Hi BillyTell,
We're using after market Buttstocks only and these are sold by many different company's such as Brownell's Gun Parts, Midway and to many others to even count.
It was never my intent to change the Buttstock on my TAC15i. I only started looking into it after I ran into the problem of the manufactures stock not fitting my shoulder when I would attempt to look through the scope that came with the PSE TAC15i Package. The scope uses a long eye relief of 4.5 inches, which pushes your head further back on the stock. This left at least a 1 inch gap between my shoulder and the stock, when the buttstock was fully extended.
Maybe we should talk about how to properly position a scope for a shooters eye, then everybody can determine if they are comfortable with their own set up?
1. Generally, it's recommended that you place your scope upon your mounting rails, but do not tighten any screws that would lock it in place.
2. Next, Close your eyes and shoulder your rifle or crossbow with your cheek in it's most comfortable position against the stock or cheek rest.
3. Now open your eyes without moving your head and look through the scopes eye piece. Do you have a full clear picture through the eye piece or are your edges darkened?
4. If anything is darkened or not visible then you need to move the scope forward or backward on its base, to support your visual needs.
5. If this can't be accommodated by the mounting rail, due to not enough space, then you will need to change either the eye relief distance, the length of your Buttstock or both.
I learned later that I could have changed out just my scope to a shorter eye relief and it would have solved my problem, but I ended up doing both and love the custom fit and feel that I now have. Adding an inexpensive cheek rest also makes for a more comfortable, more consistent alignment each time you shoulder your weapon.
Jon