Just finished my first build, Bushmaster Dissy upper, Ameetec lower, Stag LPK, A2 stock. There's slight movement between the upper and lower receiver. Is this normal?

Also, when I put a magazine into the mag well with the bolt forward, it will slide in the majority of the way, then it takes a little extra push to get the magazine catch to engage. It doesn't have this problem when the bolt is back, so i'm wondering it if's a problem with my build. I'm using DPMS teflon coated 20 rndrs.

Thanks in advance.

the mag issue isnt a problem or at least to me.


the upper lower play is normal to an extent. its cause the lowers are machined/refinished by different hands/machines