Warning

 

Close

Confirm Action

Are you sure you wish to do this?

Confirm Cancel
BCM
User Panel

Site Notices
Posted: 4/27/2021 10:12:51 PM EDT
Anything weird needed? How about a BRN-180 lower? Will the MP5 stocks work with an AR lower?
Link Posted: 4/28/2021 8:27:26 AM EDT
[#1]
tag
Link Posted: 4/28/2021 9:09:31 AM EDT
[#2]
You'll need the Sig MCX adapter because the recoil assembly sits higher than the rear of a standard USGI lower.

The MP5 stock will attach but will not collapse, kind of defeating the point.
Link Posted: 4/28/2021 9:11:52 AM EDT
[#3]
I don't know about the BRN 180 specifically, but all I needed to put an MCX Virtus upper on an ADM UIC lower (Wilson Combat TR-TTU-3G trigger) was the MCX stock adapter.  I've heard some triggers don't work with the Virtus uppers.

MCX Stock Adapter
Link Posted: 4/28/2021 9:37:14 AM EDT
[#4]
Quoted:
You'll need the Sig MCX adapter because the recoil assembly sits higher than the rear of a standard USGI lower.

The MP5 stock will attach but will not collapse, kind of defeating the point.
View Quote

Which adapter? I see stock adapters mentioned like in the post below yours is that what you’re talking about or is there another adapter?
Link Posted: 4/28/2021 7:36:31 PM EDT
[#5]
Discussion ForumsJump to Quoted PostQuote History
Quoted:

Which adapter? I see stock adapters mentioned like in the post below yours is that what you're talking about or is there another adapter?
View Quote

Posted right above - https://www.sigsauer.com/mcx-stock-adapter.html

KNS also makes one too.  looks like that won't work
Link Posted: 4/28/2021 10:00:19 PM EDT
[#6]
Quoted:

Posted right above - https://www.sigsauer.com/mcx-stock-adapter.html

KNS also makes one too.
View Quote

The KNS ONE doesn’t appear to stick up above the receiver.
Link Posted: 4/28/2021 10:32:17 PM EDT
[#7]
The MCX upper is not compatible with the KNS plug.
Close Join Our Mail List to Stay Up To Date! Win a FREE Membership!

Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. One new winner* is announced every week!

You will receive an email every Friday morning featuring the latest chatter from the hottest topics, breaking news surrounding legislation, as well as exclusive deals only available to ARFCOM email subscribers.


By signing up you agree to our User Agreement. *Must have a registered ARFCOM account to win.
Top Top