Does the Knights Armament Knight's Armament Co work with the Rosco Manufacturing Bloodline 5.56 M4?

Lower Receiver
Knights Armament Knight's Armament Co SR-15
from $650.00

Barrel
Rosco Manufacturing Bloodline 5.56 M4 Carbine
from $131.49
Knights Armament lower and Rosco Manufacturing barrel compatibility
Yes, they fit
The Knights Armament Knight's Armament Co SR-15 works with the Rosco Manufacturing Bloodline 5.56 M4 Carbine. 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 Knights Armament lower and Rosco Manufacturing barrel
Backed by thousands of qualified builds that have both a lower and a barrel.
Share of builds with the Knights Armament Knight's Armament Co and any barrel
- This pairRosco Manufacturing Bloodline 5.56 M4 Carbine20%
Share of builds with the Rosco Manufacturing Bloodline 5.56 M4 and any lower
- This pairKnights Armament Knight's Armament Co SR-150.7%
Knights Armament Knight's Armament Co
- Of lower picks
- 0.3%
- Median paid
- $1000
Rosco Manufacturing Bloodline 5.56 M4
- Of barrel picks
- 6.6%
- Median paid
- $134
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 Knights Armament lower and Rosco Manufacturing barrel
The part builders pick most often in each slot alongside these two, checked against both. Parts that conflict are left out.
Upper Receiver
Charging Handle
Gas Block
Handguard
Stock & Brace
Pistol Grip
Muzzle Device

Fortis Control 300 Muzzle Brake 5/8x24
Fits, check note
Knights Armament Knight's vs Rosco Manufacturing Bloodline: specs and prices
| Knights Armament Knight's | Rosco Manufacturing | |
|---|---|---|
| Best price | $650.00 at BattleHawk Armory | $131.49 at Ammunition Depot |
| Stores | 2 of 2 in stock | 7 of 8 in stock |
| Assembly | Stripped | n/a |
| Platform | AR-15 | n/a |
| Caliber | 5.56 NATO | AR-15 |
| Gas System | n/a | Carbine |
| Length | n/a | Standard |
| Twist | n/a | 1:7 |
| Contour | n/a | M4 |
| Thread | n/a | 1/2x28 |
Both for $781.49 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
- Knights Armament Knight's Armament Co: lowest $650.00 on Sep 25, highest $749.00 on Aug 8 over the last 90 days.
- Rosco Manufacturing Bloodline 5.56 M4: lowest $131.49 on Jul 5, highest $162.99 on Aug 4 over the last 90 days.
Barrels frequently paired with the Knights Armament Knight's Armament Co
Most picked next to it in real builds. Only parts our rules say fit the Knights Armament Knight's Armament Co are listed.
Lower Receivers frequently paired with the Rosco Manufacturing Bloodline 5.56 M4
Most picked next to it in real builds. Only parts our rules say fit the Rosco Manufacturing Bloodline 5.56 M4 are listed.




















