Does the LMT MARS-L Stripped work with the Daniel Defense 5.56 10.3" Barrel Upper?

Lower Receiver
LMT MARS-L Stripped
from $320.99

Upper Receiver
Daniel Defense 5.56 10.3" Barrel Upper
from $1527.99
Lewis Machine & Tool lower and Daniel Defense upper compatibility
Yes, they fit
The LMT MARS-L Stripped works with the Daniel Defense 5.56 10.3" Barrel Upper. Our compatibility rules found no conflict between them.
No one has built this exact setup yet, but Lewis Machine & Tool lowers with Daniel Defense uppers are a common pairing.
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 Lewis Machine & Tool lower and Daniel Defense upper
Backed by tens of thousands of qualified builds that have both a lower and an upper.
Share of builds with the LMT MARS-L Stripped and any upper
Share of builds with the Daniel Defense 5.56 10.3" Barrel Upper and any lower
LMT MARS-L Stripped
- Of lower picks
- 2.4%
- Median paid
- $306
Daniel Defense 5.56 10.3" Barrel Upper
- Of upper picks
- 0%
- Median paid
- $1528
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 Lewis Machine & Tool lower and Daniel Defense upper
The part builders pick most often in each slot alongside these two, checked against both. Parts that conflict are left out.
Pistol Grip
Charging Handle

Radian Raptor & Talon Safety Selector Combo
Unconfirmed
Stock & Brace
Barrel
Muzzle Device
LMT MARS-L Stripped vs Daniel Defense 5.56 10.3": specs and prices
| LMT MARS-L Stripped | Daniel Defense 5.56 10.3" | |
|---|---|---|
| Best price | $342.00 at BattleHawk Armory | $1527.99 at Palmetto State Armory |
| Stores | 3 of 4 in stock | 0 of 1 in stock |
| Assembly | Stripped | Complete |
| Platform | AR-15 | AR-15 |
| Trigger Pin | .154 | n/a |
| Finish | Hardcoat Anodized | n/a |
| Gas System Length | n/a | Carbine |
| Caliber | n/a | 5.56 NATO |
| Receiver Type | n/a | Forged |
| Length | n/a | 10.3 |
Both for $1869.99 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
- LMT MARS-L Stripped: lowest $320.99 on Jul 5, highest $352.35 on Jul 11 over the last 90 days.
- Daniel Defense 5.56 10.3" Barrel Upper: lowest $1412.00 on Jul 12, highest $1527.99 on Aug 8 over the last 90 days.
Upper Receivers frequently paired with the LMT MARS-L Stripped
Most picked next to it in real builds. Only parts our rules say fit the LMT MARS-L Stripped are listed.
Lower Receivers frequently paired with the Daniel Defense 5.56 10.3" Barrel Upper
Most picked next to it in real builds. Only parts our rules say fit the Daniel Defense 5.56 10.3" Barrel Upper are listed.















