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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Battle Arms Development Workhorse 5.56 NATO Pistol - 10.5" Anodized Black★ ReviewsPopup content startsclose Popup
These are real reviews
from real shoppers4.8 star rating 30579 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 rating05/25/25SShay S.Verified Buyer5.0 star rating05/24/25It worksReview by Shay S. on 24 May 2025 review stating It worksIt's slightly longer than I was expecting but still dose the job. Drop it in Shadow Systems DR920 and put my hux9kti and run flawless.On Agency Arms Mid Line Fluted/Threaded Barrel For Glock 17 Gen 5RRafael F.Verified Buyer5.0 star rating05/24/25A must have!!!Review by Rafael F. on 24 May 2025 review stating A must have!!!Unfortunately, seems like they won’t be available or are produced in small numbers. It did come with a couple of scratches, but I still decided to give it five stars because it does what it supposed to.On Rainier Arms MARS (Magazine Advanced Release System) for Glock Gen 1-3JJMW999Verified Buyer4.0 star rating05/24/25Noticeably Less Recoil, Better Quality Than StockReview by JMW999 on 24 May 2025 review stating Noticeably Less Recoil, Better Quality Than StockWhile this spring system is probably not going to be equivalent to having your pistol ported and comped, I found the difference between the stock spring system and this one to be clearly noticeable with respect to felt recoil.
My one criticism is that once you get the package, the springs are not clearly labeled. However, you can figure things out by looking online and lining up the springs.
I started with one of the medium springs and then changed things out to the longest one. Reliability is not affected at all from what I can tell using a variety of ammo, both HP and FMJ.
One extra benefit of this system is that for me it makes the gun easier to re-assemble after field stripping and cleaning. The color contrast make it it easier to line up the guide rod precisely which is a somewhat common problem people have when re-assembling the 80X.
Overall I am happy with the purchase and would consider purchasing another DPM system for a different firearm in the future.On DPM Systems Technologies Mechanical Recoil Reduction System - Beretta 80x CheetahNNelson B.Verified Buyer5.0 star rating05/24/25Excelente!!Review by Nelson B. on 24 May 2025 review stating Excelente!!Excelente!!
Cómodo y agradable a la mano y se ve muy bien!On Edgar Sherman Design EFG Enhanced Picatinny Foregrip - BlackJJeffrey C.Verified Buyer5.0 star rating05/24/25Excellent, flawless operation for myReview by Jeffrey C. on 24 May 2025 review stating Excellent, flawless operation for myExcellent, flawless operation for my 6mm ARC build.On JP Enterprises 6.5 Grendel Enhanced Bolt Assembly Completion Group - DLCSpecial 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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CITADEL KATAC 12 Gauge Semi Auto Shotgun - 20"5.0 star rating 6 ReviewsSpecial Price $175.00 Regular Price $349.00
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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" 6 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" 59 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" 20 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" 105 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" 5 items
- 5.5" 12 items
- 5.51" 1 item
- 5.8" 2 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" 13 items
- 11" 5 items
- 11.5" 12 items
- 11.75" 4 items
- 12" 2 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" 17 items
- 15.14" 1 item
- 16" 96 items
- 16.1" 11 items
- 16.17" 2 items
- 16.2" 1 item
- 16.25" 20 items
- 16.3" 5 items
- 16.33" 3 items
- 16.5" 28 items
- 17.4" 2 items
- 18" 20 items
- 18.43" 1 item
- 18.5" 30 items
- 19.1" 4 items
- 19.75" 1 item
- 20" 12 items
- 20.8" 1 item
- 22" 6 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 17 items
- .300 PRC 1 item
- .300 Win Mag 2 items
- .308 11 items
- .308 Win 12 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 3 items
- .410 1 item
- .44 Magnum 10 items
- .45-70 GOVT 1 item
- .45 ACP 43 items
- .45 Colt 7 items
- .46 Cal 1 item
- 10mm 12 items
- 12 Gauge 47 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 126 items
- 5.56mm 22 items
- 5.7x28mm 8 items
- 6mm ARC 4 items
- 6.5 Creedmoor 15 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 7 items
- 9mm 526 items
Category
Configuration
Finish
Gas System
Magazine Capacity
Manufacturer
- 21st Tec 8 items
- Advanced Armament Company (AAC) 5 items
- Aero Precision 4 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 24 items
- Black Rain Ordnance 12 items
- BOE Suppression 3 items
- Bravo Company MFG (BCM) 5 items
- Bul Armory 21 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 3 items
- FosTecH 2 items
- Foxtrot Mike 2 items
- Geissele 1 item
- Genesis Arms 3 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 38 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 1 item
- Next Level Armament 5 items
- Nighthawk Custom 45 items
- Noveske 14 items
- OA Defense 27 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 23 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 30 items
- Siege Suppressors 2 items
- Sig Sauer 133 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 2 items
- Tippmann Arms 10 items
- Tisas USA 3 items
- Trailblazer Firearms 1 item
- Trinity Nevada 3 items
- True Precision 3 items
- Uberti 3 items
- V Seven Weapon Systems 8 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 15 items
- AR-9 2 items
- AR-10/LR308 10 items
- AR-15 53 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 114 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 26 items
- Complete Upper 1 item
- Firearm 56 items
- Handgun 586 items
- Lever-Action Rifle 24 items
- Pistol Caliber Carbine 61 items
- Short-Barrel Rifle 33 items
- Shotgun 44 items
- Suppressor 132 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" 6 items
- 13.6" 1 item
- 14" 1 item
- 14.5" 4 items
- 15" 17 items
- 15.25" 1 item
- 16.5" 1 item
Size
Thread Pitch
Twist Rate
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