The PRS GEN3 is a field precision stock for AR15/M16 and AR10/SR25 platforms, featuring tool-less length of pull and cheek piece height adjustment.

With solid adjustments for length of pull and cheek piece height via aluminum detent knobs, the PRS GEN3 (Precision Rifle/Sniper) stock provides a stable interface and is intended for semi-automatic sniper or varmint type rifles. Offering a nearly universal fit, it is optimized for rifle-length receiver extensions but will also mount to many mil-spec carbine and A5-length tubes*. Includes a cant/height-adjustable rubber butt-pad and rotation-limiting QD sling swivel cups as well as M-LOK slots on the bottom for rear monopod mounting.

 

Made in U.S.A.

FEATURES

 

- Mounts to rifle-length receiver extension tube without A2 spacer but will also accommodate mil-spec sized M4 Carbine and many A5-length tubes with standard Castle Nuts and End Plates (not included)*

- Enhanced strength butt-plate withstands severe impact and recoil up to .50 BMG

- Rubber butt-pad provides positive shoulder purchase to prevent slippage and is adjustable for both cant and height

- Machined aluminum LOP and Cheek Piece adjustment knobs with positive locking click detents

- Steel adjustment shafts finished with Melonite® for wear and corrosion resistance

- All aluminum components finished with MIL-A-8625F, Type III, Class 2 hard anodizing

- Bottom M-LOK slots provide additional sling mounting possibilities or for attaching 1913 Picatinny rails for use with a monopod

- Sling Mounts: 

Front/Rear - rotation-limited QD sling swivel mounts (swivels not included)

Rear - 1.25" aluminum sling loop (left-right reversible)

*NOTE: Due to the wide variety of designs and dimensions of carbine receiver extensions as well as the associated mounting hardware, proper fit cannot be guaranteed.  Mounting to a rifle-length receiver extension is recommended to ensure optimal fit and function.

SPECIFICATIONS

Weight: 27.8 oz.

Weight, w/rifle receiver extension: 31.2 oz.

Weight, w/carbine receiver extension:  31.7 oz.

Length, max: 11.5-12.9 in.

LOP Adjustment Range: 1.4 in.

LOP, M16 Collapsed: ~14.3 in.

LOP, M16 Extended: ~15.7 in.

Cheek Height Adjustment Range: 0.8 in.

* Specifications based on factory configuration.

PRS Gen3 Stock Installation Instructions

Carbine Receiver Extension

Step 1:   A. Remove front QD screw, plug, and QD sling mount using a 1/8” hex wrench.

                B. Loosen front body screw ½ turn using a 1/8” hex wrench.

Step 2: Slide stock body over receiver extension until it is flush with the receiver end plate and castle nut.

(Designed for use with Mil-Spec sized AR15/M4 carbine receiver extensions and Mil-Spec end plates)

Step 3: Install front QD screw, plug, and QD sling mount. Torque front QD screw to 40in-lb and front body screw until hand tight using 1/8” hex wrench.

Note: QD sling is reversible, can be installed on either left or right side.

Step 4: Verify Install

Perform final inspection including function test per US Army TM 9-1005-319-23&P to verify correct installation. If you experience any issues during installation, please contact www.magpul.com. Always test fire your weapon before using in an operational environment.

 

                Rifle Receiver Extension

Step 1:   A. Remove front QD screw, plug, and QD sling mount using a 1/8” hex wrench. Slide carbine adapter cap forward to remove.

                B. Loosen front body screw ½ turn using a 1/8” hex wrench.

Step 2:  Slide rifle adapter cap onto stock body with tabs aligned.

Step 3:  Slide stock body over receiver extension until it is flush with the receiver, ensuring index tab and takedown detent spring are fully seated.

Step 4: Extend butt-plate to allow enough clearance for vented mounted screw. Loosen and lower butt-pad per butt-pad height/cant adjustment instructions to allow access for flat head screwdriver. Insert vented mounting screw and hand tighten util fully seated.

Step 5: Install front QD screw, plug, and QD sling mount. Torque front QD screw to 20in-lb and front body screw until hand tight using 1/8” hex wrench.

Note: QD sling mount is reversible, can be installed on either left or right side.

Step 6: Verify Install

Perform final inspection including function test per US Army TM 9-1005-319-23&P to verify correct installation. If you experience any issues during installation, please contact www.magpul.com. Always test fire your weapon before using in an operational environment.

                Adjustments

Length of Pull

Using the vertical adjustment knob on the rear of the stock, turn the wheel to adjust the stock to the desired LOP. Each click equals approximately 1/32” of length. Butt-plate adjusts to a max of 1-3/8”.

WARNING: DO NOT ADJUST PAST MAX LOP OR DAMAGE TO ADJUSTMENT KNOB MAY RESULT.

Comb Height

Using the horizontal adjustment knob in the middle of the stock body, turn the wheel to adjust the stock to the desired comb height. Each click equals approximately 1/32” of length. Cheek riser adjusts to a max of ¾” above the stock body.

WARNING: DO NOT ADJUST PAST MAX COMB HEIGHT OR DAMAGE TO RECEIVER EXTENSION MAY RESULT.

Butt-Pad Height/Cant Adjustment

The PRS butt-pad can be raised or lowered ¾” from center and canted 5 degrees to the left or right. Loosen the two butt-pad retaining screws 1 turn, adjust to desired position, and hand tighten using a 1/8” hex wrench.

Reversible QD Footman’s Loop

The PRS Gen3 QD footman’s loop is reversible. Remove the two rear stock body screws opposite the footman’s loop using a 1/8” hex wrench. Reinstall in desired location and tighten screws to 20in-lb.

Note: Over tightening the two rear stock body screws may impede proper function of LOP adjustment knob.