I was wondering if the A&K M4 RIS would fit my LM4 PTR? I had seen that some had issues with this while others did not. On the compatibility list thread, page 6, I found this post:
Magpul PTS stock
A&K M4 RIS
No mods needed
Also put on some acesseries
Utg light w/ pressure pad.
How does this rail system fit exactly, if it fits the LM4 to begin with?
Edited by DarkCobra262, 10 June 2014 - 03:03 PM.