Does the Radian Weapons Upper .300 AAC Blackout 9 work with the KAK Industry K Spec Enhanced AR 15 Dual?

Upper Receiver
Radian Weapons Upper .300 AAC Blackout 9 Barrel
from $1829.95

Bolt Carrier Group
KAK Industry K Spec Enhanced AR 15 Dual Ejector Down Vent
from $242.99
Radian upper and KAK Industry bolt carrier group compatibility
Yes, they fit
The Radian Weapons Upper .300 AAC Blackout 9 Barrel works with the KAK Industry K Spec Enhanced AR 15 Dual Ejector. Our compatibility rules found no conflict between them.
This exact setup is in a real GunPartPicker build.
Counted from real GunPartPicker builds: parts lists people put together while planning to buy.
Checked by the same rules the AR builder runs on every part you add: caliber, frame size, receiver pattern, thread pitch and gas length.
Fit is judged from the specs retailers list, which can be missing or wrong. Confirm with the manufacturer before you buy, and have a qualified gunsmith check any build before you fire it.
How often builders pair the Radian upper and KAK Industry bolt carrier group
Backed by thousands of qualified builds that have both an upper and a bolt carrier group.
Share of builds with the Radian Weapons Upper .300 AAC Blackout 9 and any bolt carrier group
Share of builds with the KAK Industry K Spec Enhanced AR 15 Dual and any upper
Radian Weapons Upper .300 AAC Blackout 9
- Of upper picks
- 0.1%
- Median paid
- $1830
KAK Industry K Spec Enhanced AR 15 Dual
- Of bolt carrier group picks
- 0.1%
- Median paid
- $243
How we count ⌄
These shares come from GunPartPicker's build data: real parts lists people put together while planning a purchase, not sales or surveys. A build counts a part only when it is the final pick for its slot, so parts that were swapped out never count. Fit never comes from these numbers; it comes from our compatibility rules alone.
Frequently built with the Radian upper and KAK Industry bolt carrier group
The part builders pick most often in each slot alongside these two, checked against both. Parts that conflict are left out.
Pistol Grip
Stock & Brace
Charging Handle

Aero Precision Breach Small Levers
Fits both
Suppressor
Barrel
Radian Weapons Upper .300 AAC vs KAK Industry K Spec Enhanced: specs and prices
| Radian Weapons Upper .300 | KAK Industry K Spec Enhanced | |
|---|---|---|
| Best price | $1829.95 at Optics Planet | $242.99 at BattleHawk Armory |
| Stores | 2 of 4 in stock | 0 of 3 in stock |
| Assembly | Complete | n/a |
| Platform | AR-15 | n/a |
| Caliber | 300 Blackout | n/a |
| Length | 9 | n/a |
| Cartridge | n/a | Multi |
| Style | n/a | Billet |
| Finish | n/a | Nitride |
Both for $2072.94 at today's best prices.
Today's best prices and 90 day price history
Every store we track for each part, cheapest in stock first. Prices are checked through the day.
Radian Weapons Upper .300 AAC Blackout 9 Barrel
Price history, last 90 days
- Radian Weapons Upper .300 AAC Blackout 9: lowest $1829.95 on Jul 5, highest $2125.99 on Jul 11 over the last 90 days.
- KAK Industry K Spec Enhanced AR 15 Dual: lowest $242.99 on Jul 5, highest $269.95 on Jul 12 over the last 90 days.
Bolt Carrier Groups frequently paired with the Radian Weapons Upper .300 AAC Blackout 9
Most picked next to it in real builds. Only parts our rules say fit the Radian Weapons Upper .300 AAC Blackout 9 are listed.
Upper Receivers frequently paired with the KAK Industry K Spec Enhanced AR 15 Dual
Most picked next to it in real builds. Only parts our rules say fit the KAK Industry K Spec Enhanced AR 15 Dual are listed.


















