CZ USA 02366: Using the famous Boyd's AT-ONE stock as its basis, this 457 Varmint variant makes an ideal trainer for the whole family. With the push of a button, the length of pull can be adjusted from 12.5" to 14.25". Comb height is similarly adjustable, with 5/8" of rise available. The thick laminate stock provides an excellent, rigid platform from which to work, and the 16.5" threaded heavy barrel makes fitting a suppressor easy.