Upper to lower pin question

[Jason762]

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. 

[MikedaddyH]

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

[survivalshop]

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 .

[shepp]

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