Ok...I'm not exactly sticking to the survey.
But heres my $.02:
#1 Crappy out of the box trigger pulls.
By far my biggest pet peeve.
#2 Crappy substandard finish.
I hate the way bluing rusts when you look at it.
I buy everything parked, matte stainless, etc.
#3 Crappy, poorly fitted furniture.
I hate the way AR 15 and AK handguards will work loose too.
#4 Not being able to get any decent looking AND functional furniture.
I love the FAL family, hate the stocks on most of them.
The pistol grip is raked back at too sharp an angle and the replacement after market stuff isn't that much better. The LOP is crap, and I can't get a cheek weld on it. same with HK G series.
#5 Safety/selectors in weird places.
HK G3... Nuff said.
If my thumb joint was "z" shaped I would be in biz.
Same with Metric FALs, and numerous others.
At least I can work an AK safety with my trigger finger...
#6 1911s that need to have throat/ramp jobs to feed JHPs
#7 Non-beveled mag wells.
Perfect example: HK G3- not only it is not beveled for insertion, but half the time they are so tight the mags don't drop free either.
Thats after you have to hit the mag release with your off hand [or repositioned firing hand ] when you should be reaching for your reload with it. Button or lever, neither are placed conveniently. Cocking lever in the forearm...yeah, great idea. [see #5]
#8 Non-beveled mag wells.
Yeah, see #7....why make everything as hard as possible ?
# 9 Huge [wide] magazine floor plates on pistols.
A pad on the bottom is good, having a hell of a time packing mags in pouches because they wont stack flat against one another is just lame.
#10 mag releases that can't be operated with the firing hand.
#11 Non-reciprocating bolt handles on semi's.
This should be #2. I really hate this.
Why do I need a forward assist again ?
Why not just make the bolt reciprocating so I can force the bolt open or closed as desired ? Clearing a malfunction in a rifle should be as easy as grabbing an auto-pistol's slide and working it.
+2 AK & M1/M1a/M14 for getting it right.
#12 Weapons that are a PITA to field strip.
This transfers to cars as well.
Why do I have to unbolt and remove my alternator to change the last spark plug again ?
Anyway...just a few...