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Yankee Hill Machine Flip Up Gas Block with .750 Bore with Bayonet Lug and Sling Mount
Our Price: $105.00

This sight serves as a gas block and also includes a flip-up sight. Flip up sights are perfect for back-up or for use as a co-witness with optics. The flip-up sight can easily be locked into position or folded down when not in use. Includes a bayonet lug and sling mount. Material: Steel with manganese phosphate finish.
Yankee Hill Machine Flip-Up Front Sight
Our Price: $95.00

Detachable front sight, aluminum, black anodized. Sight mounts to a railed handguard and can fold down at any time it does not need to be used.
SI Defense Iron Front Sight with .750 Bore
SI Defense Iron Front Sight with .750 Bore and Bayonet Lug, Stripped
Our Price: $45.00

Forged iron front sight base with bayonet lug, stripped, with .750" bore. Manganese phosphate coated per Mil-DTL-16232G.
Yankee Hill Machine Flip-Up Rear Sight
Yankee Hill Machine Flip-Up Rear Sight
Our Price: $110.00

Heavy-duty, steel construction makes these emergency rear flip sights the tactical shooter’s choice for LE and military tasks requiring a compact, backup, sight system of superior strength and dependability. Deploys easily with the flick of your thumb; disengages down, out of your sight path when not in use by depressing the spring-loaded pushbutton. Extra thick, protective ears guard against blows that could potentially bend or break the sight post or aperture. Solid clamp with large crossbolt provides rock solid attachment to Weaver or Picatinny rail systems. Knurled and slotted, quick-release thumbscrew makes sight easy to install/remove. Rear Flip Sight's low-profile design attaches to A4 flattop receivers and regulates correctly with standard, M16/M4 front sights, as well as all Yankee Hill front sights. Rugged, steel base features an aluminum stem to keep weight to a minimum. Deploys instantly with thumb pressure. Large, knurled, screw head provides 1⁄2 M.O.A. windage adjustment. Includes flip-style aperture with .065" and .200" diameter peepholes for short- and long-range accuracy.

SPECS: Steel, Mil-Spec phosphate coating. 1" (2.5cm) long, 1½" (3.8cm) wide, 1-3⁄8" (3.5cm) high when raised, 2.5 oz. (71 g) wt.
Yankee Hill Machine Q.D.S. Flip-Up Rear Sights Set
Yankee Hill Machine Q.D.S. Flip-Up Rear Sights Set
Our Price: $199.00

Spring-loaded sights deploy at the push of a button to provide instant backup sighting. Quick Deploy System locks securely and requires a firm, positive press of the button to deploy or retract the sight, so it won’t accidentally activate when bumped—these sights stay where you put them. Minimal profile when folded—only .435” high—with radiused edges and a smoothly curved front surface to prevent snagging on foliage, gear, or clothing. Crossbolt and side bar provide solid attachment to MIL-STD 1913 Picatinny or Weaver-style rail systems. All-aluminum construction is lightweight, yet plenty strong to handle the hard knocks of tactical operations, with a durable, scratch-resistant hardcoat anodized finish for extra surface strength. Front Sights have mil-spec A2 post that adjusts for elevation; same-plane alignment with rear sights. Available with thick, protective ears that shield the post or an H&K-style hood for even greater security. Rear Sight adjusts for windage with the easy-to-grasp knurled knob and is available with a small peep (.065"), a large peep (.200"), or a two-position, A2-style aperture that lets you flip between both peep sizes. Set contains the front sight with ears and the two-position rear sight.

SPECS: Aluminum, hardcoat anodized, matte black. All models 1” (2.5cm) deployed length, 1¼” (3.2cm) wide, .435” (11mm) folded height. Front Sight w/Ears – 2-1⁄8" (5.4cm) folded length, 1.420” (3.61cm) deployed height from top of base to top of blade. Front Sight w/Hood – 2.1” folded length, 1.360” (3.45cm) deployed height from top of base to top of blade. Rear Sight – 2¼” (5.7cm) folded length, 1.425” (3.62cm) deployed height from top of base to center of aperture. Available with .065” or .200” peep hole or dual-aperture with both-size peeps.

SPECS: Steel, Mil-Spec phosphate coating. 1" (2.5cm) long, 1½" (3.8cm) wide, 1-3⁄8" (3.5cm) high when raised, 2.5 oz. (71 g) wt.
Yankee Hill Machine Q.D.S. Flip-Up Rear Sight
Yankee Hill Machine Q.D.S. Flip-Up Rear Sight
Our Price: $117.00

Rear sight with dual peep.

Spring-loaded sights deploy at the push of a button to provide instant backup sighting. Quick Deploy System locks securely and requires a firm, positive press of the button to deploy or retract the sight, so it won’t accidentally activate when bumped—these sights stay where you put them. Minimal profile when folded—only .435” high—with radiused edges and a smoothly curved front surface to prevent snagging on foliage, gear, or clothing. Crossbolt and side bar provide solid attachment to MIL-STD 1913 Picatinny or Weaver-style rail systems. All-aluminum construction is lightweight, yet plenty strong to handle the hard knocks of tactical operations, with a durable, scratch-resistant hardcoat anodized finish for extra surface strength. Front Sights have mil-spec A2 post that adjusts for elevation; same-plane alignment with rear sights. Available with thick, protective ears that shield the post or an H&K-style hood for even greater security. Rear Sight adjusts for windage with the easy-to-grasp knurled knob and is available with a small peep (.065"), a large peep (.200"), or a two-position, A2-style aperture that lets you flip between both peep sizes. Set contains the front sight with ears and the two-position rear sight.

SPECS: Aluminum, hardcoat anodized, matte black. All models 1” (2.5cm) deployed length, 1¼” (3.2cm) wide, .435” (11mm) folded height. Front Sight w/Ears – 2-1⁄8" (5.4cm) folded length, 1.420” (3.61cm) deployed height from top of base to top of blade. Front Sight w/Hood – 2.1” folded length, 1.360” (3.45cm) deployed height from top of base to top of blade. Rear Sight – 2¼” (5.7cm) folded length, 1.425” (3.62cm) deployed height from top of base to center of aperture. Available with .065” or .200” peep hole or dual-aperture with both-size peeps.

SPECS: Steel, Mil-Spec phosphate coating. 1" (2.5cm) long, 1½" (3.8cm) wide, 1-3⁄8" (3.5cm) high when raised, 2.5 oz. (71 g) wt.
Yankee Hill Machine Q.D.S. Flip-Up Front Sight
Yankee Hill Machine Q.D.S. Flip-Up Front Sight
Our Price: $99.00

Front sight, "V" configuration with front sight post.

Spring-loaded sights deploy at the push of a button to provide instant backup sighting. Quick Deploy System locks securely and requires a firm, positive press of the button to deploy or retract the sight, so it won’t accidentally activate when bumped—these sights stay where you put them. Minimal profile when folded—only .435” high—with radiused edges and a smoothly curved front surface to prevent snagging on foliage, gear, or clothing. Crossbolt and side bar provide solid attachment to MIL-STD 1913 Picatinny or Weaver-style rail systems. All-aluminum construction is lightweight, yet plenty strong to handle the hard knocks of tactical operations, with a durable, scratch-resistant hardcoat anodized finish for extra surface strength. Front Sights have mil-spec A2 post that adjusts for elevation; same-plane alignment with rear sights. Available with thick, protective ears that shield the post or an H&K-style hood for even greater security. Rear Sight adjusts for windage with the easy-to-grasp knurled knob and is available with a small peep (.065"), a large peep (.200"), or a two-position, A2-style aperture that lets you flip between both peep sizes. Set contains the front sight with ears and the two-position rear sight.

SPECS: Aluminum, hardcoat anodized, matte black. All models 1” (2.5cm) deployed length, 1¼” (3.2cm) wide, .435” (11mm) folded height. Front Sight w/Ears – 2-1⁄8" (5.4cm) folded length, 1.420” (3.61cm) deployed height from top of base to top of blade. Front Sight w/Hood – 2.1” folded length, 1.360” (3.45cm) deployed height from top of base to top of blade. Rear Sight – 2¼” (5.7cm) folded length, 1.425” (3.62cm) deployed height from top of base to center of aperture. Available with .065” or .200” peep hole or dual-aperture with both-size peeps.

SPECS: Steel, Mil-Spec phosphate coating. 1" (2.5cm) long, 1½" (3.8cm) wide, 1-3⁄8" (3.5cm) high when raised, 2.5 oz. (71 g) wt.
GG&G Spring Actuated Flip Up Front Sight For Tactical Forearms
GG&G Spring Actuated Flip Up Front Sight For Tactical Forearms
Our Price: $99.99

The Newly Redesigned GG&G Spring Actuated Flip Up Front Sight For Tactical Forearms is the latest evolution of this terrific accessory.  Although specifically designed to provide the correct sight height when mounted on a tactical forearm, this sight can also be installed on gas blocks that are at the same height as the upper receiver. We have lightened it and in the process developed a less expensive method to CNC machine the components so that we could offer a better price to our customers.

With just a push of a button the front sight can quickly be deployed on target. With the introduction of the Spring Actuated A2 BUIS (Back Up Iron Sight) it was only a natural progression to provide our customers with an A2 flip up front sight with the same features and benefits. The sight not only springs into an on target position with just the push of the actuator button, but it also locks solidly into the upright on target position. Another push of the button and the lock is released allowing you to set the sight into the locked down position. The spring sight cannot be folded down without depressing the actuator button located on the left side of the sight base. This totally eliminates the possibility of accidentally lowering the sight during a tactical situation. With the actuator button located on the left side it can be easily operated with the off hand, leaving the fire control hand in the proper position.


This model is specifically manufactured to the proper sight height for mounting on a tactical forearm or can be installed on gas blocks that are at the same height as the upper receiver. Not only is it set for use on the AR15, but will co-witness when mounted to the tactical forearm of an AR-10. The sight stem of this version folds rearward. The dovetail front is easily installed and we even include the allen wrench for you to use.


To insure flexibility, we use standard military sight components in this combat ready sight. All models of the GG&G Spring Actuated Flip Up Front Sight are manufactured from 6061 T-6 aluminum and are bead blasted and hard coat anodized to provide a non-reflective, corrosion resistant matte black finish meeting mil-spec requirements. All edges have been dehorned for the operator's safety.
GG&G MAD Back Up Iron Sight With Ranging Aperture
GG&G MAD Back Up Iron Sight With Ranging Aperture
Our Price: $140.00

The MAD BUIS With Ranging Aperture was originally manufactured by GG&G under a contract with Picatinny Arsenal, and although it is ammunition and weapon specific, we decided that it was time to offer it to a broader market.

The adjustable back up iron sight has all of the same great features as the standard MAD BUIS (back up iron sight) such as its low profile, solid 4140 steel and 6061-T6 aluminum construction, solid locking detent with button release, and mil-spec finish. Unlike other adjustable sights, it has one important exception: it is also a ranging sight. The unique rotating multiple aperture disc has 5 apertures preset to specified distances. In particular, 0=25 and 200yds 3=300yds 4=400yds 5=500yds 6=600yds. A small window facing the shooter, as can be seen in the above photograph, provides a numerical cue as to the range. All apertures are the same diameter--.070" diameter. The apertures have been preset using the ballistic calculations for 55 grain through 62 grain ammunition used in the AR15/M16 16" carbine length weapon.

GG&G's rotating aperture sights go beyond the performance of a normal backup iron sight thanks to their low profile, snug installation, and field tested accuracy. Because our aperture rifle sights are designed for real world tactical use by police and military personnel, they have qualities that go beyond cheap imported knockoffs found elsewhere. The GG&G MAD backup iron sight with ranging aperture is a bestseller thanks to extensive word-of-mouth endorsements by marksmen and armorers around the globe, so you can count on it whether you're on the range or out in the field.