Does the Harrington & Richardson 635 Stripped work with the FailZero AR9?
Lower Receiver
Harrington & Richardson 635 Stripped Lower
from $259.99
Bolt Carrier Group
FailZero AR9
from $132.03
Harrington & Richardson lower and FailZero bolt carrier group compatibility
Yes, they fit
The Harrington & Richardson 635 Stripped Lower works with the FailZero AR9. 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 Harrington & Richardson lower and FailZero bolt carrier group
Backed by thousands of qualified builds that have both a lower and a bolt carrier group.
Share of builds with the Harrington & Richardson 635 Stripped and any bolt carrier group
- This pairFailZero AR944%
Share of builds with the FailZero AR9 and any lower
- This pairHarrington & Richardson 635 Stripped Lower17%
Harrington & Richardson 635 Stripped
- Of lower picks
- 0.1%
- Median paid
- $260
FailZero AR9
- Of bolt carrier group picks
- 0.3%
- Median paid
- $131
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 Harrington & Richardson lower and FailZero bolt carrier group
The part builders pick most often in each slot alongside these two, checked against both. Parts that conflict are left out.
Charging Handle
Upper Receiver
Pistol Grip
Stock & Brace
Handguard
Fits both
Muzzle Device
Suppressor
Harrington & Richardson 635 vs FailZero AR9: specs and prices
| Harrington & Richardson 635 | FailZero AR9 | |
|---|---|---|
| Best price | $259.99 at Palmetto State Armory | $132.03 at BattleHawk Armory |
| Stores | 1 of 1 in stock | 4 of 4 in stock |
| Assembly | Stripped | n/a |
| Platform | AR-9 | n/a |
| Caliber | 9mm | n/a |
| Color | Black | n/a |
| Cartridge | n/a | 9mm |
| Style | n/a | Pistol Caliber Blow Back Carrier |
| Finish | n/a | Nitride |
Both for $392.02 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
- Harrington & Richardson 635 Stripped: lowest $259.99 on Jul 12, highest $259.99 on Jul 12 over the last 90 days.
- FailZero AR9: lowest $132.03 on Jul 5, highest $179.99 on Aug 28 over the last 90 days.
Bolt Carrier Groups frequently paired with the Harrington & Richardson 635 Stripped
Most picked next to it in real builds. Only parts our rules say fit the Harrington & Richardson 635 Stripped are listed.
Lower Receivers frequently paired with the FailZero AR9
Most picked next to it in real builds. Only parts our rules say fit the FailZero AR9 are listed.
Spike's Tactical Stripped
Fits, check noteCheck fit
