Does the Daniel Defense M4A1 FSP 5.56x45mm work with the KAK Industry K-SPEC BCG w/Side Vent?
Upper Receiver
Daniel Defense M4A1 FSP 5.56x45mm 14.5"BBL Stripped Upper
from $899.99
Bolt Carrier Group
KAK Industry K-SPEC BCG w/Side Vent 5.56X45mm NATO Full
from $187.49
Daniel Defense upper and KAK Industry bolt carrier group compatibility
Yes, they fit
The Daniel Defense M4A1 FSP 5.56x45mm 14.5"BBL works with the KAK Industry K-SPEC BCG w/Side Vent 5.56X45mm. 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.
Daniel Defense M4A1 FSP vs KAK Industry K-SPEC BCG w/Side: specs and prices
| Daniel Defense M4A1 FSP | KAK Industry K-SPEC BCG | |
|---|---|---|
| Best price | $899.99 at Brownells | $187.49 at Ammunition Depot |
| Stores | 1 of 1 in stock | 4 of 5 in stock |
| Assembly | Complete | n/a |
| Platform | AR-15 | n/a |
| Caliber | 5.56 NATO | n/a |
| Receiver Type | M4 | n/a |
| Length | 14.5 | n/a |
| Cartridge | n/a | 5.56 NATO |
| Finish | n/a | Chrome |
Both for $1087.48 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
- Daniel Defense M4A1 FSP 5.56x45mm: lowest $749.99 on Jul 6, highest $899.99 on Jul 14 over the last 90 days.
- KAK Industry K-SPEC BCG w/Side Vent: lowest $179.99 on Jul 5, highest $244.99 on Sep 3 over the last 90 days.