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Posted: 1/16/2015 5:21:47 PM EST
[Last Edit: 1/17/2015 12:16:01 AM EST by 223spree]
I recently picked this rail for my MP5 clone. Problem is my
Comp M4s won't fit on it with the QRP mount.

I want to use this sight, what mount will work with this rail,
and mount?
Link Posted: 1/16/2015 11:37:59 PM EST
[Last Edit: 1/16/2015 11:38:32 PM EST by Col__Kurtz]
I can't find the model BT-21242 listed on the net, but I assume you're using a mount similar to BT-10266?

These were originally made to accommodate the Aimpoint T-1 with the original style trapezoid mount, although I believe newer versions fit the rectangular mount as well.

To use the M4s with QRP mount, you would need a purely picatinny mount, as least as long as the BT-21222.

Link Posted: 1/17/2015 12:16:55 AM EST
Col_Kurtz it was a typo... I meant the B&T 21241
Link Posted: 1/17/2015 1:00:37 AM EST
[Last Edit: 1/17/2015 1:03:06 AM EST by Col__Kurtz]
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By 223spree:
Col_Kurtz it was a typo... I meant the B&T 21241
View Quote


BT-21241 uses a Weaver style rail. That's probably why it won't fit.

http://www.brownells.com/.aspx/lid=10724/guntechdetail/Picatinny_Rails__Weaver_Rails__What_s_The_Difference_

Use the BT-21241 to mount an Aimpoint T-1/H-1.

Pick up a BT-21262-1 if you want to use the M4s. It's the same style long mount, but has picatinny rails.
Link Posted: 1/18/2015 1:54:43 PM EST
Sounds good.

One question, every pic I've seen with the 21262 has
the rear sight removed... Does the rear sight have to be
removed in order to use this rail?
Link Posted: 1/18/2015 2:06:58 PM EST
just use irons and rock it like ya stole it
Link Posted: 1/18/2015 3:36:05 PM EST
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By 223spree:
Sounds good.

One question, every pic I've seen with the 21262 has
the rear sight removed... Does the rear sight have to be
removed in order to use this rail?
View Quote


Should work just fine.

Like this:



You should only have to remove the rear sight if you want to install a BT-21288 extra long type rail.

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