Does the CMMG MK4 .223 Remington AR Lower work with the CMMG Banshee 9mm Upper?
Lower Receiver
CMMG MK4 .223 Remington AR Lower
from $100.02
Upper Receiver
CMMG Banshee 9mm Upper
from $716.63
CMMG lower and CMMG upper compatibility
They fit, with a catch
The CMMG MK4 .223 Remington AR Lower works with the CMMG Banshee 9mm Upper, with one thing to check: Lower Receiver (.223 Wylde / 5.56 NATO / Multi) needs a 9mm magazine well adapter for a PCC/9mm build.
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.
CMMG MK4 .223 Remington AR vs CMMG Banshee 9mm Upper: specs and prices
| CMMG MK4 .223 Remington AR | CMMG Banshee 9mm Upper | |
|---|---|---|
| Best price | $100.02 at Classic Firearms | $716.63 at BattleHawk Armory |
| Stores | 3 of 7 in stock | 0 of 1 in stock |
| Assembly | Stripped | Complete |
| Platform | AR-15 | AR-9 |
| Caliber | 5.56 NATO | 9mm |
| Finish | Cerakote | n/a |
| Color | Black | n/a |
| Gas System Length | n/a | Blowback |
| Length | n/a | 5 |
Both for $816.65 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
- CMMG MK4 .223 Remington AR Lower: lowest $94.69 on Jul 15, highest $126.99 on Jul 11 over the last 90 days.