Does the Cross Machine Tool UPUR-1LH Billet Left work with the PSA 5.56 Full-Auto Nitride MPI?

upper and Palmetto State Armory bolt carrier group compatibility

Yes, they fit

The Cross Machine Tool UPUR-1LH Billet Left Handed works with the PSA 5.56 Full-Auto Nitride MPI. 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.

Cross Machine Tool UPUR-1LH vs PSA 5.56 Full-Auto Nitride MPI: specs and prices

Cross Machine Tool UPUR-1LHPSA 5.56 Full-Auto Nitride
Best price$198.00 at AR15 Discounts$89.99 at Palmetto State Armory
Stores2 of 3 in stock1 of 1 in stock
AssemblyStrippedn/a
PlatformAR-15n/a
Receiver TypeBilletn/a
Cartridgen/a5.56 NATO
Stylen/aFull-Auto
Finishn/aNitride

Both for $287.99 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.

Cross Machine Tool UPUR-1LH Billet Left Handed

PSA 5.56 Full-Auto Nitride MPI

Price history, last 90 days

  • Cross Machine Tool UPUR-1LH Billet Left: lowest $198.00 on Jul 5, highest $198.00 on Jul 5 over the last 90 days.
  • PSA 5.56 Full-Auto Nitride MPI: lowest $69.99 on Jul 31, highest $89.99 on Aug 11 over the last 90 days.