It can be done in 10 minutes. Unscrew the two action screws on the original rifle, screw the action/barrel on the aluminum bedding, put some locktite on the screws, put the two halves together, you're done!
I love mine, would never go back to the original stock.
Gripes:
1. Came with a 5 round mag, had to spring the extra frogs for a 10 round mag. More useful, sure as hell looks nicer.
2. Cheek weld, namely it's hard for me to get a proper one. An adjustable cheek piece will help, which brings us to the 3rd gripe:
3. Price. Extra spacer for the stock costs around $50, the cheek piece,$100 plus.
4. The soft rubber butt pad is very effective, it's however contoured, due to its shape and material it tends to stick and hang on clothing.
5. The four point sling loop attachment (two on each side) are like an after thought. They're noisy, you'd be hard pressed to find an off the shelf sling that works well with it, our you can buy AI's sling ($50)