The Heckler and Koch HK416 D145 22LR Semi Auto rifle is built to a high standard. The rifle feels very robust with its metal upper and lower receivers, the operation of the rifle is as close as possible to its big brother making it very realistic. Most of the pattern 22LR rifles could be improved but the HK416 is built for durability and authenticity and as such it is probably one of the best available, certainly in this price bracket. The rifle has a removable front sight which is adjustable for elevation, the removable rear sight is adjustable for windage and elevation allowing a high level of accuracy to be achieved. An adjustable stock has been fitted allowing the gun to be used comfortably in a range of shooting positions. The HK416 is a great base for building the tactical system of your dreams. It comes out of the box with four Picatinny rails: on top, a full rail enables you to easily attach your favourite sighting or optics system, while on either side and on the bottom of the fore-end additional rails let you add other accessories such as grips, tactical lighting and lasers. Supplied with a 20 round magazine. 1/2" UNF Adaptors are available separately allowing a sound moderator to be attached if desired.