Tools & Parts Checklist DPMS LR-308 Free Float Install

Posted by Monstrum on Jan 31st 2019

Tools & Parts Checklist DPMS LR-308 Free Float Install

This Checklist is a guide to the required and optional tools needed to install your handguard correctly. When you've reviewed this information head over to our LR-308 Free Float Handguard Complete Install Guide for more help.

Required Tools and Parts:

VISE
For clamping the upper receiver assembly. Recommend 5” vise as a minimum.

UPPER RECEIVER VISE BLOCK (LR-308)
To hold the upper receiver securely. Usually a two-piece plastic clamshell design.

SAFETY GLASSES
For eye protection. Look for Z87 rating as a minimum.

BALL PEEN HAMMER
Used with punches. Four to eight ounces recommended.

#2 (5/64”) ROLL PIN HOLDER
To start gas block roll pin. Makes starting roll pins MUCH easier.

#2 ROLL PIN PUNCH
To drive gas block roll pin in and out.

CUP TIP PUNCH
For driving out taper pins without damage.

ARMORER’S BENCH BLOCK
Steadies barrel assembly and gas block when driving roll pins. Also used for assembly of upper receiver and charging handle assembly.

ARMORER’S WRENCH (LR-308)
For removal/installation of barrel nut and flash hider (also used on stock and buffer tube). View the Armorer's Wrench here.

½” TORQUE WRENCH
For proper tightening of barrel nut. Can also use 3/8” torque wrench with a ½” adapter. Use a torque wrench with a range between 30-80 ft-lb.

STRAP WRENCH
To tighten and loosen free-float handguards. Use a rubber type to prevent scratching the handguard.

LEVEL
To inspect relative alignment of handguard rail and upper receiver rail. A small handheld level or one attached to a machinist’s square works great.

LOW PROFILE GAS BLOCK
Replaces front sight gas block and fits under free-float handguards. Purchase a Gas Block here.

GAS TUBE ROLL PIN (5/64”)
Retains the gas tube inside the gas block.

CRUSH WASHER
For barrels with flash hiders or other muzzle devices.

LITHIUM MOLY GREASE
High-pressure grease applied to the barrel nut in order to prevent galling of the upper receiver and barrel nut threads.

MEDIUM STRENGTH THREADLOCKER
Used to prevent loosening of lock ring, handguard and other metal hardware.

Optional Tools:

HANDGUARD REMOVAL TOOL
Used to compress the delta ring spring when installing or removing two-piece handguards.

SOFT-FACED MALLET
A plastic dead-blow type works well for loosening stubborn front sight gas blocks.

HEX KEY
Also called an allen wrench. Used for removing & installing clamp-on type gas blocks.

Related Articles:

What is the difference between the AR-10 and the LR-308 Rifles?

LR-308 Free Float Handguard Complete Install Guide.

Collection of Monstrum Tactical LR-308 Handguards and Tools