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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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Layaway Not Available Layaway is not Available on Orders which Contain this Item.

Any orders placed for this item on Jan 13th - 21st...will NOT SHIP UNTIL Jan 23rd.

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.



Product Reviews
27 Reviews. Average Rating: 4.3 of 5 Stars! [4.3 of 5 Stars!]
5 stars:
67% (18 of 27)
4 stars:
15% (4 of 27)
3 stars:
7% (2 of 27)
2 stars:
7% (2 of 27)
1 star:
3% (1 of 27)
Display All Reviews
Reviewed By: on 12/08/2016
Rating: 5 of 5 Stars! [5 of 5 Stars!]
This thing fits the Interstate Arms HAWK 12 GA. PUMP DEFENSE SHOTGUN!!! I have been shooting this thing for most the year and its been great. Never had a single issue with this conversion kit. I havent decided on what kind of foregrip i like yet but i did change the pistol grip out for a nice AR one. Very good kit. I highly recommend.

Reviewed By: on 05/18/2016
Rating: 5 of 5 Stars! [5 of 5 Stars!]
This is the 2nd kit I have bought for the Remington 870. The first one I bought directly from Bullpup Unlimited when they first came out. In dealing with them, they gave me a little guidance on the fit of this kit. They told me that the Remington 870 Express models had some variances that can make them fit great, or a struggle. The first 870 I put it on, I was having a bit of a tuff time. Luckily, I had a 2nd 870 and changed to that one, and what do you know, it fit great. So, if you are reading these reviews and seeing people complain about the fit of this kit, it is more than likely the 870 itself.

I\'ve also seen complaints of the trigger feel. 870\'s have an ok to bad trigger feel to begin with, and the trigger mechanism is not going to make the trigger feel better. I think the trigger works fine...yes, it is a bit clunky, but this is a shotgun, not long range rifle or IPDA/ISPC pistol.

Depending on how the kit fits on the 870, the pump attachment may need a bit of lube where it rubs the rest of the kit. But, take a hack from the Glock owners (or other polymer frame & mags) and use some spray furniture polish on it...I used pledge. It does a good job of lubing without being a dust magnet. After a couple hundred rounds, I stopped using the pledge.

Overall, this is a fantastic bullpup kit for the money. You get to use a proven and reliable shotgun platform like the 870 (or mossberg 500/590) without spending $1200 for a bullpup shotgun. Plus, FPS Russia thinks its cool, so you should too!

Unfortunately, if you shoot left handed, this is a bad choice, unless you love to get hot shot shells ejected directly into your face.

Reviewed By: on 12/15/2015
Rating: 5 of 5 Stars! [5 of 5 Stars!]
The kit is awesome. I can't wait to add extras to the 870. It arrived 6 days after checkout. Thank you Buds!!!!!

Reviewed By: on 06/12/2015
Rating: 5 of 5 Stars! [5 of 5 Stars!]
Really cool kit, well thought out and easy to assemble.
I put this on a IAC Hawk 981R works great. slight lag in the trigger but with this sort of kit I dont see any way around it and its not bad.

Ive seen people say it wont work for lefties but the port is far enough infront of your face and with the deflector a leftie could use this no problem.

And lastly, to get the four long screws by the handle its much easier to remove the pistol grip to run those in.

Reviewed By: on 05/28/2015
Rating: 5 of 5 Stars! [5 of 5 Stars!]
My 870 went in flawlessly. Have put 200 rounds through it. I lubricated everything inside and out. Mainly because of some other reviews I was reading. For me it works like a charm. It is true that it takes about two boxes of ammo to get it properly broke in. It still was shooting fine but wasn't butter smooth like it is now. That should have been expected from many of reviewers. I added an 8 round mag extension. No need to over tighten it. I left my original barrel on it. Gun was shooting high due to shortend overall length and raised rail. I put a magpul pop-up front sight on rail and it shoots perfect. no need for back sight. Added single point sling this thing rocks and runs great. .Your only limited by your imagination and willingness to use it for what you could put on this thing. It really is fully customizable! And adjustable! If you tighten slide down to tight, then back it off a bit. Don't review and say it terrible. This is a great quality product to start. But we make it better!

Reviewed By: on 04/08/2015
Rating: 5 of 5 Stars! [5 of 5 Stars!]
I found the BullPup Unlimited kit to be well made and easily installed. When I first opened the box I thought that the plastic might not be sturdy enough for the task at hand BUT, after completing assembly and firing I found the combination works like a champ. Having never owned a bullpup configuration firearm I found this one to be easy and fun to shoot. All of the functions, safety, slide release, pump action worked as advertised. My lack of experience with disassembling pump guns makes my only suggestion that the buyer insure that He/She has a forend wrench available for the removal of the 870's forend. I'm very happy with my purchase from 'Bud's Gun Shop' !!!

Reviewed By: on 12/09/2014
Rating: 3 of 5 Stars! [3 of 5 Stars!]
its a novelty item. the bu870 is well made but feels cheap due to their trigger. but you get to cut off 10 inches without the need for a tax stamp.

Reviewed By: on 11/06/2014
Rating: 5 of 5 Stars! [5 of 5 Stars!]
I ordered this stock from Buds Gun Shop on 10-29-14 and it was delivered on 11-3-14 very fast shipping. I done a lot of review reading about this product and after a few weeks of thinking about it I ordered it. installation from start to finish took about 1/2 an hour the instructions were easy to follow and very detailed and I am very pleased with the results, the bull pup 870 feels very comfortable and balanced and looks awesome, I would definitely recommend this product to anyone wanting to dress up their 870.

Reviewed By: on 10/07/2014
Rating: 4 of 5 Stars! [4 of 5 Stars!]
Ordered the bullpup kit from buds. Arrived fast with all parts needed in the box. Assembly took a little longer due to some of the screw holes having to be cleaned out. no major issues. Everything is tight and feels good. I was concerned about the quality after reading some of the reviews. I'm glad I ordered it. Makes for a beast of a home defense weapon.

Reviewed By: on 10/02/2014
Rating: 5 of 5 Stars! [5 of 5 Stars!]
are you kiddin me? this is the best thing you could ever do with your remington shot gun PERIOD! it feels solid, perfect balance, perfect size,and dont worry about the assembly,the utube video will guide you every step of the way. its got all the rails youll ever need and ITS BAD ASS!!

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