Does the Cross Machine Tool UHP15-SS Billet work with the Radical Firearms .450 Bushmaster?
Cross Machine Tool lower and Radical Firearms barrel compatibility
Yes, they fit
The Cross Machine Tool UHP15-SS Billet Stripped works with the Radical Firearms .450 Bushmaster. 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 Cross Machine Tool lower and Radical Firearms barrel
Backed by thousands of qualified builds that have both a lower and a barrel.
Share of builds with the Radical Firearms .450 Bushmaster and any lower
- This pairCross Machine Tool UHP15-SS Billet Stripped4%
Cross Machine Tool UHP15-SS Billet
- Of lower picks
- 0%
- Median paid
- n/a
Radical Firearms .450 Bushmaster
- Of barrel picks
- 0.5%
- 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 Cross Machine Tool lower and Radical Firearms barrel
The part builders pick most often in each slot alongside these two, checked against both. Parts that conflict are left out.
Upper Receiver

Radical Firearms 5.56 Barreled Upper
Fits, check note
Charging Handle
Handguard

Daniel Defense MFR XL Free Float
Fits both
Gas Block
Stock & Brace
Muzzle Device
Pistol Grip
Buffer Tube Assembly
Cross Machine Tool UHP15-SS vs Radical Firearms .450: specs and prices
| Cross Machine Tool UHP15-SS | Radical Firearms .450 | |
|---|---|---|
| Best price | n/a | n/a |
| Stores | n/a | n/a |
| Assembly | Stripped | n/a |
| Platform | AR-15 | n/a |
| Trigger Pin | .154 | n/a |
| Finish | Hardcoat Anodized | n/a |
| Caliber | n/a | .450 Bushmaster |
| Gas System | n/a | Rifle |
| Length | n/a | 20 |
| Twist | n/a | 1:16 |
| Contour | n/a | Heavy |
| Thread | n/a | 5/8x32 |
Barrels most paired with Cross Machine Tool lowers
The Cross Machine Tool UHP15-SS Billet is not in enough builds yet, so these are the most picked next to any Cross Machine Tool lower. Only parts our rules say fit the Cross Machine Tool UHP15-SS Billet are listed.
Lower Receivers frequently paired with the Radical Firearms .450 Bushmaster
Most picked next to it in real builds. Only parts our rules say fit the Radical Firearms .450 Bushmaster are listed.



















