Quick release holster

A holster assembly, comprising:

• a holster body having an interior shaped to receive a handgun therein, and an entrance to the interior opposite a forward end of the holster body, wherein a longitudinal axis is defined through the interior between the entrance and the forward end;
• an ejection port restraint pivotally connected to the holster body, the ejection port restraint including a latch and being biased toward an obstruction position at which the latch extends into the interior for engaging the latch with an ejection port of the handgun, wherein the ejection port restraint pivots around an axis parallel to the longitudinal axis through the interior;
• a release device mounted on the holster body and configured to actuate the ejection port restraint towards a non-obstruction position thereof, in response to a single movement of the release device by a user to allow the handgun to be withdrawn from the holster body and wherein the release device is configured to slide by forward force against a rearward biased force from a rearward restraint locking position to a forward restraint releasing position, wherein the release device comprises a release lever that extends laterally outward from a side of the holster body for access by a thumb of a user;
• and
• a top cover affixed to an exterior portion of the holster body configured to cover at least a portion of the release device.