Does the PSA 7.5" 300AAC Blackout Nitride 9" work with the Rosco Manufacturing Bloodline?

Upper Receiver
PSA 7.5" 300AAC Blackout Nitride 9" Lightweight M-LOK Upper
from $319.99

Bolt Carrier Group
Rosco Manufacturing Bloodline SP-BL-82-300-BCG-GTP Carbine
from $325.30
Palmetto State Armory upper and Rosco Manufacturing bolt carrier group compatibility
Yes, they fit
The PSA 7.5" 300AAC Blackout Nitride 9" Lightweight works with the Rosco Manufacturing Bloodline. 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 Palmetto State Armory upper and Rosco Manufacturing bolt carrier group
Backed by thousands of qualified builds that have both an upper and a bolt carrier group.
Share of builds with the PSA 7.5" 300AAC Blackout Nitride 9" and any bolt carrier group
- This pairRosco Manufacturing Bloodline25%
- FailZero8%
Share of builds with the Rosco Manufacturing Bloodline and any upper
- This pairPSA 7.5" 300AAC Blackout Nitride 9" Lightweight13%
PSA 7.5" 300AAC Blackout Nitride 9"
- Of upper picks
- 0.1%
- Median paid
- $320
Rosco Manufacturing Bloodline
- Of bolt carrier group picks
- 0.2%
- Median paid
- $325
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 Palmetto State Armory upper and Rosco Manufacturing bolt carrier group
The part builders pick most often in each slot alongside these two, checked against both. Parts that conflict are left out.
Suppressor
Stock & Brace
Lower Receiver
Charging Handle

Aero Precision Breach Small Levers
Fits both
Rifle Scope
PSA 7.5" 300AAC Blackout vs Rosco Manufacturing Bloodline: specs and prices
| PSA 7.5" 300AAC Blackout | Rosco Manufacturing | |
|---|---|---|
| Best price | $319.99 at Palmetto State Armory | $325.30 at Classic Firearms |
| Stores | 1 of 1 in stock | 1 of 1 in stock |
| Assembly | Complete | n/a |
| Platform | AR-15 | n/a |
| Caliber | 300 Blackout | n/a |
| Length | 7.5 | n/a |
| Cartridge | n/a | 300 Blackout |
| Style | n/a | Billet |
| Finish | n/a | Nitride |
Both for $645.29 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
- PSA 7.5" 300AAC Blackout Nitride 9": lowest $319.99 on Jul 12, highest $319.99 on Jul 12 over the last 90 days.
- Rosco Manufacturing Bloodline: lowest $325.30 on Jul 12, highest $325.30 on Jul 12 over the last 90 days.
Bolt Carrier Groups frequently paired with the PSA 7.5" 300AAC Blackout Nitride 9"
Most picked next to it in real builds. Only parts our rules say fit the PSA 7.5" 300AAC Blackout Nitride 9" are listed.
Upper Receivers frequently paired with the Rosco Manufacturing Bloodline
Most picked next to it in real builds. Only parts our rules say fit the Rosco Manufacturing Bloodline are listed.

















