Does the CMMG Banshee MK4 Upper Group .300BLK work with the CMMG .22LR Stainless Steel?
Upper Receiver
CMMG Banshee MK4 Upper Group .300BLK 12.5"
from $665.23
Bolt Carrier Group
CMMG .22LR Stainless Steel
from $157.49
CMMG upper and CMMG bolt carrier group compatibility
Yes, they fit
The CMMG Banshee MK4 Upper Group .300BLK 12.5" works with the CMMG .22LR Stainless Steel. Our compatibility rules found no conflict between them.
No one has built this exact setup yet, but CMMG uppers with CMMG 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 CMMG upper and CMMG bolt carrier group
Backed by thousands of qualified builds that have both an upper and a bolt carrier group.
Share of builds with the CMMG .22LR Stainless Steel and any upper
CMMG Banshee MK4 Upper Group .300BLK
- Of upper picks
- 0%
- Median paid
- $662
CMMG .22LR Stainless Steel
- Of bolt carrier group picks
- 0.1%
- Median paid
- $157
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 CMMG upper and CMMG bolt carrier group
The part builders pick most often in each slot alongside these two, checked against both. Parts that conflict are left out.
Lower Receiver
Pistol Grip
Charging Handle
Fits both
Stock & Brace
Gas Block
Handguard
Muzzle Device
CMMG Banshee MK4 Upper Group vs CMMG .22LR Stainless Steel: specs and prices
| CMMG Banshee MK4 Upper Group | CMMG .22LR Stainless Steel | |
|---|---|---|
| Best price | $665.23 at BattleHawk Armory | $169.23 at Brownells |
| Stores | 0 of 2 in stock | 2 of 3 in stock |
| Assembly | Complete | n/a |
| Platform | AR-15 | n/a |
| Caliber | 300 Blackout | n/a |
| Receiver Type | M4 | n/a |
| Length | 12.5 | n/a |
| Cartridge | n/a | .22 LR |
| Style | n/a | Forged |
| Finish | n/a | Stainless |
Both for $834.46 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 Banshee MK4 Upper Group .300BLK: lowest $665.23 on Jul 5, highest $665.23 on Jul 5 over the last 90 days.
- CMMG .22LR Stainless Steel: lowest $160.68 on Jul 6, highest $169.23 on Aug 30 over the last 90 days.
Bolt Carrier Groups most paired with CMMG uppers
The CMMG Banshee MK4 Upper Group .300BLK is not in enough builds yet, so these are the most picked next to any CMMG upper. Only parts our rules say fit the CMMG Banshee MK4 Upper Group .300BLK are listed.
Upper Receivers frequently paired with the CMMG .22LR Stainless Steel
Most picked next to it in real builds. Only parts our rules say fit the CMMG .22LR Stainless Steel are listed.
