AR-15

[ray1970]

I didn't see anything in the original post saying he had an A2 stock. Besides, if the A2 stock is "too short" I doubt he'll find too many that are longer than that.

[Great-Kazoo]

I didn't see anything in the original post saying he had an A2 stock. Besides, if the A2 stock is "too short" I doubt he'll find too many that are longer than that.

He might have an A1 stock. Hey OP post a picture to clarify what you have.

[pistoleer44]

Here are a couple pix. I don't understand A1 or A2, I don't know the difference. I look at my stock, I do not see where a tool could be used to turn a unlocking nut. I'm lost.

[Great-Kazoo]

Here are a couple pix. I don't understand A1 or A2, I don't know the difference. I look at my stock, I do not see where a tool could be used to turn a unlocking nut. I'm lost.

That is an A2 stock. The nut was in reference to a collapsible stock. What you need is a stock spacer to give you another 1" LOP Cheaper than dirt is just one link Brownells and other vendors also carry this item. It is an easy install. Remove stock add spacer reinstall stock.
WARNING" There is a spring and detent that hold the rear take down pin in place. This assy will unexpectedly pop out and be forever lost in the nether worlds of your floor if not careful.
http://www.cheaperthandirt.com/product/ARR-545

[BPTactical]

If you do not want to pull the stock I know that extended buttplates/pads can be had, it just escapes me right now whom it would be.
You will lose the "trapdoor" feature of the stock.