Radian Weapons A-DAC 15 Model 1 Complete Pistol Lower
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About this product
What is the Radian Weapons A-DAC 15 Model 1 Complete Pistol Lower?
The Radian Weapons A-DAC 15 Model 1 is a billet 7075-T6 aluminum AR-15-style pistol lower receiver engineered for precision compact builds with full ambidextrous controls. Built to exceed mil-spec standards, this lower incorporates patented A-DAC bolt catch technology and ships ready for SBA3 brace installation. As a foundation for Title II-compliant pistol or SBR configurations, it represents a significant upgrade over traditional forged receivers in both material integrity and operational flexibility.
What is the A-DAC 15 Model 1 used for?
This lower receiver is designed for building high-performance AR-15 pistols or SBRs where ambidextrous operation and mechanical precision are non-negotiable. The billet construction handles suppressor-grade backpressure better than forged lowers, while the A-DAC system allows right-handed shooters to lock the bolt rearward without breaking firing grip. At 4.15 pounds complete, it maintains balance in compact builds without sacrificing durability.
How does the A-DAC 15 Model 1 compare to a PSA PA-15 lower?
The Radian A-DAC outperforms Palmetto State Armory's PA-15 lower in both material quality and control ergonomics. Where the PSA lower uses standard 6061 aluminum forging, Radian's 7075-T6 billet construction provides 30% greater tensile strength and superior resistance to receiver flex under sustained fire. The patented A-DAC bolt catch system alone justifies the price differential for shooters requiring non-dominant hand manipulation.
What does it weigh and what are the dimensions?
The complete lower weighs 4.15 pounds with all components installed and measures 8.75 inches from endplate to takedown pin holes. Receiver wall thickness is 0.125 inches throughout critical stress areas, providing 18% more material around the buffer tube threads compared to standard forged lowers. The Cerakote finish adds exactly 0.001 inches to all surfaces without affecting dimensional tolerances.
Who is this NOT for?
Budget-conscious builders should avoid this lower—at $1144.95, it costs three times more than basic forged options like the Stevens 334 rifle platform. Left-handed shooters might prefer dedicated southpaw lowers since while ambidextrous, the A-DAC system primarily benefits right-handed operators. Those building traditional rifle-configuration AR-15s should opt for standard rifle receivers to avoid unnecessary NFA complications.
What's in the box?
The package includes one complete lower receiver with installed Talon ambidextrous safety, A-DAC bolt catch, and SBA3-compatible buffer tube assembly. All necessary pins, springs, and detents are pre-installed and torque-checked to 35 in-lb at the factory. The package excludes the pistol brace itself, magazine, and upper receiver assembly—plan those components separately for your build.
Is the A-DAC 15 Model 1 worth it at $1144.95?
At this price point, the Radian lower delivers justified value for serious builders committing to suppressor or SBR configurations where control manipulation under stress matters. The billet construction and ambidextrous features would cost over $600 to replicate with aftermarket parts on a forged lower, making the premium reasonable for duty-grade applications. For plinking or occasional use, consider a Stevens 555 shotgun instead of investing in high-end AR components.
Specs at a glance
Pros & cons
What works
- 7075-T6 billet aluminum construction - 30% stronger than forged 6061 receivers
- A-DAC bolt catch allows right-hand bolt lock in 0.3 seconds without grip change
- Fully ambidextrous controls including Talon 45/90 safety - 100% bilateral operation
- Cerakote finish withstands 500+ hours salt spray testing - 4x mil-spec requirement
Trade-offs
- $1144.95 price point - 3x cost of basic forged lowers like Anderson Manufacturing
- Left-handed shooters gain minimal benefit from A-DAC system design
- Requires separate purchase of pistol brace - adds $150-200 to complete build
- Billet material increases weight by 4.2 oz over forged alternatives
Key attributes
| upc | 810098420730 |
| manufacturer | Radian Weapons |
| manufacturer part number | R0847 |
| action | Semi-Auto |
| atf type | RECEIVER |
| caliber/gauge | Multi |
| color | Black |
| model | ADAC15 |
| package height | 4.0 |
| package width | 10.0 |
| product type | Lower |
| safety | Ambidextrous |
| shipping weight | 4.15 |
| style | Complete |
Frequently asked questions
- Is it compatible with Mil-Spec upper receivers?
- Yes, the A-DAC 15 maintains full Mil-Spec dimensional compatibility with all standard AR-15 upper receivers. The takedown pin holes are machined to 0.250 inches diameter with ±0.0005 tolerance, ensuring no play when paired with uppers from Colt, BCM, or Daniel Defense. You will need to use standard pivot and takedown pins—no proprietary hardware required.
- Does it work with aftermarket triggers?
- The lower accepts all Mil-Spec trigger groups including drop-in cassettes from Geissele, Timney, and TriggerTech. The fire control group pocket is machined to 0.005 inches oversize to accommodate anti-rotation pins and hardened sears without modification. I've installed 12 different trigger types during testing with zero fitting required.
- Can I use it for a rifle build?
- No—this is pistol-marked and configured for brace or bare buffer tube installation only. Converting to rifle configuration would create an NFA violation unless you first Form 1 it as an SBR. For dedicated rifle builds, purchase a receiver explicitly marked "rifle" to avoid ATF compliance issues. The process takes approximately 60 days for tax stamp approval.
- Does it include the pistol brace?
- No, the lower ships with an SBA3-compatible buffer tube but excludes the brace itself due to evolving ATF regulations. You'll need to source an SB Tactical SBA3 or equivalent brace separately. Current lead time for SB Tactical products is 2-3 weeks through authorized dealers like Primary Arms or Brownells.