Thordsen Customs FRS-15 Gen III Stock Kit - Standard - FDE

SKU# 1689 | by Thordsen Customs LLC
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Manufacturer’s Description

FRS-15 stocks are on over 80,000 rifles in America and just like our tens-of-thousands of satisfied customers, we believe it is the best featureless solution on the market.  The FRS-15 was one of the first featureless stocks available and we hold the patent on applying the ergonomics of a rifle-style-grasp to an AR receiver. The FRS-15 replaces both the adjustable stock & pistol grip feature of your black rifle and has evolved, through three generations of improvements and upgrades, into the most versatile, safe, and functional option for featureless application.

The FRS-15 is made in California, by California gun owners. We work hard to protect the rights of legal gun owners and offer them the ability to stay in compliance with the swiftly changing gun laws of their state.

The FRS-15 Gen III, is compatible with the AR-15 and AR-10 platforms, with Carbine or A2 length recoil systems. It is also compatible with the AK-47, as well as the CZ Scorpion, and SIG SAUER MCX/MPX. The modular design offers a range of additional sling options, cheek risers, and length of pull choices to meet both your needs and your budget. 


The vast majority of .308 receivers are extended by 1/2" in the rear to accommodate a larger upper receiver and bolt carrier group. In order for the FRS-15 GEN III Carbine and Rifle kits to fit properly, an additional A2 spacer and .308 receiver adapter are necessary.  Bundle kits are avalable that include everything you need for attaching a FRS-15 Gen III stock to your DPMS, Black Rain Ordnance, or Windam Weaponry .308.




Standard or Enhanced options refer to features on the Buffer Tube Cover that comes with your kit and are just like those offered on all models of the FRS-15 Stock. Our FRS-15 kits are not only designed to be the most ergonomic solution for featureless conversions, they are also tailored to meet our customers individual needs and budgets. Many people use their rifles in different ways and our Standard and Enhanced kits allow for maximum utility. The difference in the two kits is the Buffer Tube Cover. The Standard FRS-15 kits are tailored more for those who primarily shoot from a bench or prefer a two point sling. The Enhanced FRS-15 kits include two additional quick detach sling hard points. The advantage is that if a user prefers a single point sling, the center of gravity is in line with the barrel which keeps the muzzle pointed straight down.




  • Fits any standard carbine length recoil system
  • Fits any brand of forged AR-15 receiver
  • Fits many brands of billet AR-15 receivers
  • Fits many DPMS profile AR-10 variant lowers (with optional adapter)
  • Fits Black Rain Ordinance and Windham Weaponry AR-10 variant lowers (with optional adapter)
  • Fits Smith & Wesson M&P 15/22 (with optional adapter)


  • Bottom or side mount sling loops (Optional)
  • Thickened Grip
  • Interchangeable side panels
  • Aggressively checkered grip
  • Grip storage compartment
  • Rubber buttpad
  • Many upgrades & accessories available


  • Material: 33% Glass filled Nylon
  • Overall length 12.5"
  • Length of pull: 12.00" min- 15.50" max
  • Stock weight: 20.5 oz.
  • Buffer tube cover weight: 3.3 oz.
  • Buffer tube cover length: 7.5"


  • FRS-15 GEN III Rifle Stock
  • Three LOP Spacers
  • Standard Buffer Tube Cover
  • Ergonomic Endplate
  • Mounting Hardware
  • Mounting Wedge
  • Full color installation instructions

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