Posted on the general discussion board and didn't get anywhere. Hope you guys can help.
Just bought a Lo Pro and want to mount a picatinny rail on the underside. Will use the mount for a sling swivel and possibly a tac lite. Since the glacier guard is internally different than the typical milspec guard; what mods if any will I need to make to the guard in order to use a add on rail? Also; any mfgs that make a compatible rail or have a system that is more easily adaptable to the glacier guard?
I've look at a number of them so far but almost all state they are only compatible with the milspec guards. I would also prefer to stay awat from the plastic rails if possible.
Here are a few pics of my rifle. Add ons and mods to date are:
YHM front and rear flip up BUIS
YHM 6 in cantilevered 1/2' riser
pardus 6 position collapsible stock
Burris 1.5x Scout scope
Will also be adding a laser sight; Specgear sling and YHM 45 degree dovetails for my sights and tac lite. And of coarse; sling attachments.
http://img.photobucket.com/albums/v87/caneyforkoutfitters/LPAR15-3.jpg
http://img.photobucket.com/albums/v87/caneyforkoutfitters/LPAR15-6.jpg
http://img.photobucket.com/albums/v87/caneyforkoutfitters/LPAR15-2.jpg
http://img.photobucket.com/albums/v87/caneyforkoutfitters/LPar15-1.jpg
thanks in advance for any advice
Force

Free Float Quad Rail Installation
Installing Free Float Quad Rail On Dpms Oracle 2
Installing Free Float Quad Rail On Dpms Oracle System
Installing Free Float Quad Rail On Dpms Oracle 2

Why install a free float handguard?

One of the main benefits to free-floating an AR-15 is an increase in accuracy from reduced variability in the barrel harmonics due to sling tension. The traditional AR-15 configuration has the sling mount attachment at the base of the front sight gas block, so moderate changes in sling tension can change the point of impact downrange. A direct impingement AR-15 can never be truly “free-floated” due to the attachment of the gas block and gas tube, but the addition of a quad rail or other free float style handguard can help with accuracy and also provides a stable and convenient platform for attaching bipods, lights, grips and other accessories. https://peyellow.amebaownd.com/posts/19467540.

Why install a free float handguard? One of the main benefits to free-floating an AR-15 is an increase in accuracy from reduced variability in the barrel harmonics due to sling tension. The traditional AR-15 configuration has the sling mount attachment at the base of the front sight gas block, so moderate changes in sling tension can change the point of impact downrange. A direct impingement AR. Midwest Industries Quad-rail Drop In For Dpms Oracle Lr-308 will enhance your shooting experience with its tight fit and ability to provide a solid grip. These Gun Grips, from the professionals at Midwest Industries, are made from high quality materials that will supply long-lasting durability. The free float tubes are vented and hard coat anodized per mil spec and are matte black in color. Overall width dimension is 2.1' only slightly wider than the AR free float tubes, and includes a manganese phosphated steel locking collar to control the timing of the rails. This item is designed to fit all DPMS standard length 308 models with a. The DPMS free floating quad rail features 4 picatinny rails for mounting accessories. This handguard is constructed of aircraft aluminum with a mil-spec hard coat anodized finish. This handguard is designed to match the Low-Profile LR-308 receivers, which are generally the A3-style uppers.

What do I need to install a free float quad rail handguard?

When planning your free-float project, take a close look at the type of gas system currently on your rifle. Most standard front sight gas blocks are held onto the barrel by either tapered pins or by clamps. Make sure you have all the right tools and parts on hand for disassembly and reassembly before starting work.

Step-by-Step Installation

As always, before working on any firearm make sure it’s unloaded and safe to handle.

1. First, remove the original handguards using a handguard removal tool.

2. Separate the upper and lower receivers and remove the bolt carrier group and charging handle.

3. Clamp the upper receiver into a vise using a vise block and remove the flash hider and crush washer. The crush washer will not be reused.

4. Tap out the gas tube roll pin with a #2 roll pin punch and inspect the front sight gas block. If it has tapered pins, drive them out with a cup tip punch from the small side. If unsure, measure the pin diameter on each side first. If the pins are difficult to remove, apply penetrating oil, let sit overnight and try again. Sometimes applying light heat to the area also helps with removal.

5. If the gas block is a clamp-on type, use a hex key to loosen the set screws. Remove the original front sight gas block assembly from the barrel. If it sticks, gently tap on it with a soft-faced hammer until it slides off the barrel. Remove the handguard retainer and gas tube.

6. On a bench block, align the gas tube through-hole (with the large hole facing down) into the new gas block and use a roll pin holder to start the roll pin. Drive the roll pin flush with the gas block.

7. Remove the original barrel nut/delta ring assembly with the armorer’s wrench, then clean and inspect the upper receiver threads.

8. Remove the anti-rotation screw from the bottom of the new handguards and unscrew the new barrel nut, removing it from the handguards. Apply a thin layer of high quality lithium moly grease to the inside threads of the barrel nut, install it over the barrel so that the lock ring faces toward the upper receiver, then hand-tighten the barrel nut.

9. Set your torque wrench to 30 ft/lbs and tighten the barrel nut using your armorer’s wrench. Remove the torque wrench and loosen the barrel nut with the armorer’s wrench (never loosen with a torque wrench).

10. Re-torque to 30 ft/lbs, then remove the torque wrench and loosen again. Torque to 30 ft/lbs one more time and inspect the alignment between the barrel nut hole and the gas tube hole in the upper receiver. This three-time torque sequence allows the threads on the upper receiver and barrel nut to mate more completely.

DAZ = Activated by DAZ Loader v2.2.2.0. STD = Standard installation. Windows 7 Ultimate – – – – – – – STD / DAZ / OEM. https://peyellow.amebaownd.com/posts/19210209.

11. Without exceeding 60 ft/lbs, tighten the barrel nut until the gas tube hole in the upper receiver and the hole in the barrel nut align perfectly. The holes should line up at about 35 foot-pounds of torque, and the gas tube should be centered in the barrel nut hole without touching the edges. Do not partially loosen the barrel nut to achieve alignment – if need be, loosen the nut completely and re-tighten to align correctly.

12. Apply blue threadlocker onto the gas block set screws and slide the gas block assembly onto the barrel, making sure the gas port in the barrel aligns with the hole in the gas block. Tighten the set screws on the gas block securely.

Free Float Quad Rail Installation

13. Next, loosen the lock ring and carefully thread the quad rail onto the barrel nut for a couple turns. Apply blue threadlocker onto the outside barrel nut threads and screw on the quad rail.

Installing Free Float Quad Rail On Dpms Oracle 2

14. Adjust the lock ring and handguard until the top rail (marked “T”) is almost aligned with the rail on the upper receiver. Use a strap wrench and carefully tighten the handguard until snug. Be careful not to over-tighten; if too much torque is applied, it can misalign the barrel nut and gas tube underneath.

15. You can check for proper gas tube installation using the bolt carrier at this time: insert the bolt carrier group (without the charging handle) into the upper receiver and slowly slide it forward, checking to make sure the carrier gas key doesn’t bind on the gas tube.

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