Custom AR-9 (Build From Scratch)
Blank-slate AR-9/PCC platform for selecting a lower, upper/bolt setup, magazine pattern, and 9mm core parts.
- Price
- $900
- Calibers
- 9mm
- Rail
- mlok
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Key Highlights
- •Use a dedicated 9mm lower, a Glock or Colt adapter, or an AR-15 conversion magazine
- •Pick the 9mm lower and upper/bolt setup before accessories
- •Unlocks PCC suppressors, 9mm muzzle devices, and 9mm ammunition after the core build
More PCC guides & articles
Guides
Overview
This blank-slate PCC builder is for planning an AR-9 instead of buying one factory firearm. Choose the lower, magazine setup, upper, and operating system first. Then match the bolt, barrel, recoil system, trigger, muzzle device, optic, light, and suppressor to those core parts.
Key Features
- Build-planning template rather than a buyable firearm SKU
- The chosen lower, adapter, upper, and bolt determine whether Glock, Colt-pattern, CMMG ARC, or MEAN conversion magazines fit
- Direct-blowback, radial-delayed, and other 9mm AR operating systems can be modeled through the selected core parts
- AR trigger compatibility depends on bolt geometry and manufacturer guidance
Capability Profile
0-10 Scale Across 8 Axes
Pros
- +Maximum control over magazine pattern, barrel length, trigger, optic, muzzle, and suppressor setup
- +Lets builders compare Glock-pattern value builds against more specialized delayed systems
- +Useful for modeling parts compatibility before buying receivers or upper assemblies
Cons
- −Not a ready-to-buy firearm
- −Reliability depends heavily on bolt, buffer, barrel feed cone, magazine, and ejector geometry
- −Final legal configuration depends on barrel length, brace/stock choice, and local rules
Detailed Specifications
- caliber
- 9mm
- platform
- AR-pattern pistol-caliber carbine build template
- operatingSystem
- Direct blowback baseline; delayed systems depend on chosen upper/bolt package
- magazineCompatibility
- Glock, Colt-pattern, CMMG ARC, or MEAN EndoMag/ExoMag depending on the lower, adapter, and upper system
- triggerCompatibility
- AR-pattern fire control compatibility depends on bolt and manufacturer guidance
- priceModel
- Mid-tier core build estimate before optic, light, suppressor, magazines, and accessories
Video Reviews
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Configure This Platform
Add optics, lights, and accessories to build your perfect Custom AR-9 (Build From Scratch).