Does the Rock River Arms Completed Pistol A4 work with the Geissele Automatics Reliability?
Upper Receiver
Rock River Arms Completed Pistol A4 .223/5.56mm 10.5 Inch
from $549.99
Bolt Carrier Group
Geissele Automatics Reliability Enhancement KIT H3
from $455.00
Rock River Arms upper and Geissele bolt carrier group compatibility
Yes, they fit
The Rock River Arms Completed Pistol A4 .223/5.56mm works with the Geissele Automatics Reliability Enhancement KIT. 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.
Rock River Arms Completed vs Geissele Automatics: specs and prices
| Rock River Arms Completed | Geissele Automatics | |
|---|---|---|
| Best price | $549.99 at Optics Planet | $455.00 at BattleHawk Armory |
| Stores | 0 of 1 in stock | 0 of 4 in stock |
| Assembly | Complete | n/a |
| Platform | AR-15 | n/a |
| Caliber | 5.56 NATO | n/a |
| Receiver Type | A4 | n/a |
| Length | 10.5 | n/a |
| Cartridge | n/a | 5.56 NATO |
| Style | n/a | M16 Bolt Carrier |
| Finish | n/a | Black |
Both for $1004.99 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.
Price history, last 90 days
- Rock River Arms Completed Pistol A4: lowest $519.99 on Aug 5, highest $549.99 on Jul 5 over the last 90 days.
- Geissele Automatics Reliability: lowest $444.60 on Jul 5, highest $494.00 on Jul 20 over the last 90 days.