Patent ID: 9194641
Filing Date: 2015-11-24
Classification: F41A

Abstract:
1. An alignment and locking assembly, comprising: an alignment tab including: a barrel extension including: a proximal end, the proximal end defining a slot configured to matingly receive the engagement surface, wherein the feed ramp further includes a guide portion configured to guide cartridges and wherein at least 25 percent of the guide portion is received within the slot when the engagement surface abuts the slot, the alignment tab is configured to be removably coupled to a receiver of a firearm, the feed ramp is oriented at an angle between 30 degrees and 50 degrees relative to an axis parallel to an axis defined by a bore of the barrel extension, and the proximal end of the barrel extension further includes a plurality of guide surfaces and alternating ramps and shoulders extending proximally from the guide surfaces, the ramps and shoulders configured to allow rotation of the barrel extension in a first direction when the alignment tab abuts the barrel extension and to not allow rotation of the barrel extension in a second direction, the second direction being opposite the first direction.