A precision gas block assembly design by Dave Lauck which offers solutions and benefits to the AR-15 rifle and carbine system. This heavy duty steel multipurpose assembly allows for a flip up, flip down front sight tower which locks in the up and down positions. Flipping the sight up allows for iron sight use with a conventional rear, or forward mounted rear sight. Locking the front sight tower down allows for use of magnifying optics without a visible iron sight shadow in the optical sight picture.

The flip up front sight tower accepts commonly available front sight posts, or the D&L Sports™ heavy duty blade sight. Once the front sight is adjusted for the correct elevation, this tower design allows the sight to be locked in place. No more wobble, no more unauthorized adjustments.

The protective structure around the front sight blade was designed to serve as a close range, large target Halo Sight for the ultimate in iron sight speed. The rounded protective structure also allows the shooter to immediately locate the front sight blade when more precisely aimed iron sight shots are called for. The protective ears on conventional iron sights are so close to straight that they can be mistaken for the primary front sight blade during high speed iron sight shooting. This mistake will of course dramatically affect the bullets point of impact. The rounded protective structure on the D&L sight is so different in shape from the front sight blade that there will be no sighting confusion, even at high speed.

The multipurpose gas block attaches to lightweight barrels (.625") and to medium weight barrels (.750") by means of snugly encircling the barrel, then clamping in place with multiple 6 O'clock cross bolts. This assures a superior gas seal. No more gas leaks and the problems associated with gas leakage. No more wedge pins or conventional cross pin problems.

Cross bolts in the base of the block (not through the barrel) allows the block to be rotated a reasonable amount to help square up the sights. No more crooked front sight towers. No more rear sights adjusted all the way over to one side to compensate for an off center front tower. Once the sights are properly aligned, the block can be clamped down tight, then further lock screwed in place. No more tower movement. Heavy duty and field practical.

Operating gas pressure in the AR-15/M-16 series of firearms has always been an area of concern. Too much pressure slam cycles the gun and creates excessive recoil. Too little pressure does not allow the gun to fully and reliably function, or lock open after the last shot. Then you have the issue of a single gas port size having to accommodate different types of ammunition. Same problem; too much, or too little gas pressure may cause the firearm to operate at less than peak efficiency. Another feature of the multipurpose gas block allows the knowledgeable operator to tune the gas pressure of the firearm to achieve reliable operation, without excessive gas pressure and resulting extra recoil. This gas regulation feature is then lockable to assure the setting does not change until you want to readjust it for a different type of ammunition.

The D&L Sports™ multipurpose gas block/flip up front sight is professional grade equipment that must be installed by a skilled AR-15/M-16 gunsmith.

Prices available on request