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.
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