Well I recommend a magwell, extended magazine release, a match grade barrel (kkm precision or bar-sto) and a new grip. I'm just getting into shooting competitively and that's what I'm starting with. I have all of the above mentioned and it's improved my shooting quite a bit with the Glock. The kkm barrel I have has helped a great deal with overall accuracy and tighter groups.
GOFFA Council Member
Gun Owners For a Free America
"Today, we need a nation of Minutemen, citizens who are not only prepared to take arms, but citizens who regard the preservation of freedom as the basic purpose of their daily life and who are willing to consciously work and sacrifice for that freedom."
~John F. Kennedy