Does the Daniel Defense MK18 RIII work with the SureFire Optimized?
Daniel Defense upper and SureFire bolt carrier group compatibility
Yes, they fit
The Daniel Defense MK18 RIII works with the SureFire Optimized. Our compatibility rules found no conflict between them.
This exact setup has been built more than once on GunPartPicker.
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 SureFire bolt carrier group
Backed by thousands of qualified builds that have both an upper and a bolt carrier group.
Share of builds with the Daniel Defense MK18 RIII and any bolt carrier group
- This pairSureFire Optimized25%
- Battle Arms13%
Share of builds with the SureFire Optimized and any upper
- This pairDaniel Defense MK18 RIII6%
Daniel Defense MK18 RIII
- Of upper picks
- 0.1%
- Median paid
- $1412
SureFire Optimized
- Of bolt carrier group picks
- 0.3%
- Median paid
- $359
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 SureFire bolt carrier group
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 SureFire Optimized: specs and prices
| Daniel Defense MK18 RIII | SureFire Optimized | |
|---|---|---|
| Best price | $1454.00 at Primary Arms | $449.99 at Primary Arms |
| Stores | 5 of 5 in stock | 1 of 2 in stock |
| Assembly | Stripped | n/a |
| Platform | AR-15 | n/a |
| Caliber | 5.56 NATO | n/a |
| Length | 10.3 | n/a |
| Cartridge | n/a | 5.56 NATO |
| Style | n/a | Custom Bolt Carrier |
Both for $1903.99 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.
- SureFire Optimized: lowest $359.00 on Jul 11, highest $449.99 on Jul 6 over the last 90 days.
Bolt Carrier Groups 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 SureFire Optimized
Most picked next to it in real builds. Only parts our rules say fit the SureFire Optimized are listed.
