Shop By Brand
Best Sellers
Glock Switches & Select-Fire Kits
Authentic Glock auto switches, selector switches and conversion parts. Explore the most requested Texas inventory — fast shipping, expert support.
Polymer80 Frames, Lowers & Build Kits
Genuine Polymer80 80% pistol frames, AR-15 lower receivers, jig kits and complete builds. PF940, PF45, Rhino RL556 — everything a serious Texas builder needs.
Shop By Caliber
The calibers Texas shooters actually use — in stock, shipped from Houston.
Shop By Category
Six core categories covering everything Texas gun owners buy.
Handguns
Glock, M&P, Sig, Springfield, Ruger — carry, duty, defense.
Rifles
Bolt, lever, AR platform, rimfire trainers.
Shotguns
12/20 gauge pump, semi-auto, over-under.
Ammunition
Bulk handgun, rifle & shotshell from Hornady, Federal, Winchester.
AR-15 Parts
Uppers, lowers, BCGs, triggers, handguards.
Optics & Sights
Red dots, LPVOs, scopes, iron sights.
New Arrivals
Why CS Firearms
Licensed FFL
ATF-licensed Houston dealer — every transfer handled personally.
Fast Shipping
Same-day dispatch on orders before 2 PM CT.
Texas-Based Team
Email real humans, get real answers.
Straight Pricing
Match major online dealers. No fake sales.
Curated Inventory
Only firearms we’d recommend to a friend.
Secure Checkout
PCI-compliant, TLS 1.3, zero card data stored.
CS Firearms — Your Houston Online Firearms Dealer
CS Firearms is a licensed ATF FFL dealer in Houston, Texas, serving gun owners statewide and nationwide since 2018. We stock handguns from Glock, Smith & Wesson, Sig Sauer, Ruger and Springfield; rifles (AR-15, bolt action, lever action, rimfire); shotguns; ammunition in every common caliber; AR-15 parts; and optics from Holosun, Vortex and Sig. All firearm sales go through the standard ATF Form 4473 process via your local receiving FFL. Learn the FFL transfer process or read our FAQ.
Texas’s Trusted Source for Glock Switches, Polymer80 Frames & Firearms
CS Firearms serves Texas and the entire United States with an unmatched catalog of Glock auto switches, selector switches, and Polymer80 80% pistol frames. Whether you are searching for a genuine Polymer80 PF940v2, PF45 full-size frame, Rhino RL556 AR-15 lower, or a premium Glock switch for your G17, G19, G22, or G26, our inventory is curated from the most respected manufacturers in the industry. Every Glock switch is inspected for reliable function and consistent performance, and every Polymer80 frame kit ships with the correct jig, rails, and locking block hardware so you can complete your 80% build without hassle.
Beyond switches and Polymer80 parts, CS Firearms carries handguns, rifles, shotguns, AR-15 uppers, ammunition, optics, and tactical accessories from Glock, Sig Sauer, Smith & Wesson, Ruger, Springfield Armory, Daniel Defense, Knights Armament, Rock River Arms, and dozens more. Our Texas customers count on us for competitive pricing, discreet packaging, and shipping to all 50 states where legal. Questions about a Glock switch compatibility, Polymer80 jig fitment, or FFL transfer options? Our firearms experts have decades of combined experience and are standing by via live chat, phone, or email to help you build, buy, and shoot with confidence. From Houston to every corner of Texas, CS Firearms remains the go-to online destination for serious shooters and builders.