Does the LWRC IC Lower 5.56 / .223 Rem work with the CMMG Resolute MK4 6mm ARC Upper?
Lower Receiver
LWRC IC Lower 5.56 / .223 Rem
from $599.00
Upper Receiver
CMMG Resolute MK4 6mm ARC Upper
from $682.74
LWRC lower and CMMG upper compatibility
Yes, they fit
The LWRC IC Lower 5.56 / .223 Rem works with the CMMG Resolute MK4 6mm ARC Upper. 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 LWRC lower and CMMG upper
Backed by tens of thousands of qualified builds that have both a lower and an upper.
Share of builds with the LWRC IC Lower 5.56 / .223 Rem and any upper
- This pairCMMG Resolute MK4 6mm ARC Upper3%
Share of builds with the CMMG Resolute MK4 6mm ARC Upper and any lower
- This pairLWRC IC Lower 5.56 / .223 Rem9%
LWRC IC Lower 5.56 / .223 Rem
- Of lower picks
- 0.2%
- Median paid
- $599
CMMG Resolute MK4 6mm ARC Upper
- Of upper picks
- 0.1%
- Median paid
- $680
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 LWRC lower and CMMG 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
Fits, check note
Charging Handle
Precision Reflex Pri M84 Gas Buster
Fits both
Muzzle Device
Light
Suppressor
Barrel
Stock & Brace
LWRC IC Lower 5.56 / .223 Rem vs CMMG Resolute MK4 6mm ARC: specs and prices
| LWRC IC Lower 5.56 / .223 | CMMG Resolute MK4 6mm ARC | |
|---|---|---|
| Best price | $599.00 at BattleHawk Armory | $799.99 at Optics Planet |
| Stores | 3 of 3 in stock | 3 of 4 in stock |
| Assembly | Complete | Complete |
| Platform | AR-15 | AR-15 |
| Caliber | 5.56 NATO | 6mm ARC |
| Color | Black | n/a |
| Length | n/a | 16.1 |
Both for $1398.99 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
- LWRC IC Lower 5.56 / .223 Rem: lowest $740.62 on Jul 5, highest $740.62 on Jul 5 over the last 90 days.
- CMMG Resolute MK4 6mm ARC Upper: lowest $682.74 on Jul 5, highest $949.95 on Sep 24 over the last 90 days.
Upper Receivers frequently paired with the LWRC IC Lower 5.56 / .223 Rem
Most picked next to it in real builds. Only parts our rules say fit the LWRC IC Lower 5.56 / .223 Rem are listed.
Lower Receivers frequently paired with the CMMG Resolute MK4 6mm ARC Upper
Most picked next to it in real builds. Only parts our rules say fit the CMMG Resolute MK4 6mm ARC Upper are listed.
