door.On A2 Front Sight Service - PinningJJeff R.Verified Buyer2.0 star rating06/17/25Maybe it will work for youReview by Jeff R. on 17 Jun 2025 review stating Maybe it will work for youDidn’t work for my application. Trying to get pistol to cycle with a silencer.On DPM Systems Technologies Mechanical Recoil Reduction System For Sig Sauer P365 3.1" - Soft Version$1,425.00 -
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Battle Arms Development Workhorse 5.56 NATO Pistol - 10.5" Anodized Black5.0 star rating 3 ReviewsSpecial Price $749.99 Regular Price $1,199.00
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Zev Technologies AR-15 Core Duty Rifle - 16"4.0 star rating 1 ReviewSpecial Price $999.92 Regular Price $1,564.00
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Shadow Systems MR920L Elite 9mm Pistol w/ Optic Cut - Black (DLC)Special Price $799.92 Regular Price $999.00
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Danger Close Armament CZ P-10C Silicon Carbide Signature 9mm Pistol - Sig Grey/TiNSpecial Price $699.99 Regular Price $1,024.00
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Danger Close Armament CZ P-10C Silicon Carbide Signature 9mm Pistol - Glock FDE/TiNSpecial Price $699.99 Regular Price $1,024.00
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Shopping Options
Barrel Length
- 2" 3 items
- 2.5" 1 item
- 2.75" 1 item
- 3.0" 11 items
- 3.1" 16 items
- 3.18" 1 item
- 3.25" 2 items
- 3.27" 1 item
- 3.3" 1 item
- 3.39" 1 item
- 3.41" 10 items
- 3.43" 1 item
- 3.5" 16 items
- 3.54" 1 item
- 3.6" 5 items
- 3.66" 1 item
- 3.7" 10 items
- 3.75" 2 items
- 3.8" 4 items
- 3.85" 4 items
- 3.9" 35 items
- 3.94" 1 item
- 4" 36 items
- 4.01" 1 item
- 4.02" 11 items
- 4.09" 2 items
- 4.1" 1 item
- 4.17" 6 items
- 4.20" 1 item
- 4.25" 60 items
- 4.3" 7 items
- 4.32" 1 item
- 4.4" 18 items
- 4.45" 2 items
- 4.46" 1 item
- 4.48" 2 items
- 4.49" 8 items
- 4.5" 19 items
- 4.53" 1 item
- 4.57" 1 item
- 4.6" 18 items
- 4.61" 1 item
- 4.7" 24 items
- 4.71" 1 item
- 4.78" 1 item
- 4.8" 13 items
- 4.89" 3 items
- 4.9" 4 items
- 4.925" 1 item
- 4.94" 1 item
- 5" 100 items
- 5.09" 1 item
- 5.1" 3 items
- 5.19" 2 items
- 5.2" 1 item
- 5.28" 2 items
- 5.3" 2 items
- 5.31" 2 items
- 5.4" 4 items
- 5.5" 11 items
- 5.51" 1 item
- 5.8" 3 items
- 5.87" 1 item
- 6" 9 items
- 6.5" 4 items
- 6.88" 2 items
- 7" 5 items
- 7.5" 3 items
- 7.72" 1 item
- 7.75" 3 items
- 7.8" 1 item
- 7.94" 1 item
- 8" 17 items
- 8.3" 3 items
- 8.5" 5 items
- 8.86" 2 items
- 8.9" 1 item
- 9" 3 items
- 9.5" 1 item
- 9.6" 1 item
- 9.75" 2 items
- 10" 2 items
- 10.3" 9 items
- 10.5" 14 items
- 11" 5 items
- 11.5" 12 items
- 11.75" 4 items
- 12" 3 items
- 12.5" 4 items
- 13" 5 items
- 13.7" 6 items
- 13.75" 2 items
- 13.9" 1 item
- 14" 1 item
- 14.17" 2 items
- 14.3" 1 item
- 14.5" 18 items
- 15.14" 1 item
- 16" 97 items
- 16.1" 11 items
- 16.17" 2 items
- 16.2" 1 item
- 16.25" 21 items
- 16.3" 5 items
- 16.33" 3 items
- 16.5" 28 items
- 17.4" 2 items
- 18" 23 items
- 18.43" 1 item
- 18.5" 32 items
- 19.1" 4 items
- 19.75" 1 item
- 20" 12 items
- 20.8" 1 item
- 22" 4 items
- 24" 10 items
- 26" 6 items
- 28" 3 items
Caliber
- .22 ARC 1 item
- .22 Cal 4 items
- .22 LR 37 items
- .22 WMR 1 item
- .223/5.56 2 items
- .223 Rem 1 item
- .223 Wylde 19 items
- .30-30 3 items
- .30 Cal 16 items
- .300 PRC 1 item
- .300 Win Mag 2 items
- .308 11 items
- .308 Win 13 items
- .32 ACP 1 item
- .338 1 item
- .357 Magnum 27 items
- .36 Cal 2 items
- .38/.357 Magnum 7 items
- .38 Special 1 item
- .380 ACP 2 items
- .380 Auto 2 items
- .40 S&W 1 item
- .410 1 item
- .44 Magnum 10 items
- .45-70 GOVT 1 item
- .45 ACP 39 items
- .45 Colt 6 items
- .46 Cal 1 item
- 10mm 12 items
- 12 Gauge 50 items
- .360 1 item
- 300 Blackout 26 items
- 300 Norma Mag 1 item
- 338 Lapua 1 item
- .460 1 item
- 45-70 Gov't 2 items
- 50 Cal 1 item
- 5.45x39 6 items
- 5.56X45 11 items
- 5.56 NATO 127 items
- 5.56mm 22 items
- 5.7x28mm 8 items
- 6mm ARC 8 items
- 6.5 Creedmoor 13 items
- 6.5 PRC 1 item
- 6.8x51 3 items
- 7.62mm 18 items
- 7.62x39 35 items
- 7.62x51 13 items
- 7mm-08 Rem 1 item
- 8.6 Blackout 8 items
- 9mm 522 items
Category
Configuration
Finish
Gas System
Magazine Capacity
Manufacturer
- 21st Tec 8 items
- Advanced Armament Company (AAC) 5 items
- Agency Arms 2 items
- Andro Corp Industries 1 item
- Angstadt Arms 3 items
- AREX Defense 11 items
- Arsenal 8 items
- Atlas Gunworks 11 items
- Brügger & Thomet (B&T) 14 items
- Battle Arms Development 4 items
- Benelli 24 items
- Beretta 26 items
- Black Rain Ordnance 12 items
- BOE Suppression 3 items
- Bravo Company MFG (BCM) 5 items
- Bul Armory 8 items
- Canik 7 items
- Centurion Arms 1 item
- Chiappa Firearms 9 items
- Christensen Arms 1 item
- Citadel 1 item
- Colt 19 items
- CZ-USA 30 items
- Dan Wesson 2 items
- Daniel Defense 19 items
- Danger Close Armament 19 items
- Dark Hour Defense 1 item
- Dead Air Armament 11 items
- Empire 4 items
- F-1 Firearms 2 items
- Faxon Firearms 3 items
- FNH USA 34 items
- FOR Systems 4 items
- FosTecH 2 items
- Foxtrot Mike 2 items
- Geissele 6 items
- Genesis Arms 4 items
- Global Ordnance 1 item
- Glock 29 items
- Grand Power 16 items
- Grey Birch MFG 4 items
- Grey Ghost Precision 3 items
- Griffin Armament 8 items
- Grit City Cerakote 1 item
- Heckler & Koch 39 items
- Henry 10 items
- HUXWRX 10 items
- IWI 14 items
- Jacob Grey 5 items
- JK Armament 9 items
- JMAC Customs 2 items
- JP Enterprises Inc 6 items
- Kalashnikov USA 1 item
- Kel-Tec 5 items
- Kimber 2 items
- Kings River Custom 3 items
- Knight’s Armament Company (KAC) 5 items
- Korth 1 item
- Kustomworx 4 items
- Laugo Arms 11 items
- Lewis Machine & Tool (LMT) 14 items
- Lone Wolf Arms 3 items
- M+M Industries 2 items
- Marlin 7 items
- MasterPiece Arms 8 items
- Matador Arms 2 items
- Maxim Defense 17 items
- Military Armament Corp. 1 item
- Modern Materiel 7 items
- Mossberg 1 item
- NEMO Arms 2 items
- Next Level Armament 5 items
- Nighthawk Custom 45 items
- Noveske 14 items
- OA Defense 28 items
- Patriot Ordnance Factory (POF) 17 items
- Phoenix Trinity 8 items
- Polymer80 3 items
- Primary Weapon Systems 15 items
- Pristine Technologies 1 item
- Q, LLC 24 items
- Quarter Circle 10 1 item
- Radian Weapons 2 items
- Radical Defense 19 items
- Rainier Arms, LLC 12 items
- Remington 3 items
- Replicator 3 items
- Richmond Tactical 4 items
- Riley Defense 14 items
- Rise Armament 2 items
- RogueOps 3 items
- Rossi 8 items
- Ruger 5 items
- Rugged Suppressors 6 items
- Shadow Systems 28 items
- Siege Suppressors 2 items
- Sig Sauer 132 items
- Silencerco 13 items
- Sionics Weapon Systems 1 item
- Smith & Wesson 5 items
- Sons of Liberty Gun Works 3 items
- Specters Cat 5 items
- Springfield Armory 21 items
- Staccato 52 items
- Stealth Arms 4 items
- Stoeger 15 items
- Surefire 5 items
- Taran Tactical Innovations 3 items
- Tippmann Arms 10 items
- Tisas USA 3 items
- Trailblazer Firearms 1 item
- Trinity Nevada 3 items
- True Precision 3 items
- Uberti 2 items
- V Seven Weapon Systems 9 items
- VKTR Industries 4 items
- Vudoo Gun Works 1 item
- Walther 16 items
- Wilson Combat 6 items
- Wolfpack Armory 2 items
- Zenith Firearms 4 items
- ZEV Technologies 1 item
Model
- 2K11 1 item
- Arex Delta 2 items
- Benelli Supernova 1 item
- Beretta 92X 2 items
- Beretta APX 1 item
- Beretta 1301 1 item
- CZ P-09 2 items
- CZ P-10 5 items
- FNH Five-Seven 1 item
- FNH Scar 1 item
- Glock 19 2 items
- Glock 19X 2 items
- Glock 20 1 item
- Glock 34 1 item
- Glock 43X 3 items
- Glock 44 1 item
- Glock 45 2 items
- Glock 48 1 item
- H&K P30 1 item
- Sig P220 5 items
- Sig P226 6 items
- Sig P229 5 items
- Sig P320 17 items
- Sig P365 8 items
- Sig P365X 2 items
- Sig P365XL 2 items
- Sig P365 X-Macro 1 item
- Sig MCX 10 items
- S&W M&P M2.0 1 item
- Springfield Hellcat 1 item
- Staccato 2011 14 items
- Staccato C2 2 items
- Staccato CS 1 item
- Staccato HD 3 items
- Stoeger STR-9 1 item
Optic Footprint
Option
Platform
- 1911 12 items
- AR-9 2 items
- AR-10/LR308 9 items
- AR-15 57 items
- AK47/74 13 items
- Benelli 5 items
- Beretta 11 items
- Canik 5 items
- CZ 12 items
- FNH 7 items
- Glock 15 items
- H&K 4 items
- Kimber 1 item
- Remington 1 item
- Sig Sauer 68 items
- Smith & Wesson 3 items
- Springfield 4 items
- Staccato 23 items
- Stoeger 1 item
- Walther 4 items
Product Type
- AK Pistol 7 items
- AK-47/74 Rifle 26 items
- AR Pistol 41 items
- AR-10 Rifle 25 items
- AR-15 Complete Upper Receiver 1 item
- AR-15 Rifle 120 items
- AR-9 Complete Lower Receiver 1 item
- AR-9 Pistol 1 item
- AR-9 Rifle 3 items
- Bolt-Action Receiver 2 items
- Bolt-Action Rifle 24 items
- Complete Upper 1 item
- Firearm 56 items
- Handgun 572 items
- Lever-Action Rifle 24 items
- Pistol Caliber Carbine 62 items
- Short-Barrel Rifle 34 items
- Shotgun 47 items
- Suppressor 131 items
Rail Length
- 4.5" 2 items
- 5.5" 1 item
- 6.0" 2 items
- 6.7" 1 item
- 7" 4 items
- 7.25" 1 item
- 9" 5 items
- 9.5" 2 items
- 9.75" 5 items
- 10" 1 item
- 10.5" 1 item
- 10.75" 1 item
- 11" 1 item
- 11.5" 1 item
- 11.7" 1 item
- 12" 7 items
- 12.5" 5 items
- 13" 5 items
- 13.5" 7 items
- 13.6" 1 item
- 14" 1 item
- 14.5" 4 items
- 15" 18 items
- 15.25" 1 item
- 16.5" 4 items
Size
Thread Pitch
Twist Rate
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