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Zaffiri Precision Z Series Custom Slide & Side Ported Barrel Combo Kit - Fits Glock 19 Gen 3 - Matte Black Cerakote, RMR Cut, Blacked Out Co-Witness Sights & UPK - CU-G19G3-ZP-RMR-BLK-SP-BN-BLNK
Product Description
Upgrading a classic Glock 19 Generation 3 frame, custom Polymer80 compact build, or dedicated match-grade sidearm for high-velocity tracking reveals an immediate mechanical bottleneck: heavy, plain factory original equipment manufacturer (OEM) slide limits. Standard slides lack aggressive slide manipulation textures, carry standard plastic sights that break under hard bench strain, and require expensive custom machining just to host a modern miniature reflex red dot. Furthermore, standard barrel setups do nothing to combat muzzle flip during rapid strings of fire. The **Zaffiri Precision® Z Series Custom Slide and Side Ported Barrel Combo Kit (CU-G19G3-ZP-RMR-BLK-SP-BN-BLNK)** completely shatters these build limitations, packaging a race-ready, weight-optimized slide, a matching gas-venting side-ported barrel, high-performance co-witness sights, and a complete internal upper components group into a single drop-in workbench suite.
Precision-machined in the United States from premium, domestic **17-4 PH stainless steel billet**, the foundation of the Z Series slide balances uncompromising structural core longevity with advanced slide velocity tracking. The custom slide layout incorporates strategic geometric weight-reducing window cutouts along the front and sides that lighten the reciprocating mass, flattening out your cycling feel while speeding up slide timing loop transitions. The exterior surface armor is treated with a uniform, high-grade **Armor Black Cerakote H-Series ceramic jacket**, a baked-on shield that actively repels trail moisture, carbon fouling, and harsh chemical bore solvents on your armorer's bench. The slide features an aggressive **Trijicon RMR footprint optic cut**, milled directly into the steel with precision index bosses to provide an unyielding, low-profile seat for elite reflex sights.
The technical crown jewel of this Zaffiri builder assembly is its matched **Side Ported Match-Grade Barrel**. Machined from ordnance-grade **416R stainless steel**, this high-accuracy barrel features dual side gas port channels cut through the sides of the barrel crown and aligned flawlessly with the slide's front side windows. As high-velocity gunpowder gases expand behind the bullet, the specialized directional exhaust force acts like a rocket engine expansion chamber, physically driving your muzzle flat to drastically reduce muzzle flip and slash split times on target. Delivered fully kitted with pre-installed **blacked-out co-witness height iron sights** for clean optical alignment and a premium **complete Upper Parts Kit (UPK)**, this American-made hardware transformation brings pure tactical tracking authority straight to your firearm layout.
*Armorer Bench Notes & Technical Field Assembly Guidance: This Zaffiri Precision premium upgrade package arrives with a stripped slide, a drop-in ported barrel, pre-fit iron sights, and a separate complete internal upper parts kit on your workbench. CRITICAL INTERNAL ASSEMBLY & TORQUE INSTRUCTIONS: When building out the internal channels of your Z Series slide, ensure the plastic channel liner is pushed completely home using a specialized seating tool before inserting your striker assembly. Slide the extractor plunger guide rod assembly into position with the metal tip facing *forward* against the extractor back and the plastic cap facing *rearward* against the backplate. When bolting your Trijicon RMR or Holosun 507C reflex optic into the milled slide interface, choose the correct length mounting screws; utilizing a screw that is too long on the right-hand side will travel straight down into the extractor plunger channel, binding up your extractor guide rod and locking up your feeding cycle. **Armorer Pro-Tip:** Torque your optic screws incrementally to exactly **15 in-lbs** using a drop of removable blue threadlocker, and ensure your recoil guide rod is lightly treated with a synthetic gun lubricant to guarantee smooth cycling splits right from the first drop.*
Key Features
- Monolithic 17-4 Stainless Steel Slide: Precision CNC-machined from 17-4 PH billet stainless steel with geometric weight-reduction windows to ensure ultra-fast slide tracking velocities.
- Muzzle-Flattening Side Ported Barrel: Custom 416R stainless steel match barrel vents expanding gas sideways through integrated ports, physically arresting muzzle flip for rapid follow-up indexing.
- Premium Armor Black Cerakote: Coated in a rugged ceramic hard jacket that shrugs off abrasive holster slide wear, salt-sweat exposure, and harsh carbon-cleaning solvents.
- Direct-Read Trijicon RMR Optic Cut: Milled with a low-profile RMR footprint to provide a solid-state mounting anchor for industry-standard micro red dot electronics.
- Pre-Installed Co-Witness Height Sights: Features tall, blacked-out suppressor-height iron sights that sit perfectly within the lower third of your red dot window for immediate optical backup safety.
- Complete Upper Parts Kit (UPK): Ships complete with a factory-calibrated internal parts pack (firing pin, safety plunger, extractor, spring sets, backplate, and guide rod assembly) for a seamless workbench overhaul.
Product Specifications
- Brand: Zaffiri Precision
- Model Line: Z Series Custom Slide & Barrel Complete Combo Assemblies
- MPN/SKU: CU-G19G3-ZP-RMR-BLK-SP-BN-BLNK
- UPC Code Profile: 810220066652
- Firearm Model Fitment: Glock 19 Generation 3 (Gen 3 Exclusively) / Compatible Polymer80 PF940C Builds
- Slide Material Base: 17-4 PH Billet Stainless Steel
- Slide Design Motif: Z Series with Aggressive Front/Rear Serrations & Side Weight Windows
- Optic Interface Blueprint: Trijicon RMR Footprint / Holosun 507C Native Layout
- Barrel Material Construction: 416R Ordnance-Grade Stainless Steel
- Barrel Porting Array: Matched Side Ported Gas Vent Extraction Port System
- Rifling Twist Profile: 1:10 Right-Hand Twist Rate (Match Grade Precision)
- Chassis Exterior Shield: Matte Armor Black H-Series Cerakote Ceramic Coat
- Sight Configuration: Blacked Out Suppressor/Co-Witness Height Sight Set (Installed)
- Internal Parts Inclusion: Includes Complete Premium AR-Style Upper Parts Kit (UPK) with Guide Rod
- Product Type Category: Handgun Upgrade Parts / Completed Upper Configuration
- Net Upper Assembly Weight: Optimized Lightweight Kinetic Mass System
- Country of Manufacture: United States of America
