Radian Weapons Model 1 Builder Kit AR-15 Matched Upper & A-DAC 15 Lower, 15.5 in M-LOK Handguard, Brown Finish
This Radian Weapons Model 1 Builder Kit pairs a matched upper receiver with the A-DAC 15 lower and a 15.5-inch free-float M-LOK handguard, all in a uniform factory brown finish. Designed and manufactured in Oregon, USA, it provides a high-quality foundation for an AR-15 build with ambidextrous lower controls and an extended mounting surface. The lower is marked MULTI CAL for flexible chambering options. Note that the kit is not a functioning firearm until completed.
The receivers are factory new with virtually no handling marks. The A-DAC 15 lower integrates a right-side ambidextrous bolt/bolt-release paddle, and the full-length top Picatinny rail and M-LOK slots on the handguard offer broad mounting flexibility. The kit ships in the original Radian Builder Kit box with fitted foam and includes the barrel nut wrench, manual, accessory polybags, decals, and a removable multi-port muzzle device installed on a short dummy tube for packaging.
Condition
Overall Condition: Factory new condition, unfired with no signs of handling. Includes all accessories and paperwork in the original factory box/case.
Bore Condition: Not applicable; no barrel is included with this builder kit.
Specific Condition Notes: There are practically no markings from any handling. The kit does not include a bolt carrier group, trigger, or barrel. A removable multi-port muzzle device is pre-installed on a short dummy tube for packaging. Refer to the photos for a close look at the components and finish.
What’s Included
- Radian Builder Kit manual
- Barrel nut wrench
- Removable multi-port muzzle device installed on a short dummy tube (for packaging)
- Radian Builder Kit factory box with fitted foam insert
- Two sealed 'Radian Accessories' polybags (contents unspecified)
- Radian logo decals
This Model 1 Builder Kit centers on a matched upper receiver and A-DAC 15 lower for consistent fit and finish. The A-DAC 15 lower features a right-side ambidextrous bolt/bolt-release paddle for versatile control. The lower is marked MULTI CAL to support a range of AR-15 chamberings.
The 15.5-inch free-float M-LOK handguard delivers an extended mounting surface with M-LOK slots and a full-length top Picatinny rail, giving ample room for accessories and sighting solutions. Its free-float design helps maintain barrel clearance once a barrel is installed.
The receivers and handguard share a uniform brown factory finish for a cohesive look across the build. The kit is designed and manufactured in Oregon, USA, reflecting Radian’s focus on precise machining and component integration.
This is a builder kit and is not a functioning firearm until completed. It does not include a barrel, gas system, bolt carrier group, or trigger. It provides the core receiver set and handguard foundation, along with the barrel nut wrench and factory packaging to complete a high-quality AR-15 build.