Jason762 Posted February 22, 2017 Report Share Posted February 22, 2017 I've got a Guntec USA upper reciever and handguard. Recently I purchased a Aero M5 lower and pin kit. The upper and lower fit together very loose. Aero advertises their lowers to accept DPMS pins and I called Guntec and they say the same thing. I'm bringing both halfs to work tomorrow to actually measure the holes but the holes in the upper are obviously a little bigger. Quote Link to comment Share on other sites More sharing options...
MikedaddyH Posted February 22, 2017 Report Share Posted February 22, 2017 (edited) Easy answer. Buy a Aero upper receiver . A matched set will fit better. Then sell the Guntec upper receiver or keep it for the next build ! Edited February 22, 2017 by MikedaddyH Quote Link to comment Share on other sites More sharing options...
survivalshop Posted February 22, 2017 Report Share Posted February 22, 2017 1 hour ago, Jason762 said: I've got a Guntec USA upper reciever and handguard. Recently I purchased a Aero M5 lower and pin kit. Were the Pins in the Lower Receiver already or did you get them from somewhere else . & if you got them separate , are they 308AR Pins ? As said above , we recommend the Same Manufacturer Upper & Lower Receives , because of potential fitment issues as you describe . Tolerance Stacking from different manufacturers . Quote Link to comment Share on other sites More sharing options...
shepp Posted February 22, 2017 Report Share Posted February 22, 2017 Welcome to the forum feel free to tell us about your self in the intro section as the guys said, being there is no milspec like their little brothers same and same is your best bet Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.