Here's another item that I use myself, and I like it a lot, The Sierra Precision SPR grip.
Hard plastic, right hand only. These are made for medium to large hands, and will also fit Barrett 50BMG rifles, the Tubbs rifle, the AR50, and most any other rifle that uses an AR15 style grip. These work great on a benchrest or target rifle, but I've been using them on my carbines with great results.
I've got around 10 in stock, and I'll get more when these run out.$28.00 + $5.00 shipping.
Combine an order from one of my other ads and save on shipping.