Magpul PRS GEN3 Precision-Adjustable Stock - Black

Manufactured by Magpul Industries
Manufactured by Magpul Industries
9 Reviews

In Stock

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The Magpul PRS Gen 3 Precision Rifle/Sniper stock is a field precision stock for AR-15/M16 and AR-10/SR-25 platforms. Featuring tool-less length of pull and cheek piece height adjustments via aluminum detent knobs, the PRS Gen 3 stock provides a stable interface intended for semi-automatic sniper or varmint rifles. Optimized for rifle length receiver extensions, this precision rifle stock is also compatible with many Mil-Spec carbine and A5 length tubes. Includes a cant/height-adjustable rubber buttpad, rotation-limiting QD sling swivel cups, and M-LOK slots on the bottom for monopod mounting.
NOTE: A rifle length receiver extension is recommended to ensure optimal fit and function. Due to the wide range in design and dimensions available for carbine receiver extensions, a proper fit cannot be guaranteed.

  • Optimized for rifle length receiver extensions
  • MIL-SPEC carbine and A5 length receiver extension compatible
  • Enhanced strength buttplate withstands recoil up to .50 BMG
  • Rubber buttpad adjustable for cant and height
  • Aluminum adjustment knobs with positive locking click detents
  • Melonite finished steel adjustment shafts
  • Bottom M-LOK slots
  • Rotation-limited QD sling swivel mounts
  • 1.25" aluminum sling loop
  • Length: 11.5-12.9”
  • Cheek height adjustment range: 0.8”
  • Length of pull adjustment range: 1.4”
  • Length of pull - Collapsed: ~14.3”
  • Length of pull - Extended: ~15.7”
  • Weight: 27.8 oz

Magpul continues to grow and develop based on innovation, simplicity, and efficiency. At Magpul, mission driven requirements inform their product design, materials, and manufacturing, focusing on efficiency without sacrificing quality or performance.
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Sling MountMultiple - See Description
StorageNot Storage Capable
TypeFixed - Adjustable
Weight27.8 Oz
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to

Ratings & Reviews

9 reviews

  • 4 stars
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Does not fit Larue


Does not fit Larue OBR 7.62 "carbine" buffer. Requires a $60 buffer tube setup putting the total cost over $300. Measure before you buy

Buy it


Hands down the best option for your at 10 precision rifle

Great Product, outstanding customer service


well worth the price. this thing is solid. primary arms is incredible with shipping and customer service, I didn't receive an order confirmation and when I emailed PA four days later to inquire, the rep responded promptly only to notify me that my order had already been delivered. I am more than happy with the product and especially Primary Arms. I will exclusively be ordering from them going forward

Magpul PRS Gen3

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Great upgrade from previous generation. Installed on AR10 platform with no issues. Cant and height adjustment on butt-pad along with LOP and check riser adjustments ensure perfect fit and check weld for every shooter. And as always service from Primary Arms is exceptional.

Bit heavy but a nice precision shooter stock


Nice quality stock. Fits on my 308 platform nicely but the cheek comb does limit travel of the charging handle. I suspect this is not an issue on the smaller platforms. I used a rifle buffer so I cannot comment on fitment with a carbine buffer. Fit and finish is excellent.

This stock is heavy. I was originally thinking I would use it for precision and hunting purposes. The added weight doesn't really make it feasible for field purposes like hunting so I will keep it mated to my bench gun. The added weight also changes the balance of the gun. I would not recommend this for shorter barrel rifles.

Great for “lanky” arms

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Finished installing on a 16” DPMS GII AP4. The factory carbine buffer fit extremely tight, and modifications were done so the QD pin would fit and hold at the front of the buffer. For my shorter barrel application it adds weight to the rear and for me makes offhand shooting more enjoyable. Overall excellent product and perfect overall length of pull for my 7’ wingspan! In the future I’ll be adding a 24” bull barrel and switching to a rifle length buffer kit making it either a great bench rifle or SASS for hunting (longer barrel in a shotgun sling). Magpul states performance is better/best with a rifle length buffer so I’ll do some comparisons.

Not for short arms


Comparing this with the LMT DMR STOCK it’s close in build and performance. I’m 5 foot 10 inches and the length of the magpul stock is very long . I certainly have no use for the length of pull adjustment.i bought the LMT on sale for a good price but no longer can find it on sale . So I went with the magpul . So the savings on the magpul kinda evens things out .i mostly use mine for benchrest anyways so all works for me.

PRS Gen3


I really like this stock a lot. A bit on the heavy side, but this thing looks tough and sturdy to handle bumps and maybe drops here and there. No comparison to the light collapsible stocks as a lot of them has a little wobble. This PRS Gen3 is tight, no wobble whatsoever. With adjustable cheek weld and thick rubber butt pad, there’s none better. I’m ready to order another one for my second AR15 build.

Great Adjustable Stock

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This is my second PRS GEN3 and I love it. Adjustment is easy when changing positions that may require a little fine tuning to get that perfect field of view. I would recommend this to anyone using an AR platform for precision.