Does the Centurion Arms CM4 5.56 Forged work with the Rain Bromurlbk Rain OrdnanceAR15 Upper?
Lower Receiver
Centurion Arms CM4 5.56 Forged
from $128.25
Upper Receiver
Rain Bromurlbk Rain OrdnanceAR15 Upper .223/5.56 NATO
from $217.69
Centurion Arms lower and Black Rain Ordnance upper compatibility
Yes, they fit
The Centurion Arms CM4 5.56 Forged works with the Rain Bromurlbk Rain OrdnanceAR15 Upper .223/5.56. 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 Centurion Arms lower and Black Rain Ordnance upper
Backed by tens of thousands of qualified builds that have both a lower and an upper.
Share of builds with the Centurion Arms CM4 5.56 Forged and any upper
Share of builds with the Rain Bromurlbk Rain OrdnanceAR15 Upper and any lower
- This pairCenturion Arms CM4 5.56 Forged25%
Centurion Arms CM4 5.56 Forged
- Of lower picks
- 0.1%
- Median paid
- $128
Rain Bromurlbk Rain OrdnanceAR15 Upper
- Of upper picks
- 0%
- Median paid
- $218
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 Centurion Arms lower and Black Rain Ordnance 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
Pistol Grip
Stock & Brace
Charging Handle
Bravo Company BCM MK2 Large Latch
Unconfirmed
Barrel
FN America FN 16 Mid-Length 5.56mm
Fits both
Handguard
Gas Block
Buffer Tube Assembly
Muzzle Device
Centurion Arms CM4 5.56 Forged vs Rain Bromurlbk Rain: specs and prices
| Centurion Arms CM4 5.56 | Rain Bromurlbk Rain | |
|---|---|---|
| Best price | $128.25 at Primary Arms | $259.99 at Optics Planet |
| Stores | 1 of 1 in stock | 1 of 2 in stock |
| Assembly | Stripped | Stripped |
| Platform | AR-15 | AR-15 |
| Caliber | 5.56 NATO | 5.56 NATO |
| Trigger Pin | .154 | n/a |
| Finish | Hardcoat Anodized | n/a |
Both for $388.24 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
- Centurion Arms CM4 5.56 Forged: lowest $128.25 on Jul 7, highest $128.25 on Jul 7 over the last 90 days.
- Rain Bromurlbk Rain OrdnanceAR15 Upper: lowest $217.69 on Jul 12, highest $299.99 on Aug 8 over the last 90 days.
Upper Receivers frequently paired with the Centurion Arms CM4 5.56 Forged
Most picked next to it in real builds. Only parts our rules say fit the Centurion Arms CM4 5.56 Forged are listed.
Lower Receivers frequently paired with the Rain Bromurlbk Rain OrdnanceAR15 Upper
Most picked next to it in real builds. Only parts our rules say fit the Rain Bromurlbk Rain OrdnanceAR15 Upper are listed.
