LEAD TIME: Ships within 3-5 business days
 
The LDR1.5 is the updated version of our extremely rugged and durable rail. Our LDR1 was already one of the strongest MLOK rails in its class currently available. Taking into account recent testing and customer feedback, we saw an opportunity to implement a few improvements to the design. We have increased the rigidity of our rail by approximately 8% from the original LDR1 and now utilize stronger T27 mounting bolts and a beefier locking plate.    
 
Strength and durability are the two main points of focus that went into the development of our rail and will continue to be the focus going forward as the LDR Series of rails expands.
 
We have made some minor changes to our extrusion that aided in more consistent machining and helped provide additional strength. The material for our rail is Aerospace Grade 6061-T6 Aluminum and was chosen for its strength-to-weight ratio and for its better ductility compared to 7075-T6 used for other rails on the market. This material allows the LDR1.5 the ability to tolerate high stress, in the event it were applied suddenly, without cracking.     
 
As the use of night vision and laser aiming devices has become more mainstream or common use, ensuring end users have a stable and rigid platform to mount lasers, offset red dots, and bipods is important. Why is this important? It is so any device you mount to our rail, that is used to aid in accurate shot placement, maintains its zero. We wanted to reduce the amount of shift that external forces can have on your sighting systems. So whether you are standing, braced off of a barrier/cover, or prone possibly using a bipod, you can have confidence that your aiming devices will still provide an accurate POA.     
 
By removing unnecessary MLOK slots in specific locations, we were able to provide added strength, lengthwise, to our MLOK rail. This is one way we ensure external forces (i.e. gripping or bracing against a barrier), would have little to no effect on your laser's zero. Another point of strength comes from the LDR's skeletal structure within its inner diameter (ID). Instead of cutting the MLOK flats (inner MLOK feature) as continuous channels from front to rear, each MLOK slot has its own inner flat. This leaves a "frame" throughout the ID of our rail.
 
The Mod4 Barrel Nut is the sturdy foundation for our LDR Series rails. It is 1 ounce lighter than its original predecessor and has additional index points for our barrel nut wrench. It is machined from chromium-molybdenum alloy (the same steel used in gearing and engine components) and finished in a milspec manganese phosphate coating (MIL-DTL-16232H). When choosing the material for our barrel nut, we wanted to ensure the rigid design of our rail had an appropriately solid foundation.
 
The Indexing Pin Pocket is back due to popular demand. The indexing pin is a great added feature to assist our anti-rotation wings and help with the rail's alignment during installation (when paired with our soon-to-be-released Gen2-E Upper Receiver).       
    - The Indexing Pin will come with our Gen2-E Upper Receiver 
 
Our mounting hardware has been upgraded as well. The LDR1.5 now utilizes T27 Alloy Steel bolts and a beefier Locking Plate. The Torx drive heads of our bolts reduce the chances of stripping during installation or removal for maintenance. Our mounting bolts sport a fine thread pitch, preferred for use in firearms components as they are less likely to come loose when heat and vibration are present.   
 
In the realm of cosmetic updates that have been done, we have scalloped the outer edges of the picatinny section of the LDR1.5. We have done this to help improve the anodizing process due to the harsher, pointed edge of the LDR1 sometimes caused small bare spots in the anodizing. We didn't like this as it created a lot of waste (good parts that couldn't be sent to end users) and felt the scallops would be a nice touch.   
 
Each length of the LDR Series rail extends as close to the muzzle as it can while leaving just enough space for most commonly used suppressors to be mounted. This allows end users to maintain their normal support hand grip even when mounting various accessories (i.e. lasers, pressure pads, weapon-mounted lights, etc). 
 
ANODIZED LDR1.5 COLORS: BLACK / FDE / RRG Type III Class II
 
Specs: 
NOT COMPATIBLE w/ BCM MK2 Upper Receiver due to the "thicker" front shape of the receiver.
Machined from Aerospace Grade 6061-T6 Aluminum Alloy
Integrated QD Sockets at the rear
2.18" Mod4 Barrel Nut: 4142PH Steel w/ Heavy Manganese Phosphate Finish per MIL-DTL-16232H, Class 1
Torque Spec: 46 ft/lbs
Locking Plate: ASTM A572 High Strength/Low Alloy Steel w/ Heavy Manganese Phosphate Finish MIL-DTL-16232H, Class 1 
Mounting Bolts: T27 Alloy Steel Bolt w/ Black Oxide Finish
Torque Spec: 35-37 in/lbs
Actual Length: 10.75"   
For use w/ 11.5" Barrels
Inner Diameter: 1.33"
Outer Diameter: 1.55"
Indexing Pin Pocket Equipped: Yes
Rail Weight: 11.1 oz. (15.7 oz. w/ Barrel Nut & Hardware)
Compatible w/ MLOK accessories
Comes w/ Mod4 Barrel Nut (x1), Mounting Screws (x2), Locking Plate (x1), Barrel Nut Wrench (x1), & Traction Tape Pack (x1)