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Questions & Answers
Is there much rattle when extended?

There should be little to no rattle as long as the stock is installed on the proper size buffer tube.

by Mike B., Verified Owner, November 24, 2020
Does the buffer tube need to come off for installation ? Expert Answer

No. The UTG Pro AR15 Ops Ready S1 Mil-spec Stock will fit over any mil-spec carbine length buffer tube without the need to remove it.

by Ethan, Gear Expert, September 26, 2022
Customer Reviews
Helpful Positive Review
UTG Pro stock by Ed, Verified Owner, November 25, 2017
Sold stock, UTG Pro items are made in the US. Have several LMT sopmods and so far this does the same thing for a fraction of the cost. For the milspec buffer with little play. Do like the adjustment leer as it sits flush with the stock. Highly rec...
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3/3 found this helpful
Helpful Positive Review
Utilitarian by JEDI, May 15, 2020
It's a good stock. Hefty and with compartments for storage, the rubber caps don't come off easy either (which is great!). I would say the only problem is rattle, it isn't as tight a fit on a mil spec buffer tube as I'd hoped. It does have a little wi...
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3/3 found this helpful
Helpful Positive Review
Leapers Stock by jim, August 25, 2020
The stock is awesome. Not awesome for the price (cheap) but actually expected to pay twice as much for the quality. Will absolutely order Leapers products again.I also ordered a Leapers pistol grip and that was awesome as well.
1/2 found this helpful
Helpful Positive Review
Way Better Than Expected by Hack, Verified Owner, October 2, 2020
For the price I did not expect this level of quality. Wow,it's solid. Incredibly made and easy to install. Just as nice as the more expensive options maybe better. An issues from years past have been corrected. Works flawlessly and doesn't impede the...
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3/3 found this helpful
Helpful Positive Review
Very nice stock by MBL, Verified Owner, March 12, 2023
I don’t review a lot of items but this one I thought deserved a review. Lockup fit and finish of this stock is very good. It also has multiple sling attachment options along with its 2 water tight compartments .I own a BCM gunfighter mod 1 sopmod sto...
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1/1 found this helpful
Helpful Positive Review
Legit Mil-Spec by dmitchsr, Verified Owner, October 24, 2023
I've had some other cheap stocks that were not mil-spec and they flopped around and was very loose and made me feel very uncomfortable. You would never know how important the buttstock until you get a bad one...it can be a nightmare. This UTG Pro A...
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1/1 found this helpful
Read All 89 Reviews

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Product Info for UTG Pro AR15 Ops Ready S1 Mil-spec Stock

The UTG Pro Model 4 Dual Storage Stock is proudly designed and built for your hardest missions. These AR15 Stocks by UTG Pro are crafted to provide the most secure fit and silent operation, featuring an integrated ambidextrous sling loop, a rubberized butt pad, and a slanted cheek rest for enhanced shooting stability and control for a right or left handed shooter. The extended 8in length of the UTG Pro Model 4 Ambidextrous Stock allows for superior firearm handling, and is molded from impact resistant, high strength polymer. You're expected to perform at your best, so make sure your rifle works for you, choose the UTG Pro Model 4 Polymer Stock.image

WARNING: California`s Proposition 65

Specifications for UTG Pro AR15 Ops Ready S1 Mil-spec Stock:

Manufacturer: UTG Pro
Gun Model: AR-15
Gun Type: Rifle
Condition: New
Hand: Ambidextrous
Buffer Tube Size: Mil-Spec
Fabric/Material: High-strength Polymer
Country of Origin: USA

Features of UTG Pro Model 4 Dual Storage Stock, LP-BSC-RBUS1BMS:

  • Built for heavy-duty operations with tightest tolerance control providing the most secure fit and silent operation
  • Mil-spec stock molded from impact resistant high-strength polymer in black
  • Built-in rubberized butt pad, chamfered front and rear edges and slanted cheek rest surface further enhances shooting stability and consistent firearm control
  • Dual storage compartments with removable waterproof caps provide dry storage for batteries (up to 8 CR123) and/or other essential accessories
  • Integral ambidextrous sling loop and QD sling swivel housing for left or right handed shooters
  • Extended 8in length for increased length of pull - combine with super slim handguards for superior firearm handling

Package Contents:

  • UTG Pro AR15 Ops Ready S1 Mil-spec Stock

UTG Pro AR15 Ops Ready S1 Mil-spec Stock Orderable Models

List of Orderable Models

  • UTG Pro AR15 Ops Ready S1 Mil-spec Stock Only, Black, RBUS1BMS , MPN: RBUS1BMS , UPC: 4717385551121 , Code: 2NZ-BSC-OPS1MS-RBUS1BMS
  • UTG Pro AR15 Ops Ready S1 Mil-spec Stock Only, FDE, RBUS1DMS , MPN: RBUS1DMS , UPC: 4717385551305 , Code: 2NZ-BSC-OPS1MS-RBUS1DMS

UTG Pro AR15 Ops Ready S1 Mil-spec Stock Unavailable & Discontinued Models

List of Unorderable Models

  • USED, UTG Pro AR15 Ops Ready S1 Mil-spec Stock Only, Black, RBUS1BMS , MPN: RBUS1BMS-EDEMO , Code: 2NZ-BSC-OPS1MS-RBUS1BMS-EDEMO-WP-A
  • USED, UTG Pro AR15 Ops Ready S1 Mil-spec Stock Only, Black, RBUS1BMS , MPN: RBUS1BMS-EDEMO , Code: 2NZ-BSC-OPS1MS-RBUS1BMS-EDEMO-IN-C
  • USED UTG Pro AR15 Ops Ready S1 Mil-spec Stock Only, Black, RBUS1BMS, EDEMO17, Used, Condition Fair , MPN: RBUS1BMS-EDEMO17 , Code: 2NZ-BSC-OPS1MS-RBUS1BMS-EDEMO17
  • USED UTG Pro AR15 Ops Ready S1 Mil-spec Stock Only, FDE, RBUS1DMS, EDEMO3, Used, Condition Fair , MPN: RBUS1DMS-EDEMO3 , Code: 2NZ-BSC-OPS1MS-RBUS1DMS-EDEMO3
  • USED UTG Pro AR15 Ops Ready S1 Mil-spec Stock Only, Black, RBUS1BMS, EDEMO16, Used, Condition Like New, Open Box , MPN: RBUS1BMS-EDEMO16 , Code: 2NZ-BSC-OPS1MS-RBUS1BMS-EDEMO-OB-A
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Last updated 2026-07-03 UTC.