Running out of Iron Sight Adjustment before zero is achieved.

[jmreagan]

Did you notice what hand guard he is using? He'll have a tough time using a carry handle to clock it.

No, never heard of that rail. My post was meant for anyone that can use the info to align a rail that a detachable carry handle can be used on... I believe I mentioned quad rails and M-loks. If you or he cannot benefit from my post then don't use it. Others will however...

[GH41]

No, never heard of that rail. My post was meant for anyone that can use the info to align a rail that a detachable carry handle can be used on... I believe I mentioned quad rails and M-loks. If you or he cannot benefit from my post then don't use it. Others will however...

Thanks for the advice. If your yard needs raking I recommend getting a shovel and digging a hole... If you cannot benefit from my advice then don't use it. Others will however... Makes a lot of sense doesn't it?

[MOLON AABE]

[SOWT]

one of my friends takes lots of classes and it happens often with a new shooter.

Yep.
You'd be surprised how many people sign up for and intermediate or higher course without any experience.
The Company I worked for would contact you after registration to verify you knew how to shoot.

[556BlackRifle]

Go to BCM's site and look at the upper your student has. LINK Take a look at picure #6 and see commet below.

Optional Rail: ARMS #38 SPR Top Rail - This Rifle length SPR Straight top rail is a FULL Picatinny rail that connects the receiver to the forearm.

Hope this helps.