Leapers Inc. has been supplying the shooting hunting and outdoors community with quality gear for over 20 years. They have risen to become a leading manufacturer of stocks, products and accessories for a wide variety of firearms. The Leapers UTG brand has become synonymous with unique and innovative hunting and shooting accessories at an affordable price point. Leapers/UTG is dedicated to being an industry leader in high quality firearms accessories at a price you can afford!
This is a UTG PRO AR-15 Ops Ready S4 Mil-spec Stock Kit molded from impact resistant high strength matte black polymer. It is complete with Mil-spec extension tube, buffer, buffer spring, receiver end plate, and castle nut. Its unique 4.28" length with 4 position adjustability provides comfortable length of pull and ease of shouldering firearm when wearing a load bearing vest or plate carrier system. It is built for heavy duty use with the tightest tolerance controls to provide the most secure fit and function
Features and Specifications:
Manufacturer Number: RBUS4BMS
Minimal Bulk Profile
Lightweight
Beyond Sub Compact Size, Ideal for SBRs
Includes Ergonomic Slanted Cheek Rest and Rubberized Butt Pad and Features a Reversible Sling Swivel Housing for Left or Right Handed Shooters and a Standard Sling Loop for Traditional Slings
Removable 5.51" Extended Cheek Rest Insert Included
Complete with Mil-spec Extension Tube, Buffer, Buffer Spring, Receiver End Plate, and Castle Nut
Material: Polymer
Height: 4.75"
Length : 4.28"
Weight: 7.2 oz
Color: Black
Unconditional Lifetime Warranty
This is a UTG PRO AR-15 Ops Ready S4 Mil-spec Stock Kit molded from impact resistant high strength matte black polymer. It is complete with Mil-spec extension tube, buffer, buffer spring, receiver end plate, and castle nut. Its unique 4.28" length with 4 position adjustability provides comfortable length of pull and ease of shouldering firearm when wearing a load bearing vest or plate carrier system. It is built for heavy duty use with the tightest tolerance controls to provide the most secure fit and function
Features and Specifications:
Manufacturer Number: RBUS4BMS
Minimal Bulk Profile
Lightweight
Beyond Sub Compact Size, Ideal for SBRs
Includes Ergonomic Slanted Cheek Rest and Rubberized Butt Pad and Features a Reversible Sling Swivel Housing for Left or Right Handed Shooters and a Standard Sling Loop for Traditional Slings
Removable 5.51" Extended Cheek Rest Insert Included
Complete with Mil-spec Extension Tube, Buffer, Buffer Spring, Receiver End Plate, and Castle Nut
Material: Polymer
Height: 4.75"
Length : 4.28"
Weight: 7.2 oz
Color: Black
Unconditional Lifetime Warranty
19 Ratings
Nice, but not very comfortable
November 17, 2023
It's a quality component
Good sturdy butt stock, perfect option for your needs. The quality is great
August 12, 2023
Good price and quality
It works well and feels like very good quality and I Love the look of the butt stock on my rifle but my opinion only is..The extension on the buffer tube is one extension slot away from perfect the cheek rest helps a lot! The slot latch on the butt stock is at the backend for a shorter retractable extension on the butt stock thats different.
March 24, 2023
Worth it.
Sturdy construction, looks cool, and it works pretty good. Adjustable cheek rest is just ok. Not a whole lot of "adjusting" but it works for me.
November 18, 2022
Really nice solid stock
Really nice stock. Solid build looks great
September 25, 2022
It was everything I wanted. The only issue is when you go to adjust the length. The button likes release trigger sticks. Other than that it is awesome and looks great
May 22, 2022
Nice stock. Exactly as described.
January 4, 2022
Nice Stock Upgrade. Easy to Install.
Very nice replacement for my old A2 stock. I like the rubber butt plate, like the sole of a boot. The integrated QD mount was a nice touch, got me to explore those things and I like them.The old stock was easy to remove with just a flat blade screwdriver. The new stock was easy to install but you must have a castle nut wrench. I bought one from this site and it worked great.
November 23, 2021
I'm happy with this stock.
Seems solid, very little shake or wobble, installed on a stripped lower build in 5.56.
October 18, 2021
Great product
High quality and great value
October 7, 2021
Excellent kit - great instructions and quality seems to be good. Perfect assembly and operation. I'm a newbie so didn't know I needed longer extension. This one starts short and 4 steps aren't enough. I'm 6'1" so will order a longer reach.
September 21, 2021
Very loose don't like it.
September 19, 2021
Great purchase
Really comfortable! Have not shot with it yet, but it sits well when brought up to a shooting position. I like how it’s a bit more narrow than the standard stocks, makes it much more comfortable, works well with armor too.
August 30, 2021
Great mobility, great construction.
Put it on my wife's AR. Works great, sits right in the pocket of her shoulder, she couldn't be happier. Easy install, slipped it on the factory buffer tube but it DOES include a buffer tube, spring, and buffer. Pros: Attractive
October 18, 2020
Great product
Sturdy . comfortable
June 17, 2020
Good product at a good price.
Comfortable fit. Right size.
April 12, 2020
Great buy
I put this on a bushmaster and I love it and would highly recommend it !!! Pros: Solid and sturdy
February 1, 2020
Excellent
This is a great stock kit. Fits good. Not sloppy. Comfortable.
January 10, 2020
I would buy this product again.
Well crafted, strong and solid. Buffer and spring works smoothly with perfect cycling on a .223 caliber. Spent brass falls into a 4 o'clock position and within a 16" square area. Stock collapses smoothly and quick release button holds firmly. Definitely worth the money spent. Pros: Very well crafted! Strong and solid!
February 9, 2019
I have an a American tactical AR-15 pistol. In order to replace the stabilizer brace with a shoulder stock, do I have to change the buffer tube? Or, is there a shoulder stock that fits the larger tube that's on it?
Answer:
If you have a pistol buffer tube you would need a new tube.
Is this stock pinned?
Answer:
No it is not.
Will this work with a 7.62x39?
Answer:
If you have an AR-15 chambered in 7.62x39, then this is compatible. However, many shooters prefer to use a heavier weight buffer when shooting 7.62x39 and you may prefer an H3 Buffer. Check out item # 16-RB-T6BFH3.
Can the buffer tube be remove?
Answer:
Yes the stock can be separated from the buffer tube.
Were is it made?
Answer:
Michigan
Will this fit on a Ruger 8502?
Answer:
Yes it will.
Compared with the Maxim Defense CCS, which one is shorter? (Assuming both are not retracted)
Answer:
The Maxim Defense CCS is shorter.
When isn't extended, what's the length from castle nut to butt pad?
Answer:
This item is 7.58" when collapsed.
Will this fit a 10/22 charger with adapter? If so does that make the charger illegal without the tax stamp you referred to in other questions?
Answer:
Adding a stock to the 10/22 Charger pistol without the ATF approval and a tax stamp would create a regulated SBR (short barreled rifle) in federal violation of the NFA. You may want to consider adding a pistol brace instead.
what is the length of pull adjustability?
Answer:
The length of pull will be adjustable from 11" to 14" so your "adjustability" is going to be about 4" or so.
Can this stock fit a jts m12 ak?
Answer:
No it will not
What is the weight of the buffer?
Answer:
3.0 oz
does this come with a retaining pin and spring?
Answer:
No the detent and spring are not included. Those are usually included with a lower parts kit.
can it extend like a custom stock on a ar-15?
Answer:
Yes it is collapsible.
What is the difference between STK-276-015 and STK-276-014? I have an S&W M&P Sport II. Thanks for the info.
Answer:
STK-276-014 comes with the buffer tube assemly, STK-276-015 does not.
what buffer tube wrench do you recommend?
Answer:
One of our highest reviewed wrenches would be the DoubleStar AR-15 Carbine Buffer Tube Castle Nut Wrench, item # ARR-044-065
Have a springfield armory saint 5.56x45, will this fit on there and do I need to buy anything else for it to fit?
Answer:
Yes that stock will fit the Saint. You will need a buffer tube wrench, a vise block and a bench vise.
I have a Rugger 556 with a thordsen stock. Dose this kit have everything needed to replace a thordsen stock or will I need to separately also purchase a replacement buffer tube?
Answer:
All parts required for installation are included.
will this fit on sig sauer m400 tread
Answer:
Yes it will.
Is it compatible with a ar15 pistol. Trying to keep it pistol length
Answer:
The threading will fit together. However, your pistol is considered a short barrel rifle if you add a stock and the pistol may not have enough velocity to cycle the bolt. Sticking with a pistol buffer system will avoid these issues, check out item # BRACE-879-047
Would this fit a dpms a-15?
Answer:
Yes
Is this compatible with a qd swivel? Thanks
Answer:
Yes
Will this stock work on my DPMS and on my Bushmaster?
Answer:
Yes
Will this install on a VR80/FEAR125 shotgun?
Answer:
No it will not.
Will this easily fit a S&W M&P Sport II carbine AR-15?
Answer:
Yes, but you should just buy item STK-276-015
If one would happen to own a freedom ordinance fx-9. Would this stock fit on said fire arm...asking for a friend.
Answer:
Yes
Have a ruger 556 will it fit
Answer:
Yes
I have a 7.5 inch HBAR 300 ACC blackout will this work on this upper
Answer:
Yes and no. This will work with that upper, but this is a stock, so it goes on a lower.
What is min min/max lop of this stock?
Answer:
11" to 14"
Will this stock work on a Ruger 8510 AR556 Hera Stock? I live in Alabama so I don't need it California compliant.
Answer:
Yes it will
Will this tube fit on my Palmetto state armory ar pistol, and will the plate fit as well onto the lower?
Answer:
While this will physically fit your pistol, installing it without the $200 tax stamp on a pistol would be a federal felony
will this fit a ruger 556 lower?
Answer:
Yes it will.
Will this fit a DPMS Oracle?
Answer:
Yes it will.
Can this fit a HK 416 pistol with the brace adapter?
Answer:
Yes it will
What is the buffer weight
Answer:
3.0 ounces.
Is the extention tube and the stock it self one piece? Can the tube and the stock be separated into two pieces or is together? Just bought at new stock and there is a significant amount of play when I atatch the new stock to the stock tube. If this was one piece it would remedy the proplem
Answer:
The tube and stock can be separated.
Is the buffer/extention tube made of aluminum?
Answer:
Yes the buffer tube is made of aluminum.