Does the American Defense Mfg. work with the Geissele Automatics Super Duty MOD1 5.56?

Lower Receiver
American Defense Mfg.
from $383.76

Upper Receiver
Geissele Automatics Super Duty MOD1 5.56 NATO
from $1201.99
American Defense lower and Geissele upper compatibility
Yes, they fit
The American Defense Mfg. works with the Geissele Automatics Super Duty MOD1 5.56 NATO. 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 American Defense lower and Geissele upper
Backed by tens of thousands of qualified builds that have both a lower and an upper.
Share of builds with the American Defense Mfg. and any upper
- This pairGeissele Automatics Super Duty MOD1 5.56 NATO25%
Share of builds with the Geissele Automatics Super Duty MOD1 5.56 and any lower
- This pairAmerican Defense Mfg.4%
American Defense Mfg.
- Of lower picks
- 0%
- Median paid
- $384
Geissele Automatics Super Duty MOD1 5.56
- Of upper picks
- 0.1%
- Median paid
- $1026
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 Mfg. vs Geissele Automatics Super Duty: specs and prices
| American Defense Mfg. | Geissele Automatics Super | |
|---|---|---|
| Best price | $383.76 at KY Gun Company | $1201.99 at KY Gun Company |
| Stores | 1 of 4 in stock | 0 of 5 in stock |
| Assembly | Stripped | Complete |
| Platform | AR-15 | AR-15 |
| Caliber | 5.56 NATO | 5.56 NATO |
| Finish | Hardcoat Anodized | n/a |
| Color | Black | n/a |
| Length | n/a | 12.5 |
Both for $1585.75 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 Mfg.
Price history, last 90 days
- American Defense Mfg.: lowest $420.00 on Jul 5, highest $420.00 on Jul 5 over the last 90 days.
- Geissele Automatics Super Duty MOD1 5.56: lowest $1025.62 on Jul 6, highest $1325.99 on Aug 4 over the last 90 days.
Upper Receivers frequently paired with the American Defense Mfg.
Most picked next to it in real builds. Only parts our rules say fit the American Defense Mfg. are listed.
Lower Receivers frequently paired with the Geissele Automatics Super Duty MOD1 5.56
Most picked next to it in real builds. Only parts our rules say fit the Geissele Automatics Super Duty MOD1 5.56 are listed.


















