Does the Cross Machine Tool UHP15 Billet Stripped work with the Aero Precision M4E1 Threaded Upper 8"?
Lower Receiver
Cross Machine Tool UHP15 Billet Stripped
from $2089.99
Upper Receiver
Aero Precision M4E1 Threaded Upper 8" .300 Blackout Barrel
from $540.99
lower and upper compatibility
Yes, they fit
The Cross Machine Tool UHP15 Billet Stripped works with the Aero Precision M4E1 Threaded Upper 8" .300. Our compatibility rules found no conflict between them.
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 lower and upper
Backed by tens of thousands of qualified builds that have both a lower and an upper.
Share of builds with the Cross Machine Tool UHP15 Billet Stripped and any upper
- Knights Armament 7.62MM SR-25A2 20" KITDoes not fit13%
- Knights Armament SR-25 APC 308 Winchester 16Does not fit7%
Cross Machine Tool UHP15 Billet Stripped
- Of lower picks
- 0.1%
- Median paid
- $2019
Aero Precision M4E1 Threaded Upper 8"
- Of upper picks
- 0%
- Median paid
- n/a
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 lower and upper
The part builders pick most often in each slot alongside these two, checked against both. Parts that conflict are left out.
Suppressor
Stock & Brace
Charging Handle
Bravo Company BCM GUNFIGHTER? 556 w/ MOD 3
Unconfirmed
Rifle Scope
Pistol Grip
Handguard
Fits both
Cross Machine Tool UHP15 vs Aero Precision M4E1 Threaded: specs and prices
| Cross Machine Tool UHP15 | Aero Precision M4E1 Threaded | |
|---|---|---|
| Best price | $2292.99 at Palmetto State Armory | $540.99 at AR15 Discounts |
| Stores | 1 of 3 in stock | 0 of 2 in stock |
| Assembly | Stripped | Complete |
| Platform | AR-15 | AR-15 |
| Caliber | n/a | 300 Blackout |
| Receiver Type | n/a | M4E1 |
| Length | n/a | 8 |
Both for $2833.98 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
- Cross Machine Tool UHP15 Billet Stripped: lowest $2018.79 on Jul 6, highest $2169.99 on Jul 12 over the last 90 days.
- Aero Precision M4E1 Threaded Upper 8": lowest $540.99 on Jul 5, highest $569.99 on Aug 5 over the last 90 days.
Upper Receivers frequently paired with the Cross Machine Tool UHP15 Billet Stripped
Most picked next to it in real builds. Only parts our rules say fit the Cross Machine Tool UHP15 Billet Stripped are listed.
Lower Receivers most paired with uppers
The Aero Precision M4E1 Threaded Upper 8" is not in enough builds yet, so these are the most picked next to any upper. Only parts our rules say fit the Aero Precision M4E1 Threaded Upper 8" are listed.
