quad rails

UTG
MTU004 / MTU005 / MTU005E / MTU006 / MTU008
MODEL 4/15
QUAD RAILS
Made in USA
1
2
MODEL 4/15 RIFLE PART LIST
Bolt Assembly
Front Cap
Front Sight
UTG INNOVATIVE FREE FLOATING DESIGN
Robust Integral, Lightweight
One-piece Quad-rail Handguard
Handguard
Innovative Connector
to Ensure Firm Lock and
Quick Installation
Dual Alignment Pins for
Reliable and Precise Fitting
Innovative
Anti-rotation Tabs
Upper Receiver
Gas Tube
High-strength
Locking Screws
Flash Hider
Barrel
Solid and Precision Machined
Barrel Nut
Barrel Nut / Delta Ring
AFTER INSTALLATION
Handguard
Barrel
Magazine
Gas Tube
Lower Receiver
Butt Stock
Rivet
Connector
Barrel Nut
3
4
AR PISTOL APPLICATION
Slots: 10 on Top, 7 on Left/Right, 9 on Bottom
Includes 4 PCs Rail Covers
Fits AR Pistol with 7” Barrel
Compatible with Gas Tube and Piston System
MODEL 4/15 CARBINE APPLICATION
m
m
253
mm
106
MTU005E
Slots: 18 on Top, 15 on Left/Right, 17 on Bottom
Includes 12 PCs Rail Covers
Fits Carbine-length AR15
Compatible with Gas Tube and Piston System
mm
183
MTU005
10” Free Float
Quad Rails
MTU008
MTU005E
4” Free Float
Quad Rails
MTU008
7” Free Float
Quad Rails
MTU005
5
6
MODEL 4/15 MID-LENGTH APPLICATION
Slots: 23 on Top, 20 on Left/Right, 22 on Bottom
Includes 16 PCs Rail Covers
Fits Mid-length AR15 (Gas Tube Only)
Accommodates Low Profile Gas Block
MTU004
Slots: 31 on Top, 28 on Left/Right, 30 on Bottom
Includes 20 PCs Rail Covers
Fits Rifle-length AR15 (Gas Tube Only)
Accommodates Low Profile Gas Block
MTU006
m
5m
23
MODEL 4/15 RIFLE-LENGTH APPLICATION
9” Free Float
Quad Rails
MTU004
mm
318
13” Free Float
Quad Rails
MTU006
7
8
MODEL 4/15 FREE FLOATING QUAD RAILS
INSTALLATION GUIDE
1
Prepare the rifle, the mount and necessary
tools (a hummer, a punch, an AR15 upper
receiver vise block, an AR15 handguard
removal tool, an AR15 combo wrench
and a vise). Set up a comfortable working
environment.
Caution: Make sure firearm is not loaded.
Remove magazine and examine chamber.
Use safe handling procedures at all times.
3
2
Remove the original plastic handguard with a
handguard removal tool.
Remove the lower receiver with stock
assembly. Take out the bolt assembly.
4
Remove the Flash Hider by turning it
counterclockwise with an AR15 combo
wrench.
9
10
Max. torque value for
installing barrel nut
should not exceed
60ft.lbs.
5
Place the barrel on a well padded flat surface
securely. Punch the two pins at the bottom of
the front sight out with a hummer and a punch.
Remove the Front Sight with the Gas Tube,
and take out the Front Cap.
6
Clamp the upper receiver on a vise with an
AR15 upper receiver vise block. Loosen the
barrel nut by turning it counterclockwise with
an AR15 barrel nut wrench. Take out the
original barrel nut with the delta ring assembly.
7
Release the 4 locking screws by turning them
counterclockwise with the included Allen
wrench, and take out the free floating barrel
nut from the handguard assembly.
8
Fit the free floating barrel nut on the upper
receiver, and tighten it with enough tension.
Make sure that one of the through holes on
the barrel nut is aligned well with the hole on
the upper receiver for the gas tube to pass.
11
12
9
Fit the free floating handguard mount onto the
barrel nut, and make sure that the top rail of
the mount is aligned well with the flat top and
that the two alignment pins go into the through
holes on the barrel nut. Tighten the 4 locking
screws into the handguard assembly with
about 35 inch-lb torque.
11
10
Put back the Front Sight with the Gas Tube.
Put back the two pins to lock the Front Sight
to the barrel.
Install the Flash Hider on the Barrel.
12
Put back the bolt assembly, the lower receiver
and the stock assembly.
13
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PRODUCT FEATURES
Anti-rotation Tabs with Mid-length Screws
(MTU004, MTU005, MTU005E, MTU006, MTU008)
QD Swivel Housing
(MTU004, MTU005, MTU005E, MTU006, MTU008)
Piston System
13
(Optional Step) - Install the Rubber Rail Guards
if desired. Simply extend the Rubber Rail Guard
to horizontally cover the rail. Press the whole
piece to clip onto the rail along 2 sides for a
tight fit.
Low Profile
Gas Block
14
(Optional Step) - Install high quality UTG
accessories on the free floating quad rails,
such as foregrip, bipod, flashlight, laser, dot
sight, etc. Your rifle is ready for test firing now.
Compatible with Piston System
(MTU005, MTU008)
Compatible with Low Profile Gas Block
(MTU004, MTU006)
14
UTG
MODEL 4/15
QUAD RAILS
MTU004 / MTU005 / MTU005E / MTU006 / MTU008
MUM021011104
Made in USA Free Float AR Quad Rail Systems
Slim Profile and Super Lightweight Design
Solid Aircraft Aluminum Construction with Hard Anodizing
Top Rail Extends to Upper Receiver
Most Innovative Design and Satisfying Performance