Does the Lewis Machine & Tool Mrp-L M-LOK Specwar work with the LMT Defense Full-Auto Piston 5.56 Bolt?

Upper Receiver
Lewis Machine & Tool Mrp-L M-LOK Specwar 5.56mm Assembled
from $758.99

Bolt Carrier Group
LMT Defense Full-Auto Piston 5.56 Bolt Carrier G2
from $261.45
Lewis Machine & Tool upper and Lewis Machine & Tool bolt carrier group compatibility
Yes, they fit
The Lewis Machine & Tool Mrp-L M-LOK Specwar 5.56mm works with the LMT Defense Full-Auto Piston 5.56 Bolt Carrier. Our compatibility rules found no conflict between them.
No one has built this exact setup yet, but Lewis Machine & Tool uppers with Lewis Machine & Tool bolt carrier groups 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 upper and Lewis Machine & Tool bolt carrier group
Backed by thousands of qualified builds that have both an upper and a bolt carrier group.
Share of builds with the Lewis Machine & Tool Mrp-L M-LOK Specwar and any bolt carrier group
Lewis Machine & Tool Mrp-L M-LOK Specwar
- Of upper picks
- 0.1%
- Median paid
- $759
LMT Defense Full-Auto Piston 5.56 Bolt
Not in enough builds yet to report.
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 upper and Lewis Machine & Tool bolt carrier group
The part builders pick most often in each slot alongside these two, checked against both. Parts that conflict are left out.
Charging Handle

Radian Raptor & Talon Safety Selector Combo
Unconfirmed
Pistol Grip
Buffer Tube Assembly
Stock & Brace
Lewis Machine & Tool Mrp-L vs LMT Defense Full-Auto Piston: specs and prices
| Lewis Machine & Tool Mrp-L | LMT Defense Full-Auto Piston | |
|---|---|---|
| Best price | $912.60 at BattleHawk Armory | $261.45 at AR15 Discounts |
| Stores | 3 of 5 in stock | 2 of 2 in stock |
| Assembly | Complete | n/a |
| Platform | AR-15 | n/a |
| Caliber | 5.56 NATO | n/a |
| Length | 11.5 | n/a |
| Cartridge | n/a | 5.56 NATO |
| Style | n/a | Billet |
| Finish | n/a | Nitride |
Both for $1174.05 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
- Lewis Machine & Tool Mrp-L M-LOK Specwar: lowest $716.99 on Jul 25, highest $940.50 on Jul 11 over the last 90 days.
- LMT Defense Full-Auto Piston 5.56 Bolt: lowest $253.80 on Jul 12, highest $261.45 on Sep 18 over the last 90 days.
Bolt Carrier Groups frequently paired with the Lewis Machine & Tool Mrp-L M-LOK Specwar
Most picked next to it in real builds. Only parts our rules say fit the Lewis Machine & Tool Mrp-L M-LOK Specwar are listed.
Upper Receivers most paired with Lewis Machine & Tool bolt carrier groups
The LMT Defense Full-Auto Piston 5.56 Bolt is not in enough builds yet, so these are the most picked next to any Lewis Machine & Tool bolt carrier group. Only parts our rules say fit the LMT Defense Full-Auto Piston 5.56 Bolt are listed.



















