A barrel-mountable accessory to couple to a muzzle end of a firearm barrel, including: a first side having an opening arranged to fit around the muzzle end of the barrel; and a second different side having a taper pin opening; and a taper pin insertable into the taper pin opening of the barrel-mountable accessory, wherein the taper pin includes: a length including a first region arranged to mate with a taper interface provided on the muzzle end of the barrel; the length further including a second region to contact a sidewall that defines the taper pin opening of the second side; and means for driving the taper pin into the taper pin opening, wherein the driving means is located on an end of the taper pin.

A firearm slide accessory includes a charging handle attachment including a first member and a second member. The first and second members are formed with one or more mounting holes through which pass one or more fasteners. The first member includes an illumination device.

A device implementable on a firearm includes a magazine funnel and a securing mechanism. The magazine funnel is configured to couple to an opening at a bottom of a grip of the firearm. The magazine funnel has a first side and a second side opposite the first side. The securing mechanism protrudes from the first side of the magazine funnel such that, when a gap related to the securing mechanism is expanded while the magazine funnel is coupled to the opening with the securing mechanism inserted into a void of the grip, the securing mechanism secures the magazine funnel to the grip of the firearm.

A trigger activated arm may use a piston moving within a cylinder to dampen gun bolt speed. In some embodiments, gun bolt motion increases pressure within the cylinder bore to dampen rearward gun bolt speed. The pressure may be high enough to unseat the cylinder creating a vent that cylinder fluid exits. In other embodiments, gun bolt motion decreases pressure within the cylinder bore to dampen forward gun bolt speed.

A trigger activated arm may use a piston moving within a cylinder to dampen gun bolt speed. In some embodiments, gun bolt motion increases pressure within the cylinder bore to dampen rearward gun bolt speed. The pressure may be high enough to unseat the cylinder creating a vent that cylinder fluid exits. In other embodiments, gun bolt motion decreases pressure within the cylinder bore to dampen forward gun bolt speed.

A pistol with aiming stripe has a frame, a slide operable to reciprocate on the frame, the slide having an elongated top surface, the slide top surface having a forward end and an opposed rear end, and an aiming stripe having a contrasting appearance relative to the slide top surface and extending along a medial path along the slide top surface from proximate to the front end to proximate to the rear end. The slide may include a front sight proximate to the front end and a rear sight proximate to the rear end, and the aiming stripe extending from the front sight to the rear sight. The slide may define an elongated medial recess receiving the aiming stripe. The aiming stripe may be a film applied to the slide. The aiming stripe may be an articulated surface.

A pistol with aiming stripe has a frame, a slide operable to reciprocate on the frame, the slide having an elongated top surface, the slide top surface having a forward end and an opposed rear end, and an aiming stripe having a contrasting appearance relative to the slide top surface and extending along a medial path along the slide top surface from proximate to the front end to proximate to the rear end. The slide may include a front sight proximate to the front end and a rear sight proximate to the rear end, and the aiming stripe extending from the front sight to the rear sight. The slide may define an elongated medial recess receiving the aiming stripe. The aiming stripe may be a film applied to the slide. The aiming stripe may be an articulated surface.

Implementations of an adapter plate system for mounting optical sights on a pistol are provided. An example adapter plate system for mounting optical sights on a pistol comprises: a pistol slide, the pistol slide includes an adapter interface, the adapter interface comprising a bottom surface that extends between a first end wall and a second end wall; and an adapter plate, the adapter plate includes a mounting surface on a top side thereof, the mounting surface is configured so that an optical sight can be attached thereto. The adapter plate is configured so that it can be rotated into position between the first end wall and the second end wall of the adapter interface.

Implementations of an adapter plate system for mounting optical sights on a pistol are provided. An example adapter plate system for mounting optical sights on a pistol comprises: a pistol slide, the pistol slide includes an adapter interface, the adapter interface comprising a bottom surface that extends between a first end wall and a second end wall; and an adapter plate, the adapter plate includes a mounting surface on a top side thereof, the mounting surface is configured so that an optical sight can be attached thereto. The adapter plate is configured so that it can be rotated into position between the first end wall and the second end wall of the adapter interface.

There is provided a handgun for aiming at a target. The handgun comprises a handgun body, a slide arranged to move with respect to the handgun body, a lens removably mounted on the slide, and a light source associated with the slide and positioned at the focal point of the lens, such that when a user aims the handgun at the target, light from the light source reflects from the lens to the user's eye, providing an infinity image of an illuminated dot over the target. The lens is removable from both of the slide and the light source.