Rise Armament Stripped Lower Receiver, Semi-automatic, 223 Remington/556NATO, Ambidextrous, Anodized Finish, Black RA-SL-223 RASL223

Rise Armament Stripped Lower Receiver – Semi-Automatic – .223 Rem/5.56 NATO – Ambidextrous Ready – Anodized Black (RA-SL-223 / RASL223) – UPC 850043415312 Build with confidence from the foundation up. The Rise Armament Stripped Lower Receiver is a premium AR-15–pattern lower engineered for .223 Remington / 5.56 NATO builds that demand clean geometry, tight tolerances, and a durable hard-anodized black finish. Whether you’re assembling a lightweight patrol carbine, a competition blaster, or a duty-ready defensive rifle, Model RA-SL-223 (RASL223), UPC 850043415312 delivers the quality machining and compatibility you want for a reliable, repeatable fit with standard AR parts. FFL Required: This is a serialized firearm component. Follow all federal, state, and local laws. Transfer must ship to a licensed FFL dealer. Why Choose Rise Armament for Your Next Build Precision-machined receiver: Built to AR-15 spec for consistent fitment with upper receivers, triggers, and buffer components—reducing wobble and improving perceived accuracy. Hard-anodized finish (Black): Durable Type III–style anodizing resists wear, corrosion, and solvents for long service life. Ambidextrous-friendly layout: Standard AR cutouts accept popular ambi safeties, mag releases, and bolt-release upgrades so right- and left-handed shooters can run the rifle their way. Clean, crisp lines: Uniform pocketing and de-burred edges support smooth assembly and a professional final look. Versatile caliber base: Optimized for .223 Rem / 5.56 NATO, with common compatibility across most AR-15 caliber conversions that use standard magazines (verify component fit and compliance). Key Identifiers Brand: Rise Armament Product: Stripped Lower Receiver (AR-15 pattern) Action Type: Semi-automatic (receiver) Caliber Compatibility: .223 Remington / 5.56 NATO (AR-15 platform) Finish/Color: Anodized Black Ambidextrous: Ambi-ready (accepts ambidextrous controls; parts sold separately) Model / SKU: RA-SL-223 / RASL223 UPC: 850043415312 Feature Highlights Mil-spec dimensions: Accepts standard lower parts kits, receiver extensions (carbine or rifle), and buffer systems. Tight upper fit: Precisely machined takedown/pivot pin holes help minimize upper–lower slop for a solid lockup. Flared magwell (model-dependent contouring): Aids faster reloads without compromising magazine retention. Marked safe/fire positions: Clear selector markings aid quick, confident manipulation under stress. Roll pin & detent pockets to spec: Streamline assembly and reduce risk of marring during install. Build Paths & Use Cases General-purpose carbine: Pair with a 16" 5.56 NATO upper, mid-length gas, and a two-point sling for a reliable all-around rifle. Competition ready: Add a match trigger, ambi controls, extended mag release, and a lightweight handguard for fast stages. Home defense / patrol: Choose duty-proven furniture, white light, and a red dot; set up controls for your handedness. Training/range rifle: Economical barrel/BCG combo and durable furniture for high round counts and drills. Compatibility Checklist Upper Receivers: AR-15 pattern uppers in .223/5.56 and many caliber variants (300 BLK, 6mm ARC, etc.) that use standard AR-15 lowers. Triggers: Single- or two-stage AR triggers (drop-in cassette or mil-spec LPK—verify pin size). Ambi controls: Popular ambi safeties, mag releases, and bolt catches (confirm model-specific fit). Receiver Extensions: Carbine or rifle tubes; buffer/spring weight to match your gas system and barrel length. Magazines: STANAG pattern 5.56 magazines (verify caliber-specific magazine requirements if converting). Always confirm individual component specs and torque values. Test reliability with your chosen ammo before duty or defensive use. Assembly Tips (High Level) Lay out a complete lower parts kit and quality punches/armorer’s tools. Install small detents and springs carefully to avoid loss or damage (work inside a clear bag if needed). Use proper grease/oil on pivot/takedown pins and trigger contact points per manufacturer guidance. Torque & stake receiver extension and castle nut (if applicable). Function check: Verify safety engagement, trigger reset, mag catch, and bolt catch before mating the upper. Specifications (At a Glance) Platform: AR-15 (stripped lower receiver) Material/Finish: Hard-anodized Black aluminum (rise-standard anodizing) Caliber Base: .223 Rem / 5.56 NATO Selector Marks: Safe / Fire Ambi Support: Accepts ambidextrous control upgrades Model: RA-SL-223 / RASL223 UPC: 850043415312 Compliance: Serialized firearm component; ships to FFL What’s in the Box Rise Armament Stripped Lower Receiver – Black (RA-SL-223 / RASL223) Manufacturer documentation (no parts kit, trigger, or receiver extension included) Compliance, Safety & Responsible Ownership Legal purchase & transfer: Must ship to an FFL. Follow all federal, state, and local laws on purchase, possession, and configuration. State capacity/feature laws: Confirm compliance for stocks, grips, muzzle devices, and magazine capacity before final assembly. Safe handling: Treat every firearm as loaded; keep the muzzle in a safe direction; finger off the trigger until sights are on target; know your target and what’s beyond. Secure storage: Store serialized components and completed builds responsibly—locked and out of unauthorized hands. SEO Highlights (Quick Scan) Rise Armament Stripped Lower Receiver for AR-15 .223 Rem / 5.56 NATO compatible, semi-automatic receiver Ambidextrous-ready, anodized black finish Model RA-SL-223 / RASL223, UPC 850043415312 Ideal base for duty, defense, competition, and range builds Suggested Meta Title Rise Armament Stripped Lower – AR-15, .223/5.56, Ambi-Ready, Anodized Black | RA-SL-223 | UPC 850043415312 Suggested Meta Description Build your next AR on a premium foundation. Rise Armament’s RA-SL-223 stripped lower features hard-anodized black finish, ambi-ready geometry, and mil-spec compatibility for .223/5.56 builds. Model RASL223, UPC 850043415312. Ships to FFL. The End