I have an 870 Police with some miles on it. Not sure of the year but I'd have to guess 2004-2006. I have 1k of slug and buck tactical loads through her. I added a Knoxx stock years ago and I'm one of the people who it just rocks my cheek so it's not the most comfortable. I picked up a MagPul SGA to try.
Went to install the MagPul BUT my receiver has a large female end that is about 3x's the size of the allen bolt the MagPul came with. Something isn't right. I don't see a different model offered for the 870 for large or small receiver mount. Where am I going wrong?
Thanks.
MagPul SGA
-
TexasArmor84
- Senior Shotgunner
- Posts: 297
- Joined: Tue Dec 10, 2013 7:52 pm
Re: MagPul SGA
Sounds like you have the wrong part maybe they sent the one for a mossberg
Sent from my iPhone using Tapatalk Pro
Sent from my iPhone using Tapatalk Pro
-
Synchronizor
- Elite Shotgunner
- Posts: 3022
- Joined: Fri Dec 28, 2012 8:04 am
- Location: The Inland Northwest
- Contact:
Re: MagPul SGA
Somehow I missed this post back in 2016. Hopefully you got this figured out, but for the benefit of others, what likely happened is that your receiver stud came out when you removed your Knoxx stock.
The 870's stock bolt doesn't just thread directly into the receiver like on other shotguns. Instead, there's a threaded stand-off called the receiver stud (part #47 in the exploded diagram in your owner's manual) that threads into the 7/16" hole in the receiver, and then the 1/4" stock bolt or screw threads into that. This helps prevent the receiver itself from getting stripped out, makes it so that a too-long stock bolt can't extend into the receiver and interfere with the action, and increases the strength of the joint.
The 870's stock bolt doesn't just thread directly into the receiver like on other shotguns. Instead, there's a threaded stand-off called the receiver stud (part #47 in the exploded diagram in your owner's manual) that threads into the 7/16" hole in the receiver, and then the 1/4" stock bolt or screw threads into that. This helps prevent the receiver itself from getting stripped out, makes it so that a too-long stock bolt can't extend into the receiver and interfere with the action, and increases the strength of the joint.
- 870 receiver stud.jpg (23.52 KiB) Viewed 3134 times
- Slide06.PNG (286.69 KiB) Viewed 3134 times