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Bullpup Unlimited Remington 870 Conversion Kit

Model: BPU870
Condition: Factory New
Bud's Item Number: 411554177
MFG: Other

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*Please Note!! Many of our pictures are stock photos provided to us by the manufacturer and do not necessarily represent the actual item being purchased. Please verify this picture accurately reflects the product described by the title and description on this page before you place your order.

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Introducing the Remington 870 Bullpup Conversion Kit from Bullpup Unlimited, Inc.  This conversion kit will take your 870 12g shotgun and shave down almost 10" from the overall length while retaining all the practicality and reliability the Remington 870 is known for!  All the tools needed for conversion are included and it can be done in less than an hour, not to mention it's fully reversible!

  • Designed to accept a wide variety of aftermarket AR-style accessories
  • Familiar AR-style grip and safety Split-trigger for increased safety
  • Variety of rail mounting areas for tactical accessories
  • Super-smooth and contoured slide release area
  • Rugged shell deflector for left handed shooters
  • Ergonomically shaped and easy-to-grip slide forearm
  • Generous access to loading port
  • Conversion assembles easily with tools provided
  • Easy to follow conversion instructions included
  • Multiple ambidextrous sling points for 1-point and 2-point sling
  • Field strips with tools included under butt pad
  • Manufactured from rugged, hi-tech, molded materials
  • Features an easy-to-grip, non-reflective surface texture
  • Does not in any way alter the original shotgun
  • Overall thickness: 2.75, width: 8, length: 28

*This item is the conversion kit only, gun not included. 

*Will not fit 3.5" models, a ribbed barrel, or rifled sights. ATI extended magazine tube will not work.

*This model will only work with Remington 870 12g shotguns.

If you have any questions about assembly after you receive your unit you are welcome to contact our Bullpup Rep - J.J.

He can be reach by email or phone Monday thru Friday 10am - 5pm est.

 Phone - (270) 585-3447

Email -  [email protected]  - preferred method.


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Product Reviews
16 Reviews. Average Rating: 4.2 of 5 Stars! [4.2 of 5 Stars!]
5 stars:
63% (10 of 16)
4 stars:
19% (3 of 16)
3 stars:
0% ( of 16)
2 stars:
12% (2 of 16)
1 star:
6% (1 of 16)
Reviewed By: Richard G on 05/27/2014 Rating: 2 of 5 Stars! [2 of 5 Stars!]
Was not very impressed. The item I received had rough edges all around, very tight fit on my 870, trigger would not work when 870 was installed. Even brought it to a gunsmith, was not able to fix it without some re work which I did not want to risk. Nice and short but cumbersome. Seems like the only practical way to shoot this would be from the hip. A very expensive toy for sure!!!

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Reviewed By: Richard P on 04/21/2014 Rating: 2 of 5 Stars! [2 of 5 Stars!]
Just put my bullpup together. The bullpup is much thicker than your standard 870 and feels a lot thicker than I thought it would. The pump action is significantly stiffer and not nearly as smooth with this kit. The line of sight is a little awkward with the barrel being in line with the top of the buttstock. This is feeling like more of a novelty than a practical home defense weapon.

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Reviewed By: JEFF C on 04/21/2014 Rating: 1 of 5 Stars! [1 of 5 Stars!]
The mechanism that connect the pump to the bull pup broke
on the 4th shot of target load ammo. What a bummer, now the shotgun won't cycle ammo.Maybe if it had been made from metal instead of polymers. Now I have to take it all apart to get to that piece and try to get a replacement. I really had high hopes for this conversion, but I dont know if I can trust it.

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Reviewed By: James H on 04/19/2014 Rating: 5 of 5 Stars! [5 of 5 Stars!]
Aside from the remarkably easy and fast service from Bud's, this kit rocks!

Spent a lot of time online reading and viewing reviews. After receiving and assembling the kit around a new 870, I have to agree with the 99% who found this a quality product.

Easy to convert the 870 and assembler the kit. The kit contained all the necessary tools and exactly the right number of parts. Assembly in under an hour and when done, wow!

Looks great, handles like silk and reliable as sunrise. Great American innovation, construction and function.

This kit is a winner.

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Reviewed By: lee g on 04/04/2014 Rating: 4 of 5 Stars! [4 of 5 Stars!]
I've owned sks bullpup varieties, Mossberg 500 bullpup, a mosin nagant m44 bullpup, and the 870 bullpup kit is the most solid stock system I've seen for a bullpup CONVERSION. Everything fits as it should, everything locks up nice and tight but I had to put final assembly into a vice to lock down and tighten so that it was that tight. The trigger feels good, the slide action feels solid and has less wobble than a stock ribbed 870 forend. The only reason I rate it 4/5 and not 5/5 is due to the severely sharp edges underneath the forend where stock is cutaway for the pump action, as well as the seams. Fit, and feel are solid, I thought a little more detail could've been paid to final product but it's a solid stock system

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