Does the American Defense Uic Billet work with the Geissele Automatics Super Duty MOD1?

American Defense lower and Geissele upper compatibility

Yes, they fit

The American Defense Uic Billet works with the Geissele Automatics Super Duty MOD1 Upper 5.56. Our compatibility rules found no conflict between them.

This exact setup has been built more than once on GunPartPicker.

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 American Defense lower and Geissele upper

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

Upper Receivers builders put on the American Defense Uic Billet

Share of builds with the American Defense Uic Billet and any upper

Lower Receivers builders put under the Geissele Automatics Super Duty MOD1

Share of builds with the Geissele Automatics Super Duty MOD1 and any lower

  • American Defense Uic Billet

    Of lower picks
    0.1%
    Median paid
    $399
  • Geissele Automatics Super Duty MOD1

    Of upper picks
    0.2%
    Median paid
    $1048
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 American Defense lower and Geissele upper

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

American Defense Uic Billet vs Geissele Automatics Super Duty: specs and prices

American Defense Uic BilletGeissele Automatics Super
Best price$399.00 at Primary Arms$1325.00 at Optics Planet
Stores1 of 1 in stock1 of 5 in stock
AssemblyStrippedComplete
PlatformAR-15AR-15
Trigger Pin.154n/a
FinishHardcoat Anodizedn/a
Calibern/a5.56 NATO
Receiver Typen/aA4
Lengthn/a14.5
Weight11n/a

Both for $1724.00 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.

American Defense Uic Billet

Geissele Automatics Super Duty MOD1 Upper 5.56

Price history, last 90 days

  • American Defense Uic Billet: lowest $399.00 on Jul 7, highest $399.00 on Jul 7 over the last 90 days.
  • Geissele Automatics Super Duty MOD1: lowest $1047.51 on Jul 6, highest $1325.00 on Aug 15 over the last 90 days.

Upper Receivers frequently paired with the American Defense Uic Billet

Most picked next to it in real builds. Only parts our rules say fit the American Defense Uic Billet are listed.

Lower Receivers frequently paired with the Geissele Automatics Super Duty MOD1

Most picked next to it in real builds. Only parts our rules say fit the Geissele Automatics Super Duty MOD1 are listed.