View Full Version : Stupid AR-10 stock question

04-15-2009, 7:51 PM
I am putting together an AR-10 and I am getting some conflicting info.
I was under the assumption, because it makes sense, that an AR-10 needs a different spring and buffer for the stock than an AR-15.

However, I just saw an add for a Magpul PRS stock and the add said that it is interchangeable between the AR-15 and AR-10 with no extra parts or accessories needed.

Whats the story?

EBR Works
04-15-2009, 8:04 PM
The Magpul PRS 308 stock is identical to the 307 model except that the cheek piece is smaller to allow for the longer charging handle on a 308 build. You can use either stock on a non-308 AR. If you use the 307 model stock on a 308 build, you cannot operate the charging handle with the cheek piece raised. 308 rifle builds usually require a specific buffer and spring that is not interchangeable with a non-308 build.

04-15-2009, 8:22 PM
What he said ...

04-15-2009, 8:51 PM
Ahhhh. I thought that was the case on the spring and buffer but I didn't know about the cheek piece and the charging handle. Thanks for the info, i'll wait for my backordered stock rather than try to get something from an individual.
Glad I asked.