Holosun HS403B Red Dot Sight prowin these Gen 2 followers are

these Gen 2 followers are double stacked but are designed with an articulated hinge and cutouts to allow it to feed all the way to the top of the magazine channel instead of leaving BBs in the magazine

based on user preference

VFC Umarex Glock system (green gas system

BBA will install and inspect all components for proper air seal

3 Blow-Back Series

Holosun HS403B Red Dot Sight prowin these Gen 2 followers areNot available for US customers. If you place an order containing any Holosun items to be shipped to the US, it will be cancelled and a 5% cancellation fee applied. OVERVIEW The 403B is a small compact micro red dot optic. Employing Holosuns LED technology, the lifetime for one CR2032 battery can be up to 5 years. This optic features our Shake Awake technology that powers the optic on with slight movement of the 403B. It may be installed on various