Warning

 

Close
Confirm Action

Are you sure you wish to do this?

Cancel Confirm
AR15.COM
AR Sponsor
2/27/2026 1:04:29 AM EDT
[Last Edit: doolz][Edited]
Just grabbed an M2 from Thoroughbred Armament and mine came with an extended battery cap. I'm looking at it and it doesn't seem to have a through connector to run two 1/3N batteries but I could be wrong.

Wet Worx's site says it extends the battery life so I'm assuming you can stack batteries.

Is that what it is for? Found an old archived thread for reference here but still a bit confused on the placement/install.
Be courteous. Return Feedback.
2/27/2026 1:26:40 AM EDT
[#1]
Original one basically just held an extra battery.    Someone makes a 123 battery conversion though.  Putting two batteries in series would double your voltage.
If you are putting a lot of effort into arguing with me, you are probably really just wasting your time, sorry.
2/27/2026 1:29:38 AM EDT
[#2]
https://www.ar15.com/forums/ar-15/Looking-for-owners-of-Aimpoint-PRO-s--Comp-M2-s--M3-s-or-9000-s/18-790210/

If you are putting a lot of effort into arguing with me, you are probably really just wasting your time, sorry.
2/27/2026 1:41:04 AM EDT
[#3]
Quote History

Looks like it's backordered but that is a cool concept.

From the research I'm seeing it looks like the battery cap extender is just an extra storage slot unless otherwise...
Be courteous. Return Feedback.
2/27/2026 7:25:45 AM EDT
[#4]
I had considered getting 2 of those adaptors for my older CompML2s, but now the website says compatible with 2015+ optics.  I've gotten no answer as to whether earlier CompML2s are compatible.

2/27/2026 7:26:21 AM EDT
[#5]
Extra on board storage.
2/27/2026 7:42:49 AM EDT
[#6]
Quote History
Originally Posted By billclo:
I had considered getting 2 of those adaptors for my older CompML2s, but now the website says compatible with 2015+ optics.  I've gotten no answer as to whether earlier CompML2s are compatible.

View Quote

@locolife
2/27/2026 8:37:43 AM EDT
[#7]
Quote History
Originally Posted By TGWLDR:
Extra on board storage.
View Quote

Thank you sir!
Be courteous. Return Feedback.
2/27/2026 5:49:14 PM EDT
[#8]
It just holds an extra battery.
I wanted a mission, and for my sins, they gave me one.
No rules today, sport…just orders.
It’s not about how many people you kill, it’s about how many you save.
2/27/2026 6:00:02 PM EDT
[Last Edit: BringbacktheCrusades][Edited] [#9]
I just ordered a Comp M4s from them myself
2/27/2026 10:04:20 PM EDT
[#10]
Are they still making the CompM2?
"Whisky for the gentlemen that like it. And for the gentlemen that don't like it - Whisky!" -Alec Guinness as MAJ (acting Colonel) Jock Sinclair, D.S.O., M.M. "Tunes of Glory"
4/29/2026 5:31:20 PM EDT
[#11]
Late reply...

Aimpoint is no longer manufacturing the Comp M2. You can find a surplus one through Thoroughbred Armament or Wet Worx.

I personally don't have any experience with Wet Worx but I have multiple purchases through Thoroughbred and they are excellent.
RIP EE.
Be courteous.
Return Feedback.
4/29/2026 8:25:23 PM EDT
[#12]
Quote History
Originally Posted By Bklyn_Irish:
Are they still making the CompM2?
View Quote

Discontinued in 2012.
5/8/2026 9:05:49 AM EDT
[#13]
It's just an extra battery compartment. The second battery does not do anything until you install it.
7/15/2026 2:54:10 AM EDT
[#14]
Sorry for the extremely late reply. If your battery cover looks like the one pictured below, the adaptor will work.

Sign up to continue the discussion

Create a free account to share your thoughts, follow topics, and connect with the AR15.COM community.

Already a member? Sign In

AR Sponsor