Does the Lewis Machine & Tool MARS-L SOPMOD work with the TacFire Pistol Upper .300 AAC Blackout?

Lower Receiver
Lewis Machine & Tool MARS-L SOPMOD

Upper Receiver
TacFire Pistol Upper .300 AAC Blackout 10 Barrel
from $252.88
Lewis Machine & Tool lower and TacFire upper compatibility
Yes, they fit
The Lewis Machine & Tool MARS-L SOPMOD works with the TacFire Pistol Upper .300 AAC Blackout 10 Barrel. 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 Lewis Machine & Tool lower and TacFire upper
Backed by tens of thousands of qualified builds that have both a lower and an upper.
Share of builds with the Lewis Machine & Tool MARS-L SOPMOD and any upper
- This pairTacFire Pistol Upper .300 AAC Blackout 10 Barrel11%
Share of builds with the TacFire Pistol Upper .300 AAC Blackout and any lower
- This pairLewis Machine & Tool MARS-L SOPMOD3%
- PSA GEN3 PA10 Forged MOE EPT SBA4 .308 LowerDoes not fit3%
Lewis Machine & Tool MARS-L SOPMOD
- Of lower picks
- 0%
- Median paid
- n/a
TacFire Pistol Upper .300 AAC Blackout
- Of upper picks
- 0.2%
- Median paid
- $254
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 TacFire upper
The part builders pick most often in each slot alongside these two, checked against both. Parts that conflict are left out.
Bolt Carrier Group

FAXON Firearms 5.56 Nitride TIN PVD
Fits both
Stock & Brace
Pistol Grip
Lewis Machine & Tool MARS-L vs TacFire Pistol Upper .300 AAC: specs and prices
| Lewis Machine & Tool MARS-L | TacFire Pistol Upper .300 | |
|---|---|---|
| Best price | n/a | $252.88 at BattleHawk Armory |
| Stores | n/a | 6 of 6 in stock |
| Assembly | Complete | Complete |
| Platform | AR-15 | AR-15 |
| Caliber | Multi | 300 Blackout |
| Length | n/a | 10 |
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
- TacFire Pistol Upper .300 AAC Blackout: lowest $269.99 on Aug 12, highest $299.99 on Jul 5 over the last 90 days.
Upper Receivers frequently paired with the Lewis Machine & Tool MARS-L SOPMOD
Most picked next to it in real builds. Only parts our rules say fit the Lewis Machine & Tool MARS-L SOPMOD are listed.
Lower Receivers frequently paired with the TacFire Pistol Upper .300 AAC Blackout
Most picked next to it in real builds. Only parts our rules say fit the TacFire Pistol Upper .300 AAC Blackout are listed.


















