Geissele Automatics MK13 Super Modular Rail 13" MLOK Includes Gas Block Black Finish 05-559B

Geissele Automatics MK13, Super Modular Rail, 13",
The Geissele Automatics Super Modular Rail MK13 was designed to be a lightweight modular rail system that also provides you with Magpul M-LOK attachment points in several locations along the length of the rail. The MK13 features an ergonomic design, with a flexible and modular set up procedure. The free floating design is strong and rigid, and features an integrated full length top M1913 Picatinny rail section along with three rail sections located at the 3, 6, and 9 o'clock positions. Accessory rails are easy to install and do not require a gunsmith. However if you do not have the required tools or mechanical know how you should seek the help of an expert.

Specifications and Features:
Geissele Automatics Super Modular Rail AR-15 Free Float Hand Guard 05-559B
13" Super Modular Rail
MK13 with Magpul M-LOK attachment system
Picatinny rails sections at 3, 6, and 9 o'clock
Ergonomic
Free Floating
Modular
Lightweight, Strong and Rigid
Aircraft Grade Aluminum
Overall Height 2.02"
Inside Diameter 1.27"
Outside Diameter at the M-LOK Section 1.52"
Outside Diameter at the Picatinny Section 2.044
Overall Weight with Hardware 13.4oz
Matte Black Finish

Fits:
AR-15 Mil-Spec M4 Upper Receivers
Note: Compatibility with Billet Receiver Sets is unknown