Does the Yankee Hill Machine .223 Rem/5.56 Flat work with the FailZero AR9?
Upper Receiver
Yankee Hill Machine .223 Rem/5.56 Flat Top Stripped
from $7.99
Bolt Carrier Group
FailZero AR9
from $132.03
Yankee Hill Machine upper and FailZero bolt carrier group compatibility
Yes, they fit
The Yankee Hill Machine .223 Rem/5.56 Flat Top works with the FailZero AR9. 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.
Yankee Hill Machine .223 vs FailZero AR9: specs and prices
| Yankee Hill Machine .223 | FailZero AR9 | |
|---|---|---|
| Best price | $96.29 at Guns.com | $132.03 at BattleHawk Armory |
| Stores | 4 of 6 in stock | 4 of 4 in stock |
| Assembly | Stripped | n/a |
| Platform | AR-15 | n/a |
| Caliber | 5.56 NATO | n/a |
| Receiver Type | A3 | n/a |
| Cartridge | n/a | 9mm |
| Style | n/a | Pistol Caliber Blow Back Carrier |
| Finish | n/a | Nitride |
Both for $228.32 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.
Price history, last 90 days
- Yankee Hill Machine .223 Rem/5.56 Flat: lowest $96.29 on Jul 5, highest $108.99 on Aug 2 over the last 90 days.
- FailZero AR9: lowest $132.03 on Jul 5, highest $179.99 on Aug 28 over the last 90 days.