Does the Aero Precision M4E1 Threaded Barreled work with the Rosco Manufacturing Purebred 300?

Aero Precision M4e1 Threaded Barreled Ar-15 Upper 5.56 Rifle Atlas R-One - 18"

Upper Receiver

Aero Precision M4E1 Threaded Barreled Upper 5.56 Rifle Atlas

from $599.99

Rosco Manufacturing Purebred 300 Blackout Ar-15 Barrel Heavy Pistol Length - 8.2"

Barrel

Rosco Manufacturing Purebred 300 Blackout Heavy Pistol

from $169.00

Aero Precision upper and Rosco Manufacturing barrel compatibility

They fit, with a catch

The Aero Precision M4E1 Threaded Barreled Upper 5.56 works with the Rosco Manufacturing Purebred 300 Blackout Heavy, with one thing to check: Barrel thread pitch (5/8x24) does not match Upper Receiver thread pitch (1/2x28).

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 Aero Precision upper and Rosco Manufacturing barrel

Backed by thousands of qualified builds that have both an upper and a barrel.

Barrels builders put on the Aero Precision M4E1 Threaded Barreled

Share of builds with the Aero Precision M4E1 Threaded Barreled and any barrel

Upper Receivers builders put under the Rosco Manufacturing Purebred 300

Share of builds with the Rosco Manufacturing Purebred 300 and any upper

  • Aero Precision M4E1 Threaded Barreled

    Of upper picks
    0.3%
    Median paid
    $526

  • Rosco Manufacturing Purebred 300

    Of barrel picks
    0.1%
    Median paid
    $176
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 Aero Precision upper 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.

Charging Handle

Lower Receiver

Bolt Carrier Group

Stock & Brace

Trigger

Light

Optic

Pistol Grip

Aero Precision M4E1 Threaded vs Rosco Manufacturing Purebred: specs and prices

Aero Precision M4E1 ThreadedRosco Manufacturing Purebred
Best price$599.99 at Brownells$169.00 at Brownells
Stores0 of 4 in stock0 of 3 in stock
AssemblyCompleten/a
PlatformAR-15n/a
Gas System LengthRiflen/a
Caliber5.56 NATO300 Blackout
Receiver TypeM4E1n/a
Length188.2
Gas Systemn/aPistol
Twistn/a1:7
Contourn/aHeavy
Threadn/a5/8x24

Both for $768.99 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.

Aero Precision M4E1 Threaded Barreled Upper 5.56

Rosco Manufacturing Purebred 300 Blackout Heavy

Price history, last 90 days

  • Aero Precision M4E1 Threaded Barreled: lowest $526.14 on Jul 6, highest $599.99 on Jul 12 over the last 90 days.
  • Rosco Manufacturing Purebred 300: lowest $169.00 on Aug 30, highest $177.99 on Jul 13 over the last 90 days.

Barrels frequently paired with the Aero Precision M4E1 Threaded Barreled

Most picked next to it in real builds. Only parts our rules say fit the Aero Precision M4E1 Threaded Barreled are listed.

Upper Receivers frequently paired with the Rosco Manufacturing Purebred 300

Most picked next to it in real builds. Only parts our rules say fit the Rosco Manufacturing Purebred 300 are listed.