Does the Cross Machine Tool Upur-3A Billet Side work with the Proof Research 6mm ARC AR-Type?

Cross Machine Tool Upur-3a Billet Ar-15 Side Charging Upper Receiver - Slick Side - .458 Socom Compatible

Upper Receiver

Cross Machine Tool Upur-3A Billet Side Charging

Proof Research 6mm Arc Ar-Type Ar-15 Barrel - Rifle Length - Stainless Steel - .750" - 18"

Barrel

Proof Research 6mm ARC AR-Type

from $574.99

Cross Machine Tool upper and Proof Research barrel compatibility

Yes, they fit

The Cross Machine Tool Upur-3A Billet Side Charging works with the Proof Research 6mm ARC AR-Type. 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 upper and Proof Research barrel

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

Barrels builders put on the Cross Machine Tool Upur-3A Billet Side

Share of builds with the Cross Machine Tool Upur-3A Billet Side and any barrel

Upper Receivers builders put under the Proof Research 6mm ARC AR-Type

Share of builds with the Proof Research 6mm ARC AR-Type and any upper

  • Cross Machine Tool Upur-3A Billet Side

    Of upper picks
    0%
    Median paid
    n/a

  • Proof Research 6mm ARC AR-Type

    Of barrel picks
    0.5%
    Median paid
    $578
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 upper and Proof Research barrel

The part builders pick most often in each slot alongside these two, checked against both. Parts that conflict are left out.

Lower Receiver

Handguard

Charging Handle

Pistol Grip

Trigger

Bolt Carrier Group

Buffer

Gas Block

Muzzle Device

Buffer Tube Assembly

Light

Cross Machine Tool Upur-3A vs Proof Research 6mm ARC AR-Type: specs and prices

Cross Machine Tool Upur-3AProof Research 6mm ARC
Best pricen/a$574.99 at Ammunition Depot
Storesn/a5 of 6 in stock
AssemblyCompleten/a
PlatformAR-15n/a
Caliber.458 SOCOM6mm ARC
Receiver TypeSlick Siden/a
Gas Systemn/aRifle
Lengthn/a18
Twistn/a1:7 5R
Contourn/aSPR
Threadn/a5/8x24
Weightn/a2.14

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.

Cross Machine Tool Upur-3A Billet Side Charging

No store lists it today.

Proof Research 6mm ARC AR-Type

Price history, last 90 days

  • Proof Research 6mm ARC AR-Type: lowest $493.49 on Aug 10, highest $649.99 on Sep 27 over the last 90 days.

Barrels frequently paired with the Cross Machine Tool Upur-3A Billet Side

Most picked next to it in real builds. Only parts our rules say fit the Cross Machine Tool Upur-3A Billet Side are listed.

Upper Receivers frequently paired with the Proof Research 6mm ARC AR-Type

Most picked next to it in real builds. Only parts our rules say fit the Proof Research 6mm ARC AR-Type are listed.