Does the Diamondback Firearms .300 Blackout work with the Colt 5.56 NATO /?

Barrel
Diamondback Firearms .300 Blackout Nitride
from $72.00

Bolt Carrier Group
Colt 5.56 NATO /
from $182.77
Diamondback barrel and Colt bolt carrier group compatibility
Yes, they fit
The Diamondback Firearms .300 Blackout Nitride works with the Colt 5.56 NATO /. 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 Diamondback barrel and Colt bolt carrier group
Backed by thousands of qualified builds that have both a barrel and a bolt carrier group.
Share of builds with the Diamondback Firearms .300 Blackout and any bolt carrier group
- This pairColt 5.56 NATO /25%
Share of builds with the Colt 5.56 NATO / and any barrel
- This pairDiamondback Firearms .300 Blackout Nitride7%
Diamondback Firearms .300 Blackout
- Of barrel picks
- 0.2%
- Median paid
- $72
Colt 5.56 NATO /
- Of bolt carrier group picks
- 0.3%
- Median paid
- $182
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 Diamondback barrel and Colt 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

Colt M4 Commando 5.56mm Semi-Auto
Fits both
Upper Receiver
Charging Handle
Gas Block
Suppressor
Stock & Brace
Pistol Grip
Diamondback Firearms .300 vs Colt 5.56 NATO /: specs and prices
| Diamondback Firearms .300 | Colt 5.56 NATO / | |
|---|---|---|
| Best price | $72.00 at BattleHawk Armory | $182.77 at BattleHawk Armory |
| Stores | 4 of 4 in stock | 0 of 2 in stock |
| Caliber | 300 Blackout | n/a |
| Gas System | Pistol | n/a |
| Length | 30 | n/a |
| Twist | 1:8 | n/a |
| Contour | HBAR | n/a |
| Thread | 5/8x24 | n/a |
| Cartridge | n/a | 5.56 NATO / .300 BLK |
| Style | n/a | M16 Bolt Carrier |
| Finish | n/a | Phosphate |
Both for $254.77 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
- Diamondback Firearms .300 Blackout: lowest $72.99 on Jul 12, highest $103.99 on Jul 14 over the last 90 days.
- Colt 5.56 NATO /: lowest $182.77 on Jul 5, highest $229.99 on Jul 26 over the last 90 days.
Bolt Carrier Groups frequently paired with the Diamondback Firearms .300 Blackout
Most picked next to it in real builds. Only parts our rules say fit the Diamondback Firearms .300 Blackout are listed.
Barrels frequently paired with the Colt 5.56 NATO /
Most picked next to it in real builds. Only parts our rules say fit the Colt 5.56 NATO / are listed.
















