SIG Sauer 516/716 Handguard Replacement

© 2014 Lancer Systems all rights reserved
Page 1
PROPRIETARY NOTICE: This contains Lancer Systems’ confidential, proprietary and/or
competition sensitive data.
ITAR NOTICE: “Warning – This document contains technical
data whose export is restricted by the Arms Export Control Act
(Title 22, U.S.C. Sec. 2751, et. Seq.) or the Export
Administration Act of 1979 as amended, Title 50 U.S.C. App.
2401 et, seq. Violations of these export laws are subject to
severe criminal penalties. Disseminate in Accordance with
provisions of DOD Directive 5230.25.”
Lancer Systems is AS9100C:2009 ISO9001:2008 CERTIFIED
Page 2
Table of Contents
Safety Rules ……………………………………………………………………..
Carbon Fiber Handguard
……...………………………………………….
Description
.………………………………………………………….
Features and Options ………………………………………………….
Tool Box
……………………………………………………………
Clearing the Rifle
………………………………………………….
Removal of original handguard ………………………………………..
Installation of Lancer handguard ………………………………………..
Page 3
4
5
5
5
6
6- 7
8
9 - 13
Safety Rules
Cardinal Rules of Firearms Safety
1. Treat every firearm as if it were loaded until positively ascertained
otherwise by you
2. Never point a firearm at anything or anybody that you do not intend to
shoot, or in a direction where an unintentional discharge may do harm
3. Never place your finger into the trigger guard until ready and justified to
fire
4. Be sure of your threat, backstop and beyond
Rendering a Firearm Safe
1.
2.
3.
4.
5.
Always point a firearm in the safest direction (MUZZLE AWARENESS)
Safety ON (if applicable)
Magazine removed (or cylinder open, unload cylinder)
Bolt, slide or cocking lever locked to the rear
Visually and physically inspect the chamber
NOTE: Wear eye protection during disassembly and reassembly of your firearm.
Page 4
Sig Sauer 516/716 Handguard Replacement
Description:
CARBON FIBER HANDGUARDS Piston Rifle
Designed to fit popular rifles with piston operating systems, the Lancer Piston Rifle
carbon−fiber handguards will replace the OEM handguard and offer a substantial weight
savings without sacrificing performance.
FEATURES & OPTIONS
•
•
•
•
•
•
•
Free Float Design
Available in multiple lengths
Octagon Carbon-Fiber Tube
Aluminum Receiver Extension
with built in Picatinny rail
Clearance to access gas block
Dimensions:
o Outside Diameter – 2”
o Inside Diameter – 1.7”
SIG 516/716 extended
handguards have a cut-out exposing the gas block top rail and access to gas adjustment. The
Picatinny rail does not extend beyond the gas block
PART NUMBER
LCH516-C
LCH516-CX
LCH716-C
LCH716-CX
DESCRIPTION
LENGTH WEIGHT
Handguard for sig 516, carbine length with top rail
7.25 " 7.9 oz
Handguard for sig 516, extended length with top rail 13.1 " 9.8 oz
Handguard for sig 716, carbine length with top rail
7.4 "
8.3 oz
Handguard for sig 716, extended length with top rail 13.1 " 10.3 oz
Page 5
Tool Box:
5/32, 3/32, 5/64, 1/8, inch hex keys
Left, right, front and back is established by placing the firearm or
part/component in the shooting oriented position.
Clearing the rifle
Before disassembling, ensure the rifle and magazine are completely unloaded and free of
ammunition, as follows:
With the rifle pointed in the safest direction
1. Move the safety selector to the “safe” position.
Page 6
2. Remove the magazine
3. Pull the charging handle to the rear and
depress the bolt lock to hold the bolt
carrier assembly open.
4. Visually and physically
check that the chamber is
clear of any ammunition.
5. Keeping fingers clear of the
ejection port, depress the
bolt lock and close the bolt
carrier assembly. (DO NOT
press the trigger)
Page 7
Removal of the original handguard. Note: Rifle may remain complete during this
procedure. There is no need to field strip the rifle.
1. Using a 3/32 hex key, remove the front side screws from the underside of the handguard.
2. Repeat for the rear handguard screws.
3. Remove the handguard, now in two
pieces, from the rifle.
Disassembly is complete.
Page 8
Installation of the Lancer Handguard
Lancer handguard pieces:
1. Place the top Picatinny rail component onto the rifle, ensuring the tab is aligned in the
receiver.
2. Turn the rifle over and place the locking piece on the bottom of the barrel with the lug
seated in the recess.
Page 9
3. Hold the bottom collar in place.
4. Insert four screws securing the collar to the Picatinny rail component.
5. Using a 5/32 hex key, tighten the four
screws.
Page 10
6. Place the bushing on top of the bottom
collar aligning the holes. The flat edge of
the bushing faces the receiver.
7. Ensure the bushing, bottom collar and locking piece holes are all aligned. Insert screws
into the assembly and tighten the two screws with a 1/8
inch hex key.
8. Orient the carbon fiber handguard with the large, long opening to the top.
Front
Page 11
9. Slide the handguard over the barrel, continuing back towards the receiver.
10. Engage the upper rear edge of the
handguard into the slots of
Picatinny rail component on both
sides.
11. Continue the handguard to the rear, ensuring the side cutouts of the handguard startle
the lugs of the collar and Picatinny rail assembly.
12. Continue the handguard back to the receiver.
Page 12
13. Using a 3/32 inch hex key, insert and tighten the four bottom handguard screws.
14. Using a 5/64 inch hex key, insert and tighten the side screws (2) one each side.
Handguard installation is complete.
Page 13