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:
DOES NOT FIT:
Our 509T Plate has been tested to fit:
DOES NOT FIT:
Our RMR Plate has been tested to fit:
DOES NOT FIT:
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.
Please torque your screws to 15in/lbs
Please reference our Terms & Conditions. Due to the complexities of complying with the Federal warranty law, Langdon Tactical Technology, Inc. does not offer a written warranty. We continue to stand behind our products and services, and to care for our customers, but we cannot make guarantees or warranties of any kind. This general statement of policies and disclaimers is effective January 1, 2016.
Quality design, fit, and finish. I purchased the 509t model. Installation was simple and straightforward. I zeroed with Federal Tru-Ball. The irons appear to be zeroed at 10 yards using the stock 1301 front sight. There is no vertical adjustment, but the horizontal has firm clicks and adjusts easily using the rim of a 12 gauge shell.
Quality design, fit, and finish. I purchased the 509t model. Installation was simple and straightforward. I zeroed with Federal Tru-Ball. The irons appear to be zeroed at 10 yards using the stock 1301 front sight. There is no vertical adjustment, but the horizontal has firm clicks and adjusts easily using the rim of a 12 gauge shell.
