Does the Daniel Defense MK18 RIII work with the Radian Weapons Raptor SD-SL?

Upper Receiver
Daniel Defense MK18 RIII
from $1454.00

Charging Handle
Radian Weapons Raptor SD-SL
from $110.99
Daniel Defense upper and Radian charging handle compatibility
Yes, they fit
The Daniel Defense MK18 RIII works with the Radian Weapons Raptor SD-SL. 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 Daniel Defense upper and Radian charging handle
Backed by tens of thousands of qualified builds that have both an upper and a charging handle.
Share of builds with the Daniel Defense MK18 RIII and any charging handle
- This pairRadian Weapons Raptor SD-SL13%
Share of builds with the Radian Weapons Raptor SD-SL and any upper
- This pairDaniel Defense MK18 RIII0.5%
Daniel Defense MK18 RIII
- Of upper picks
- 0.1%
- Median paid
- $1412
Radian Weapons Raptor SD-SL
- Of charging handle picks
- 1.7%
- Median paid
- $111
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 Daniel Defense upper and Radian charging handle
The part builders pick most often in each slot alongside these two, checked against both. Parts that conflict are left out.
Daniel Defense MK18 RIII vs Radian Weapons Raptor SD-SL: specs and prices
| Daniel Defense MK18 RIII | Radian Weapons Raptor SD-SL | |
|---|---|---|
| Best price | $1454.00 at Primary Arms | $133.99 at Ammunition Depot |
| Stores | 5 of 5 in stock | 7 of 8 in stock |
| Assembly | Stripped | n/a |
| Platform | AR-15 | AR-15 |
| Caliber | 5.56 NATO | n/a |
| Length | 10.3 | n/a |
| Hand | n/a | Ambidextrous |
| Latch Style | n/a | Extended |
| Material | n/a | 7075-T6 Aluminum |
| Color | n/a | Black |
| Finish | n/a | Hardcoat Anodized |
Both for $1587.99 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.
Price history, last 90 days
- Daniel Defense MK18 RIII: lowest $1259.99 on Jul 21, highest $1527.00 on Aug 2 over the last 90 days.
- Radian Weapons Raptor SD-SL: lowest $110.99 on Jul 14, highest $140.99 on Sep 21 over the last 90 days.
Charging Handles frequently paired with the Daniel Defense MK18 RIII
Most picked next to it in real builds. Only parts our rules say fit the Daniel Defense MK18 RIII are listed.
Upper Receivers frequently paired with the Radian Weapons Raptor SD-SL
Most picked next to it in real builds. Only parts our rules say fit the Radian Weapons Raptor SD-SL are listed.

















