Does the Rain Ordnance BRO-22 Receiver .22 LR work with the CMMG Upper Group Resolute MK4 .22Lr?
Lower Receiver
Rain Ordnance BRO-22 Receiver .22 LR Billet Lower
from $106.10
Upper Receiver
CMMG Upper Group Resolute MK4 .22Lr 16.1in 1-16 Twist 1/2 X
from $621.82
Black Rain Ordnance lower and CMMG upper compatibility
Yes, they fit
The Rain Ordnance BRO-22 Receiver .22 LR Billet works with the CMMG Upper Group Resolute MK4 .22Lr 16.1in 1-16. Our compatibility rules found no conflict between them.
This exact setup has been built more than once on GunPartPicker.
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 Black Rain Ordnance 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 Rain Ordnance BRO-22 Receiver .22 LR and any upper
- This pairCMMG Upper Group Resolute MK4 .22Lr 16.1in 1-1616%
Share of builds with the CMMG Upper Group Resolute MK4 .22Lr and any lower
- This pairRain Ordnance BRO-22 Receiver .22 LR Billet75%
Rain Ordnance BRO-22 Receiver .22 LR
- Of lower picks
- 0.1%
- Median paid
- $106
CMMG Upper Group Resolute MK4 .22Lr
- Of upper picks
- 0%
- Median paid
- $619
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 Black Rain Ordnance 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 both
Charging Handle
Fits both
Pistol Grip
Stock & Brace
Rain Ordnance BRO-22 Receiver vs CMMG Upper Group Resolute MK4: specs and prices
| Rain Ordnance BRO-22 | CMMG Upper Group Resolute | |
|---|---|---|
| Best price | $106.10 at Classic Firearms | $689.99 at Optics Planet |
| Stores | 1 of 1 in stock | 1 of 2 in stock |
| Assembly | Stripped | Complete |
| Platform | AR-15 | AR-15 |
| Caliber | .22 LR | .22 LR |
| Finish | Hardcoat Anodized | n/a |
| Color | Black | n/a |
| Length | n/a | 16.1 |
Both for $796.09 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
- Rain Ordnance BRO-22 Receiver .22 LR: lowest $106.10 on Jul 12, highest $106.10 on Jul 12 over the last 90 days.
- CMMG Upper Group Resolute MK4 .22Lr: lowest $621.82 on Jul 5, highest $709.99 on Jul 24 over the last 90 days.
Upper Receivers frequently paired with the Rain Ordnance BRO-22 Receiver .22 LR
Most picked next to it in real builds. Only parts our rules say fit the Rain Ordnance BRO-22 Receiver .22 LR are listed.
Lower Receivers most paired with CMMG uppers
The CMMG Upper Group Resolute MK4 .22Lr 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 Upper Group Resolute MK4 .22Lr are listed.
