Sniper & Sharpshooter Forums banner

1 - 9 of 9 Posts

·
Registered
Joined
·
6 Posts
Discussion Starter #1
I recently built an upper for my DPMS in 260 Remington with a 28 " Bartlein barrel in 1in 8.5 . The original rifle was an
DPMS AP 4 with an adjustable stock . I changed out the stock with a Magpul PRS stock with an extention .The problem is the bolt will not come back far enough to take the bullet from the mag when the rifle buffer is in the rifle . Would anyone have any idea what I could do to get it to operate correctly .
 

·
Banned
Joined
·
2,249 Posts
What buffer did you use in your PRS? The buffer for a collapsable stock and the fixed (A1/A2) stock are very different.

You gotta tell us everything.

Stock: Magpul PRS for AR-10 (I hope you didnt buy a PRS for an AR-15)
Buffer tube:
Buffer Spring:
Buffer:
 

·
Registered
Joined
·
6 Posts
Discussion Starter #3
I recently built an upper for my DPMS in 260 Remington with a 28 " Bartlein barrel in 1in 8.5 . The original rifle was an
DPMS AP 4 with an adjustable stock . I changed out the stock with a Magpul PRS stock with an extention .The problem is the bolt will not come back far enough to take the bullet from the mag when the rifle buffer is in the rifle . Would anyone have any idea what I could do to get it to operate correctly .
 

·
Registered
Joined
·
6 Posts
Discussion Starter #4
I put an A2 extension tube with rifle spring and buffer . I also bought an extension so that there would be room for the charging handle .All are DPMS parts when I figure out how to include a pic I will send one.The box and invoice says 308
 

·
Registered
Joined
·
5,155 Posts
308 rifle spring and buffer, or 5.56 rifle spring and buffer?
 

·
Registered
Joined
·
2,949 Posts
Your problem may be the screw that attaches the stock to the buffer tube (buttstock screw). The PRS requires a very short screw something around 1.5" if memory serves. If you have put an extension on, then you need a longer screw but it cannot be longer than the original screw + the extension length. My guess is that you are using a longer screw and the buffer is hitting it.

There is another issue with the extensions. The buttstock screw that Magpul provides with the PRS is vented (has a hole through it). Any replacement screw should also have a hole. I'm not 100% sure I believe that this is necessary. But my assumption is that if Magpul could substitute a less expensive item they would, so they think it's necessary.
 

·
Registered
Joined
·
18 Posts
Just make sure that you have a rifle buffer and not a carbine buffer in the PRS. The carbine buffer is shorter and with enough gas can push the charging handle through your face(Orbit bone) . Rifle buffer for rifle stock carbine buffer for carbine stock. This is very important.

Sent from my SM-G955U using Tapatalk
 
1 - 9 of 9 Posts
Top