LTT Fastback Optic Mount

The Fastback Optic Mount is a purpose-built solution to add a red dot low to the receiver of your shotgun. Now available in three versions: Beretta 12GA (1301/A300), Beretta 20GA A300, and Mossberg 500/590! The optic sits as far back on the receiver as possible to make emergency reloads over the top of the receiver faster and easier, and to make it easier for the shooter to find and track the dot. 

The co-witnessed backup sight sits forward of the optic to limit obstructions to your sight picture. The sight itself is a pistol-style notch that is click-adjustable for windage in 1 MOA increments using the rim of a shotgun shell as a tool.  

All Fastback mounts are constructed of hard-coat anodized aluminum, and the rear sight adjustment mechanism is made of nitrided stainless steel for corrosion resistance in all climates. 

1301/A300 12GA 

Regulated for Federal Truball Low Recoil at 50 yards. Compatible with factory front sights and the LTT Super Duty Front Sight. 

Installation torque: 15 in/lbs 

A300 20GA

All three optic footprints mount using the factory RMR cut in the receiver for the most robust attachment possible. The Fastback mount raises the optic high enough that the front sight doesn’t obstruct your entire window like it will if you mount an optic onto the factory cut. The RMR mount screws directly into the receiver using custom screws. The rear sight is regulated for 7/8oz low recoil slugs at 25 yards. 

Installation torque: 19 in/lbs 

Mossberg 500/590  

Regulated for Federal Truball Low Recoil fired from 18.5 inch barrels with front rifle sights (like the sights on Mossberg 50765) at 25 yards. Mounts using 8-40 screws. Will not shoot to point of aim with the 20 inch barrel factory iron sights without adjusting the front sight height. 

Not tested on the Mossberg 940 or 990 semiauto shotguns. 

Installation torque: Plate to receiver: 20 in/lbs RMR to plate: 15 in/lbs 

Includes

Fastback optic mount, mounting screws, Torx driver 

Installed Weight (without optic): 1.5 oz 

Our ACRO Plate has been tested to fit: 

• Aimpoint ACRO P1 

• Aimpoint ACRO P2 

• Steiner MPS 

• Burris Fastfire E

DOES NOT FIT: 

• Lead and Steel Pandora PB3 

Our 509T Plate has been tested to fit: 

• Holosun 509T  

DOES NOT FIT: 

• Holosun 509 ACSS 

Our RMR Plate has been tested to fit: 

• Trijicon RMR 

• Holosun 407/507C 

• Holosun 508T 

• Holosun 407/507 Comp 

• Trijicon RCR [CAN BE MOUNTED, BUT DECK HEIGHT IS TOO TALL TO CO-WITNESS] 

DOES NOT FIT: 

• Trijicon SRO 

• Trijicon RMR HD 

• Trijicon RMRcc 

• Holosun 507 PROMAX 

DELIVERY TIMELINE: 

In stock and shipping

DISCLAIMER: We recommend that this product as well as all other firearms parts & kits sold by Langdon Tactical be installed by a competent gunsmith. No liability is expressed or implied for ANY damage or injury which may result from improper installation or use of this product. Installation of any firearm parts may limit or void the manufacturers warranty. We strongly recommend that the safety and operation of your modified handgun be thoroughly checked by an accredited gunsmith prior to use.